U.S. patent application number 12/406419 was filed with the patent office on 2009-11-26 for amorphous alloy and a preparation method thereof.
Invention is credited to Hailin Chen, Kuan Gao, Qing Gong, Kun Lu, Bitao Pan, Faliang Zhang.
Application Number | 20090288741 12/406419 |
Document ID | / |
Family ID | 40846125 |
Filed Date | 2009-11-26 |
United States Patent
Application |
20090288741 |
Kind Code |
A1 |
Zhang; Faliang ; et
al. |
November 26, 2009 |
Amorphous Alloy and A Preparation Method Thereof
Abstract
In one aspect, an amorphous alloy comprises Cu, Zr, Be and M. M
is at least one element selected from a group consisting of Al, Sn,
Si, group IB, group IIB, group IIIB, group IVB, group VB, group
VIB, group VIIB and group VIIIB of the element periodic table,
provided that the element is not Cu or Zr. In another aspect, an
amorphous alloy comprises Cu, Zr, RE and M. RE is at least one
element selected from the rare earth elements, M is at least one
element selected from a group consisting of Al, Sn, Si, group IB,
group IIB, group IIIB, group IVB, group VB, group VIB, group VIIB
and group VIIIB of the element periodic table, provided that the
element is not Cu, Zr or RE. In yet another aspect, a method for
preparing an amorphous alloy comprises melting a raw material
comprising Cu, Zr, Be, and M to form an alloy. M is at least one
element selected from a group consisting of Al, Sn, Si, group IB,
group IIB, group IIIB, group IVB, group VB, group VIB, group VIIB
and group VIIIB of the element periodic table, provided that the
element is not Cu or Zr.
Inventors: |
Zhang; Faliang; (Shenzhen,
CN) ; Gao; Kuan; (Shenzhen, CN) ; Lu; Kun;
(Shenzhen, CN) ; Pan; Bitao; (Shenzhen, CN)
; Gong; Qing; (Shenzhen, CN) ; Chen; Hailin;
(Shenzhen, CN) |
Correspondence
Address: |
BRINKS HOFER GILSON & LIONE
P.O. BOX 10395
CHICAGO
IL
60610
US
|
Family ID: |
40846125 |
Appl. No.: |
12/406419 |
Filed: |
March 18, 2009 |
Current U.S.
Class: |
148/561 ;
148/403 |
Current CPC
Class: |
C22C 30/04 20130101;
C22C 1/002 20130101; C22C 9/00 20130101; C22C 16/00 20130101; C22C
30/02 20130101; C22C 45/001 20130101; C22C 45/10 20130101 |
Class at
Publication: |
148/561 ;
148/403 |
International
Class: |
C22C 45/00 20060101
C22C045/00; C22C 1/02 20060101 C22C001/02 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 21, 2008 |
CN |
200810066316.5 |
Jan 20, 2009 |
CN |
200910009789.6 |
Claims
1. An amorphous alloy, comprising: Cu, Zr, Be and M; wherein M is
at least one element selected from a group consisting of Al, Sn,
Si, group IB, group IIB, group IIIB, group IVB, group VB, group
VIB, group VIIB and group VIIIB of the element periodic table,
provided that the element is not Cu or Zr.
2. The amorphous alloy of claim 1, wherein the atomic ratio of Cu
to Zr is about 0.5 to 1.0.
3. The amorphous alloy of claim 1, which comprises about 15-45
atomic percent of Cu, about 10-50 atomic percent of Zr, less than
about 30 atomic percent of Be, and about 5-35 atomic percent of
M.
4. The amorphous alloy of claim 3, which comprises about 30-45
atomic percent of Cu, about 30-40 atomic percent of Zr, about
0.01-10 atomic percent of Be, and about 5-25 atomic percent of
M.
5. The amorphous alloy of claim 1, wherein M is at least one
element selected from a group consisting of Al, Sn, Si, Ti, Ag, Ni,
Ta, Hf, Co, Fe, Nb and Y.
6. An amorphous alloy, comprising: Cu, Zr, RE and M; wherein RE is
at least one element selected from the rare earth elements, M is at
least one element selected from a group consisting of Al, Sn, Si,
group IB, group IIB, group IIIB, group IVB, group VB, group VIB,
group VIIB and group VIIIB of the element periodic table, provided
that the element is not Cu, Zr or RE.
7. The amorphous alloy of claim 6, wherein M comprises Ti and
Al.
8. The amorphous alloy of claim 7, which comprises about 15-45
atomic percent of Cu, about 10-50 atomic percent of Zr, about
0.1-10 atomic percent of Ti, about 1-20 atomic percent of Al, and
about 0.01-10 atomic percent of RE.
9. The amorphous alloy of claim 6, which comprises about 15-40
atomic percent of Cu, about 20-40 atomic percent of Zr, about 15-30
atomic percent of Be, and about 10-35 atomic percent of M.
10. The amorphous alloy of claim 6, which comprises about 20-30
atomic percent of Cu, about 30-40 atomic percent of Zr, about 20-25
atomic percent of Be, and about 15-30 atomic percent of M.
11. A method for preparing an amorphous alloy comprising: melting a
raw material comprising Cu, Zr, Be, and M to form an alloy; wherein
M is at least one element selected from a group consisting of Al,
Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB, group
VIB, group VIIB and group VIIIB of the element periodic table,
provided that the element is not Cu or Zr.
12. The method of claim 11, wherein the raw material comprises
about 15-45 atomic percent of Cu, about 10-50 atomic percent of Zr,
less than about 30 atomic percent of Be, and about 5-35 atomic
percent of M.
13. The method of claim 11, wherein M is at least one element
selected from a group consisting of Al, Sn, Si, Ti, Ag, Ni, Ta, Hf,
Co, Fe, Nb and Y.
14. The method according to claim 11, wherein the melting step
comprises: melting the raw material to form a molten mixture;
cooling the molten mixture to form at least one ingot; and
re-melting the at least one ingot to form the amorphous alloy.
15. The method according to claim 11, wherein the raw material is
melted under a vacuum of about 0.01-1000 Pa.
16. The method according to claim 11, wherein the raw material is
melted under a vacuum of no more than about 200 Pa.
17. The method according to claim 11, wherein the raw material is
melted at a temperature of about 1,500-2,500.degree. C.
18. The method according to claim 11, wherein the raw material is
melted at a temperature of about 700-2,000.degree. C.
19. The method according to claim 11, wherein the cooling speed of
the cooling molding process is about 10-10.sup.4 K/s.
20. The method according to claim 11, wherein the raw material is
melted in the presence of an inert gas.
21. The method according to claim 11, wherein the purity of Cu, Zr,
M and Be is about 98%.
22. The method according to claim 11, wherein the purity of Cu, Zr,
M and Be is about 99.9%.
Description
[0001] The present application claims priority to Chinese Patent
Application No. 200810066316.5, filed Mar. 21, 2008, and Chinese
Patent Application No. 200910009789.6, filed Jan. 20, 2009, the
entireties of both of which are hereby incorporated by
reference.
FIELD OF THE DISCLOSURE
[0002] The present disclosure relates to an amorphous alloy and a
preparing method thereof.
BACKGROUND OF THE DISCLOSURE
[0003] Amorphous alloy systems include different metal based
alloys. For example, there are Zr-based, Ti-based, Cu-based,
Fe-based, Pd-based, Pt-based, Mg-based, Co-based, Ca-based, Y-based
and lanthanide-based alloys, such as La-based, Pr-based, Nd-based
alloys and so on. Bulk amorphous alloys are disordered in the long
range but ordered in the short range. Due to the particular
microstructure, they have desirable mechanical properties, such as
high strength, high hardness, relatively wide elastic range, high
corrosion resistance, high wearing resistance and so on. The
amorphous alloys are widely used in many fields such as aviation,
spaceflight, IT electronics, mechanics, chemical industry and so
on. However, the preparation conditions of amorphous alloys are
strict: high vacuum level and high cooling speed. The size of most
prepared amorphous alloys is relatively small and the forms are
limited to strip, filament and powder. Therefore the applications
of amorphous alloys are limited. In order to obtain bulk amorphous
alloy material, the cooling speed should be high enough to prevent
the formation of orderly arrayed crystalline. Thus the cost may be
high for the manufacture process. The processes that cost less and
require less strict conditions is desirable to improve the
amorphous alloy forming ability.
[0004] Due to their particular structure, while under stress, the
amorphous alloy materials do not have the internal deformation
mechanism as crystalline materials do in order to resist
deformation. So when the stress reaches a certain degree, the
amorphous alloy material may break suddenly, which may lead to
accidents. Thus, the applications of the amorphous alloy materials
as structural materials are limited. A number of researches have
been undertaking to improve the application of bulk amorphous
alloys in engineering.
[0005] For conventional amorphous alloys such as (Cu, Zr)-based
alloy, strict preparing conditions and high purity of raw materials
are required. The disorder degree of the components is not enough
to avoid heterogeneity nucleus forming during the preparation
process. The forming of amorphous alloy depends on high cooling
speed to restrain atoms' spontaneous movement. In terms of
toughness characteristics, (Cu, Zr)-based amorphous alloy employs
the elements of which the atomic radiuses have no obvious
gradients. The atoms may not be piled compactly. Thus the crackle
resistance of the materials declines, which results in low
toughness in macroscopical structure.
SUMMARY OF THE DISCLOSURE
[0006] In one aspect, an amorphous alloy comprises Cu, Zr, Be and
M. M is at least one element selected from a group consisting of
Al, Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB,
group VIB, group VIIB and group VIIIB of the element periodic
table, provided that the element is not Cu or Zr.
[0007] In another aspect, an amorphous alloy comprises Cu, Zr, RE
and M. RE is at least one element selected from the rare earth
elements, M is at least one element selected from a group
consisting of Al, Sn, Si, group IB, group IIB, group IIIB, group
IVB, group VB, group VIB, group VIIB and group VIIIB of the element
periodic table, provided that the element is not Cu, Zr or RE.
[0008] In yet another aspect, a method for preparing an amorphous
alloy comprises melting a raw material comprising Cu, Zr, Be, and M
to form an alloy. M is at least one element selected from a group
consisting of Al, Sn, Si, group IB, group IIB, group IIIB, group
IVB, group VB, group VIB, group VIIB and group VIIIB of the element
periodic table, provided that the element is not Cu or Zr.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is the XRD diagram of the amorphous alloys prepared
in the Examples 1-6 and Control 1.
[0010] FIG. 2 is the XRD diagram of the amorphous alloys prepared
in the Examples 1'-5' and Control 1'.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0011] According to one embodiment of the present disclosure, a
(Cu, Zr)-based amorphous alloy is provided. The (Cu, Zr)-based
amorphous alloy comprises Cu, Zr, Be and M. M is at least one
element selected from a group consisting of Al, Sn, Si, and
transition metals, excluding Cu and Zr. The term transition metal
refers to elements from group IB, group IIB, group IIIB, group IVB,
group VB, group VIB, group VIIB and group VIIIB of the element
periodic table. Preferably, the alloy comprises about 15-45 atomic
percent of Cu, about 10-50 atomic percent of Zr, less than about 30
atomic percent of Be, and about 5-35 atomic percent of M. More
preferably, the alloy comprises about 30-45 atomic percent of Cu,
about 30-40 atomic percent of Zr, about 0.01-10 atomic percent of
Be, and about 5-25 atomic percent of M.
[0012] In one embodiment, a (Cu, Zr)-based amorphous alloy
comprises Cu, Zr, Be and M. M is at least one element selected from
a group consisting of Al, Sn, Si, Ti, Ag, Ni, Ta, Hf, Co, Fe, Nb
and Y.
[0013] In another embodiment, an amorphous alloy comprises Cu, Zr,
RE and M. RE is at least one element selected from the Rare-Earth
Group M is at least one element selected from a group consisting of
Al, Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB,
group VIB, group VIIB and group VIIIB of the element periodic
table, excluding Cu, Zr and RE. Preferably, the amorphous alloy
comprises about 15-40 atomic percent of Cu, about 20-40 atomic
percent of Zr, about 15-30 atomic percent of Be, and about 10-35
atomic percent of M. More preferably, the amorphous alloy comprises
about 20-30 atomic percent of Cu, about 30-40 atomic percent of Zr,
about 20-25 atomic percent of Be, and about 15-30 atomic percent of
M. Preferably, M comprises Ti and Al. Preferably, the amorphous
alloy comprises about 15-45 atomic percent of Cu, about 10-50
atomic percent of Zr, about 0.1-10 atomic percent of Ti, about 1-20
atomic percent of Al, and about 0.01-10 atomic percent of RE.
[0014] According to another embodiment of the present disclosure, a
method for preparing a (Cu, Zr)-based amorphous alloy is provided.
The method comprises melting an raw material and cooling the liquid
of metal to form an amorphous alloy.
[0015] The material for preparing the (Cu, Zr)-based amorphous
alloy comprises Cu, Zr, Be and M. M is at least one element
selected from a group consisting of Al, Sn, Si, and transition
metals, excluding Cu and Zr.
[0016] The amount of each element mixed should be adjusted such
that the elements in the raw material have the ratio defined
above.
[0017] In the method for preparing the (Cu, Zr)-based amorphous
alloy, any suitable melting method can be used. For example, the
raw materials should be mixed first, and then cooled to form
ingots. In this step, the raw materials can be melted in an
electric arc melting equipment or an induction melting equipment.
The melting temperature and time differ to some extent according to
the heating process selected. Usually, the melting temperature can
be about 700-2,500.degree. C. Preferred temperature is about
1,500-2,500.degree. C. Another preferred temperature is about 700
to about 2000.degree. C. The vacuum level should be not higher than
about 1000 Pa, preferably about not higher than about 200 Pa. More
preferably, the vacuum is not higher than 10 Pa.
[0018] The ingots can be re-melted and molded. Electric arc
melting, induction melting, and resistance melting are commonly
used in the re-melting process. The re-melting temperature can be
about 700-2,000.degree. C., preferably about 800-1,200.degree.
C.
[0019] Any suitable molding method can be used to form the
amorphous alloy. For example, melt-spinning, copper mold casting,
suction casting, die casting, jetting molding, or water quenching
can be used. The cooling speed of the cooling ingot process is
about 10-10.sup.4 K/s, preferably about 10.sup.2-10.sup.3 K/s. The
cooling speed of the molding process can be about 10-10.sup.4 K/s,
preferably about 10.sup.2-10.sup.3 K/s.
[0020] Since the critical dimensions differ among different
components, different molding methods can be selected. The inert
gas can be one or more elements selected from the group zero
elements of the element periodic table, such as helium, neon,
argon, and krypton.
[0021] The present disclosure may improve the crystallization
resistance ability effectively and may achieve centimeter level
critical dimensions (bulk amorphous alloy has the critical
dimension of millimeter). Meanwhile, the strength and the toughness
of the amorphous alloys may be enhanced. Due to the better
amorphous alloy forming ability, the vacuum degree and cooling
speed are not strictly required during melting and molding, and the
equipments for melting and molding are not as strict as before.
Thus the production of the amorphous alloys can be industrialized
much easier. The material of the mould for molding can be low-cost
stainless steel, Be--Cu alloy or the materials which have low
thermal conductivity. Because of high crystallization resistance
ability of the amorphous alloys, the requirements for the purity of
the raw material and the vacuum level may be decreased.
[0022] There are two series examples for illustrating the present
disclosure.
[0023] Series 1
Example 1
[0024] Raw materials Cu, Zr, Ti, Al, Y (total amount is about 25
grams) were added to an electric arc melting equipment. The purity
of each component in raw materials is about 98 wt %. The ratios of
the raw materials were as follows:
Cu.sub.0.44Zr.sub.0.45Ti.sub.0.02Al.sub.0.07Y.sub.0.02. The
equipment was vacuumized to about 50 Pa. The raw materials were
melted at about 1,200-1,500.degree. C. under Ar protection for
about 20-50 seconds. The molten master alloy was mixed
sufficiently, and then cooled into an ingot with a cooling speed of
about 10.sup.3-10.sup.4 K/s. The ingot was re-melted at about
800-1,200.degree. C. using electric arc melting, and then cooled in
a beryllium-copper mold casting process with a cooling speed of
about 10.sup.3-10.sup.4 K/s to obtain the alloy sample C1 with the
size of about 3.times.10.times.100 mm.
Example 2
[0025] Raw materials Cu, Zr, Al, Ti, Be (total amount is about 200
kilograms) were added to an induction melting equipment. The purity
of each component in raw materials is about 98 wt %. The ratios of
the raw materials were as follows:
Cu.sub.0.43Zr.sub.0.45Al.sub.0.07Ti.sub.0.02Be.sub.0.02. The
equipment was vacuumized to about 100 Pa. The raw materials were
melted at about 1,200-1,500.degree. C. under Ar protection for
about 20 minutes. The molten master alloy was mixed sufficiently,
and then cooled into an ingot with a cooling speed of about
10-10.sup.2 K/s. The ingot was re-melted at about 800-1,200.degree.
C. using resistance calefaction melting, and then cooled in a
stainless steel mold casting process with a cooling speed of about
10.sup.2-10.sup.3 K/s to obtain the alloy sample C2 with the size
of about 3.times.10.times.100 mm.
Example 3
[0026] Raw materials Cu, Zr, Ag, Sn, Be (total amount is about 200
grams) were added to an induction melting equipment. The purity of
each component in raw materials is about 98 wt %. The ratios of the
raw materials were as follows:
Cu.sub.0.44Zr.sub.0.38Ag.sub.0.07Sn.sub.0.01Be.sub.0.1. The
equipment was vacuumized to about 500 Pa. The raw materials were
melted at about 1,200-1,500.degree. C. using induction melting
under Ar protection for about 30-60 seconds. The molten master
alloy was mixed sufficiently, and then cooled into an ingot with a
cooling speed of about 10-10.sup.2 K/s. The ingot was re-melted at
about 800-1,200.degree. C. using resistance calefaction melting,
and then cooled in a stainless steel mold casting process with a
cooling speed of about 10.sup.2-10.sup.3 K/s to obtain the alloy
sample C3 with the size of 3.times.10.times.100 mm.
Example 4
[0027] Raw materials Cu, Zr, Ti, Ni, Si, Be (total amount is about
200 kilograms) were added to an induction melting equipment. The
purity of each component in raw materials is about 98 wt %. The
ratios of the raw materials were as follows:
Cu.sub.0.44Zr.sub.0.11Ti.sub.0.3Ni.sub.0.08Si.sub.0.01Be.sub.0.04.
The equipment was vacuumized to about 300 Pa. The raw materials
were melted at about 1,200-1,500.degree. C. using induction melting
under Ar protection for about 20 minutes. The molten master alloy
was mixed sufficiently, and then cooled into an ingot with a
cooling speed of about 10-10.sup.2 K/s. The ingot was re-melted at
about 800-1,200.degree. C. using resistance calefaction melting,
and then cooled in a melt-spinning process with a cooling speed of
about 10.sup.3-10.sup.4 K/s to obtain the alloy sample C4 with the
size of about 3.times.10.times.100 mm.
Example 5
[0028] Raw materials Cu, Zr, Ti, Be (about 20 grams) were added to
a quartz tube. The purity of each component in raw materials is 98
wt %. The ratios of the raw materials were as follows:
Cu.sub.0.40Zr.sub.0.37Ti.sub.0.08Be.sub.0.15. The tube was
vacuumized to about 1,000 Pa. The raw materials were melted at
about 1,200-1,500.degree. C. using induction melting under Ar
protection for about 30-50 seconds. The molten master alloy was
mixed sufficiently, and then cooled into an ingot with a cooling
speed of about 10-10.sup.2 K/s. The ingot was re-melted at about
800-1,200.degree. C. using induction melting, and then cooled in a
water quenching process with a cooling speed of about
10.sup.3-10.sup.4 K/s to obtain the alloy sample C5 with the size
of about .phi.3.times.100 mm.
Example 6
[0029] Raw materials Cu, Zr, Al, Be (about 20 grams) were added to
a quartz tube. The purity of each component in raw materials is
about 98 wt %. The ratios of the raw materials were as follows:
Cu.sub.0.35Zr.sub.0.30Al.sub.0.05Be.sub.0.2. The tube was
vacuumized to about 500 Pa. The raw materials were melted at about
1,200-1,500.degree. C. using electric arc melting under Ar
protection for about 30-50 seconds. The molten master alloy was
mixed sufficiently, and then cooled into an ingot with a cooling
speed of about 10.sup.3-10.sup.4 K/s. The ingot was re-melted at
about 800-1,200.degree. C. using induction melting, and then cooled
in a water quenching process with a cooling speed of about
10.sup.3-10.sup.4 K/s to obtain the alloy sample C6 with the size
of .phi.3.times.100 mm.
Control 1
[0030] The control illustrates an amorphous material prepared
according to the existing art.
[0031] Raw materials Zr, Ti, Cu (about 25 grams) were added to an
electric arc melting equipment. The purity of each component in raw
materials is about 99 wt %. The ratios of the raw materials were as
follows: Cu.sub.0.60Zr.sub.0.30Ti.sub.0.10. The equipment was
vacuumized to about 5 Pa. The raw materials were melted at about
1,200-1,500.degree. C. under Ar protection for about 20-50 seconds.
The molten master alloy was mixed sufficiently, and then cooled
into an ingot with a cooling speed of about 10.sup.3-10.sup.4 K/s.
The ingot was re-smelted at about 800-1,200.degree. C. using
electric arc melting, and then cooled in a copper mold casting
process with a cooling speed of about 10.sup.3-10.sup.4 K/s to
obtain the alloy sample D with the size of 3.times.10.times.100
mm.
Experimental
[0032] The samples C1-C6 obtained in Example 1-6 and control sample
D were tested according to the methods as follow.
[0033] (1) Compression Test
[0034] The samples were tested on a XinSansi CMT5000 series testing
machine. The test results are shown in Table 1.
[0035] (2) Impact Test
[0036] The samples were tested on a XinSansi ZBC1000 series testing
machine. The test results are shown in Table 1.
[0037] (3) XRD Analysis
[0038] XRD analyzes the physical phase of an alloy material in
order to estimate whether the alloy is amorphous. The samples were
made into powder for test on a Model D-MAX2200PC X-ray Powder
Diffractometer using a Cu K.alpha. radiation. The incidence wave
length .lamda. was about 1.54060 .ANG.. The accelerating voltage
was about 40 kV. The current was about 20 mA. Step scan was used
with a step size of about 0.04 degree. The test results are shown
in FIG. 1.
[0039] (4) The Test of Critical Dimensions
[0040] A wedged sample formed in the copper mold casting process
was cut from the top by a thickness of about 1 mm. The cross
section after cutting was analyzed by XRD. The structure type was
determined. If the structure type was an amorphous alloy, then the
cutting process was continued until the structure was no longer an
amorphous alloy. The total cutting thickness was recorded. The
critical dimension was the total cutting thickness minus 1 mm. The
results are showed in Table 1.
TABLE-US-00001 TABLE 1 Compression Impact Critical Intensity
Absorbability Toughness Dimensions Samples (MPa) Work (J)
(KJ/m.sup.2) (mm) C1 2724.35 6.141 205.16 12 C2 2564.24 8.751
295.68 12 C3 2561.51 7.551 252.27 11 C4 2348.31 5.189 173.41 9 C5
2241.24 5.451 182.10 9 C6 2293.34 5.148 167.06 8 D 1834.56 3.521
116.95 7
[0041] As shown in FIG. 1, there are no sharp diffraction peaks in
the XRD diagrams of the samples C1-C6 and the sample D, which
indicates the alloys are all amorphous materials.
[0042] From the results shown in Table 1, the impact toughness of
the control sample D is 116.95 KJ/m.sup.2. For the samples C1-C6,
the impact toughness is between about 167.06 KJ/m.sup.2 to 295.68
KJ/m.sup.2. The higher the impact toughness, the better the impact
resistance capability of the material. The compression strength of
the samples C1-C6 is also higher than that of the sample D.
[0043] Series 2
Example 1'
[0044] Raw materials Cu, Zr, Ti, Ni, Be (total amount is about 25
grams) were added to an electric arc melting equipment. The purity
of each component in raw materials is about 99.9 wt %. The atomic
percent of the raw materials follows Cu:Zr:Ti:Ni:Be=23:36:12:9:20.
The equipment was vacuumized to about 5 Pa. The raw materials were
melted at about 1,800.degree. C. under Ar protection for about 30
seconds. The molten master alloy was mixed sufficiently, and then
cooled into an ingot with a cooling speed of about 10.sup.3 K/s.
The ingot was re-melted at about 1,800.degree. C. using electric
arc melting, and then cooled in a beryllium-copper mold casting
process with a cooling speed of about 10.sup.3 K/s to obtain the
alloy sample C1' with the size of about 3.times.10.times.100
mm.
Example 2'
[0045] Raw materials Cu, Zr, Al, Ni, Be (total amount is about 200
kilograms) were added to an induction melting equipment. The purity
of each component in raw materials is about 99.9 wt %. The atomic
percent of the raw materials follows Cu:Zr:Al:Ni:Be=25:35:9:6:25.
The equipment was vacuumized to about 100 Pa. The raw materials
were melted at about 1,600.degree. C. under Ar protection for about
20 minutes. The molten master alloy was mixed sufficiently, and
then cooled into an ingot with a cooling speed of about 10.sup.2
K/s. The ingot was re-melted at about 1,600.degree. C. using
resistance calefaction melting, and then cooled in a stainless
steel mold casting process with a cooling speed of about 10.sup.2
K/s to obtain the alloy sample C2' with the size of about
3.times.10.times.100 mm.
Example 3'
[0046] Raw materials Cu, Zr, Ag, Co, Be (about 20 grams) were added
to a quartz tube. The purity of each component in raw materials is
99.9 wt %. The atomic percent of the raw materials follows
Cu:Zr:Ag:Co:Be=30:30:5:15:20. The tube was vacuumized to about 200
Pa. The raw materials were melted at about 1,500.degree. C. using
induction melting under Ar protection for about 40 seconds. The
molten master alloy was mixed sufficiently, and then cooled into an
ingot with a cooling speed of about 50 K/s. The ingot was re-melted
at about 1,500.degree. C. using induction melting, and then cooled
in a water quenching process with a cooling speed of about 10.sup.3
K/s to obtain the alloy sample C3' with the size of about
3.times.10.times.100 mm.
Example 4'
[0047] Raw materials Cu, Zr, Hf, Fe, Be (total amount is about 200
kilograms) were added to an induction melting equipment. The purity
of each component in raw materials is about 99.9 wt %. The atomic
percent of the raw materials follows Cu:Zr:Hf:Fe:Be=20:30:10:20:20.
The equipment was vacuumized to about 5 Pa. The atomic percent
materials were melted at about 1,700.degree. C. using induction
melting under Ar protection for about 20 minutes. The molten master
alloy was mixed sufficiently, and then cooled into an ingot with a
cooling speed of about 10.sup.2 K/s. The ingot was re-melted at
about 1,700.degree. C. using resistance calefaction melting, and
then cooled in a melt-spinning process with a cooling speed of
about 10.sup.3 K/s to obtain the alloy sample C4' with the size of
about 3.times.10.times.100 mm.
Example 5'
[0048] Raw materials Cu, Zr, Ta, Nb, Be (about 20 grams) were added
to a quartz tube. The purity of each component in raw materials is
about 99.9 wt %. The atomic percent of the raw materials follows
Cu:Zr:Ta:Nb:Be=20:40:5:15:20. The tube was vacuumized to about 0.02
Pa. The raw materials were melted at about 1,800.degree. C. using
induction melting under Ar protection for about 50 seconds. The
molten master alloy was mixed sufficiently, and then cooled into an
ingot with a cooling speed of about 50 K/s. The ingot was re-melted
at about 1,800.degree. C. using induction melting, and then cooled
in a water quenching process with a cooling speed of about 10.sup.3
K/s to obtain the alloy sample C5' with the size of about
3.times.10.times.100 mm.
[0049] Control 1'
[0050] The control illustrates an amorphous material prepared
according to the prior art.
[0051] Raw materials Zr, Ti, Cu, Ni, Be (about 25 grams) were added
to an electric arc melting equipment. The purity of each component
in raw materials is about 99.9 wt %. The atomic percent of the raw
materials follows Cu:Zr:Ti:Ni:Be=12.5:41:14:10:22.5. The equipment
was vacuumized to about 5 Pa. The raw materials were melted at
about 1,800.degree. C. under Ar protection for about 50 seconds.
The molten master alloy was mixed sufficiently, and then cooled
into an ingot with a cooling speed of about 10.sup.3 K/s. The ingot
was re-smelted at about 1,800.degree. C. using electric arc
melting, and then cooled in a copper mold casting process with a
cooling speed of about 10.sup.3 K/s to obtain the alloy sample D'
with the size of 3.times.10.times.100 mm.
Experimental
[0052] The samples C1'-C5' obtained in Example 1'-5' and control
sample D' were tested according to the methods as follow.
[0053] (1) Impact Test
[0054] The samples were tested on a XinSansi ZBC1000 series testing
machine. The test results are shown in Table 2.
[0055] (2) XRD Analysis
[0056] XRD analyzes the physical phase of an alloy material in
order to estimate whether the alloy is amorphous. The samples were
made into powder for test on a Model D-MAX2200PC X-ray Powder
Diffractometer using a Cu K.alpha. radiation. The incidence wave
length .lamda. was about 1.54060 .ANG.. The accelerating voltage
was about 40 kV. The current was about 20 mA. Step scan was used
with a step size of about 0.04 degree. The test results are shown
in FIG. 2.
TABLE-US-00002 TABLE 2 Absorbability Impact Toughness Samples Work
(J) (KJ/m2) Example 1' C1' 9.148 304.959 Example 2' C2' 7.452
521.163 Example 3' C3' 7.696 256.548 Example 4' C4' 7.315 243.841
Example 5' C5' 6.918 230.602 Control 1' D' 4.621 153.770
[0057] As shown in FIG. 2, there are no sharp diffraction peaks in
the XRD diagrams of the samples C1'-C5' and the sample D', which
indicates the alloys are all amorphous materials.
[0058] From the results shown in Table 2, the impact toughness of
the control sample D' is 230.602 KJ/m.sup.2. For the samples
C1'-C5', the impact toughness is between about 243.841 KJ/m.sup.2
to 521.163 KJ/m.sup.2. Higher the impact toughness, better the
impact resistance capability of the material.
[0059] Many modifications and other embodiments of the present
disclosure will come to mind to one skilled in the art to which the
present disclosure pertains having the benefit of the teachings
presented in the foregoing description. It will be apparent to
those skilled in the art that variations and modifications of the
present disclosure can be made without departing from the scope or
spirit of the present disclosure. Therefore, it is to be understood
that the invention is not to be limited to the specific embodiments
disclosed and that modifications and other embodiments are intended
to be included within the scope of the appended claims. Although
specific terms are employed herein, they are used in a generic and
descriptive sense only and not for purposes of limitation.
* * * * *