Metallic glass alloys of Zr, Ti, Cu and Ni

Patent · Wed Jan 01 00:00:00 EST 1997

OSTI ID:870893

Lin, Xianghong ^[1]; Peker, Atakan ^[1]; Johnson, William L ^[1]

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1. Pasadena, CA

At least quaternary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10.sup.3 K/s. Such alloys comprise titanium from 19 to 41 atomic percent, an early transition metal (ETM) from 4 to 21 atomic percent and copper plus a late transition metal (LTM) from 49 to 64 atomic percent. The ETM comprises zirconium and/or hafnium. The LTM comprises cobalt and/or nickel. The composition is further constrained such that the product of the copper plus LTM times the atomic proportion of LTM relative to the copper is from 2 to 14. The atomic percentage of ETM is less than 10 when the atomic percentage of titanium is as high as 41, and may be as large as 21 when the atomic percentage of titanium is as low as 24. Furthermore, when the total of copper and LTM are low, the amount of LTM present must be further limited. Another group of glass forming alloys has the formula (ETM.sub.1-x Ti.sub.x).sub.a Cu.sub.b (Ni.sub.1-y Co.sub.y).sub.c wherein x is from 0.1 to 0.3, y.cndot.c is from 0 to 18, a is from 47 to 67, b is from 8 to 42, and c is from 4 to 37. This definition of the alloys has additional constraints on the range of copper content, b.

• Research Organization: California Institute of Technology (CalTech), Pasadena, CA (United States)
• DOE Contract Number: FG03-86ER45242
• Assignee: California Institute of Technology (Pasadena, CA)
• Patent Number(s): US 5618359
• OSTI ID: 870893
• Country of Publication: United States
• Language: English

Related Subjects

metallic
glass
alloys
zr
cu
quaternary
form
cooling
below
transition
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rate
10
comprise
titanium
19
41
atomic
percent
metal
etm
21
copper
plus
ltm
49
64
comprises
zirconium
hafnium
cobalt
nickel
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1-x
1-y
cndot
18
47
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37
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range
content
ternary alloy
metallic glass
glass forming
atomic percent
transition metal
transition temperature
form metal
glass transition
alloys comprise
atomic percentage
comprises cobalt
alloys form
quaternary alloys
form metallic
cooling below
glass alloys
ternary alloys
quaternary alloy
/148/420/