Metal treatment – Stock – Amorphous – i.e. – glassy
Patent
1993-04-07
1994-02-22
Roy, Upendra
Metal treatment
Stock
Amorphous, i.e., glassy
420417, 420422, C22C 900, C22C 1400
Patent
active
052883442
ABSTRACT:
Alloys which form metallic glass upon cooling below the glass transition temperature at a rate appreciably less than 10.sup.6 K/s comprise beryllium in the range of from 5 to 52 atomic percent and at least one early transition metal in the range of from 30 to 75% and at least one late transition metal in the range of from 2 to 52%. A preferred group of metallic glass alloys has the formula (Zr.sub.1-X Ti.sub.X).sub.a (Cu.sub.1-y Ni.sub.y).sub.b Be.sub.c. Generally, a is in the range from 30 to 75% and the lower limit increases with increasing x. When x is in the range of from 0 to 0.15, b is in the range of from 5 to 52%, and c is in the range of from 6 to 47%. When x is in the range of from 0.15 to 0.4, b is in the range of from 5 to 52%, and c is in the range of from 5 to 47%. When x is in the range of from 0.4 to 0.6, b is in the range of from 5 to 52%, and c is in the range of from 5 to 47%. When x is in the range of from 0.6 to 0.8, b is in the range of from 5 to 52%, and c is in the range of from 5 to 42%. When x is in the range of from 0.8 to 1, b is in the range of from 5 to 52%, and c is in the range of from 5 to 30%. Other elements may also be present in the alloys in varying proportions.
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Johnson William L.
Peker Atakan
California Institute of Technology
Roy Upendra
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