Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2006-12-26
2006-12-26
Wyszomierski, George (Department: 1742)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
C148S403000, C420S423000
Reexamination Certificate
active
07153376
ABSTRACT:
An amorphous alloy having a composition consisting essentially of about 45 to about 65 atomic % Zr and/or Hf, about 4 to about 7.5 atomic % Ti and/or Nb, about 5 to about 15 atomic % Al and/or Zn, and the balance comprising a metal selected from the group consisting of Cu, Co, Ni, up to about 10 atomic % Fe, and Y intentionally present in the alloy composition in an amount not exceeding about 0.5 atomic %, such as about 0.2 to about 0.4 atomic % Y, with an alloy bulk oxygen concentration of at least about 1000 ppm on atomic basis.
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Yong Zhang et al., “Formation of Zr-Based Bulk Metallic Glasses from Low Purity of Materials by Yttrium Addition,”Material Transactions, JIM41(11), 2000, pp. 1410-1414.
Howmet Corporation
Timmer Edward J.
Wyszomierski George
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