Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Powder pretreatment
Reexamination Certificate
2006-05-10
2009-10-13
King, Roy (Department: 1793)
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Powder pretreatment
C419S048000, C419S049000, C419S067000, C148S237000, C148S238000, C075S244000, 42, 42
Reexamination Certificate
active
07601296
ABSTRACT:
A method of forming a sputtering target and other metal articles having controlled oxygen and nitrogen content levels and the articles so formed are described. The method includes surface-nitriding a deoxidized metal powder and further includes consolidating the powder by a powder metallurgy technique. Preferred metal powders include, but are not limited to, valve metals, including tantalum, niobium, and alloys thereof.
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International Search Report for PCT/US2004/000270 dated Nov. 12, 2004.
Maguire James
Michaluk Christopher A.
Yuan Shi
Cabot Corporation
Kessler Christopher
King Roy
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