Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Post sintering operation
Patent
1998-04-22
2000-01-04
Jenkins, Daniel J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Post sintering operation
B22F 324
Patent
active
060106603
ABSTRACT:
A method of doping tantalum pellets with nitrogen is described wherein the resulting pellets are substantially free of nitride precipitate on their outer surfaces. The method includes the step of heating the pellets to a temperature of from about 1000-1400.degree. C. in a nitrogen gas atmosphere and then in a vacuum which causes nitrogen contacting a tantalum pellet to diffuse into the inner portion of the pellet instead of forming a precipitate. The resulting pellets have improved DCL stability and reliability in comparison to prior art nitrogen-doped tantalum pellets.
REFERENCES:
patent: 3789274 (1974-01-01), Pfister et al.
patent: 4164455 (1979-08-01), Aronson et al.
patent: 4621277 (1986-11-01), Ito et al.
patent: 5330931 (1994-07-01), Emesh et al.
patent: 5394000 (1995-02-01), Ellul et al.
patent: 5448447 (1995-09-01), Chang
patent: 5452178 (1995-09-01), Emesh et al.
patent: 5454147 (1995-10-01), Kobayashi et al.
patent: 5554870 (1996-09-01), Fitch et al.
patent: 5569619 (1996-10-01), Roh
patent: 5622746 (1997-04-01), Hahn et al.
Jenkins Daniel J.
Vishay Sprague, Inc.
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