Compositions: ceramic – Ceramic compositions – Refractory
Patent
1990-07-24
1993-02-16
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501 98, 264 63, C04B 3558
Patent
active
051871297
ABSTRACT:
A process for making silicon powder or articles of manufacture such as an internal combustion engine valve by comminuting a homogeneous water-base slurry of silicon powder and at least one nitriding agent and permitting the slurry to chemically react for a time sufficient to enable the chemical reaction to substantially reach completion, then reducing the water content sufficiently to form a powder or an article and thence nitriding the article or powder by continuously varying the temperature over the range of 1000.degree. C. to 1450.degree. C. using a nitriding gas comprising nitrogen, hydrogen and helium and maintaining a constant nitriding gas composition throughout the nitriding cycle.
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Edler James P.
Lisowsky Bohdan
Bell Mark L.
Cargill L. E.
Eaton Corporation
Jones Deborah
Rulon P. S.
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