Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1992-07-17
1994-10-04
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264 64, 264 65, C04B 3558
Patent
active
053523954
ABSTRACT:
Sintering of an article molded from a first particulate material comprising silicon nitride employs carbon and ceramic-containing layers. At least one outer layer comprising a second particulate material is positioned with respect to the article so as to be closely adjacent to but not contacting the article, and at least one inner layer comprising a third particulate material is intermediate to the outer layer and the article so as to at least partially surround the article. The second particulate material comprises at least about 90 weight percent carbon, and the third particulate material comprises a ceramic compound selected from a nitride, a carbide, and mixtures thereof. The article is heated while positioned with respect to the outer and inner layers as described above so as to result in a sintered article.
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Gerhold Bruce W.
Kallenbach Lyle R.
Derrington James
Phillips J. E.
Phillips Petroleum Company
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