Sintered reaction-bonded silicon nitride components

PCT No. PCT/GB95/01037 Sec. 371 Date Dec. 19, 1996 Sec. 102(e) Date Dec. 19, 1996 PCT Filed May 9, 1995 PCT Pub. No. WO96/01236 PCT Pub. Date Jan. 18, 1996Sintered reaction-bonded silicon nitride components, e.g., automotive components, are made by forming a powder mixture comprising silicon and oxi...

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Hauptverfasser:	BUTLER, NICHOLAS DOMINIC, HEPWORTH, MATTHEW ARNOLD, PINDAR, CAROL JAYNE, WORDSWORTH, ROBERT ALAN
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TREATMENT OF NATURAL STONE
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Zusammenfassung:	PCT No. PCT/GB95/01037 Sec. 371 Date Dec. 19, 1996 Sec. 102(e) Date Dec. 19, 1996 PCT Filed May 9, 1995 PCT Pub. No. WO96/01236 PCT Pub. Date Jan. 18, 1996Sintered reaction-bonded silicon nitride components, e.g., automotive components, are made by forming a powder mixture comprising silicon and oxide or oxide precursor additives. These additives comprise alumina and a calcium compound. The powder is formed into a preform, the silicon is reacted with nitrogen in a nitriding process to form silicon nitride, and the so-formed silicon nitride is sintered.