MAKING HOT PRESSED SILICON NITRIDE BY USE OF LOW DENSITY REACTION BONDED BODY

MAKING HOT PRESSED SILICON NITRIDE BY USE OF LOW DENSITY REACTION BONDED BODY

PCT No. PCT/US82/01461 Sec. 371 Date Oct. 12, 1982 Sec. 102(e) Date Oct. 12, 1982 PCT Filed Oct. 12, 1982.A method of making a silicon nitride comprising object by use of a low density reaction bonded body is disclosed. An uncompacted mixture of silicon powder and a fluxing agent is heated in a nitr...

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Bibliographische Detailangaben
1. Verfasser: EZIS, ANDRE
Format: Patent
Sprache:eng
Schlagworte:
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS THEREOF
CONCRETE
INORGANIC CHEMISTRY
LIME, MAGNESIA
METALLURGY
NON-METALLIC ELEMENTS
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Zusammenfassung:PCT No. PCT/US82/01461 Sec. 371 Date Oct. 12, 1982 Sec. 102(e) Date Oct. 12, 1982 PCT Filed Oct. 12, 1982.A method of making a silicon nitride comprising object by use of a low density reaction bonded body is disclosed. An uncompacted mixture of silicon powder and a fluxing agent is heated in a nitrogen atmosphere to react the mixture with the atmosphere to form a body consisting essentially of silicon nitride and having a dimension greater than and a density less than the finished product. The nitrided mixture is then hot pressed to produce a silicon nitride comprising object of desired dimension and density, which material is useful as a cutting tool material for machining metals.