C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/128
C04B 35/58 (2006.01) C04B 35/00 (2006.01) C04B 35/571 (2006.01) C04B 35/575 (2006.01) C04B 35/589 (2006.01) C04B 35/593 (2006.01) C04B 35/64 (2006.01) D01F 9/10 (2006.01)
Patent
CA 1328346
METHOD FOR DENSIFICATION OF AMORPHOUS CERAMIC MATERIAL ABSTRACT The elastic modulus and density of an amorphous, ceramic article derived from a resinous organosilicon polymer and having a composition consisting essentially of silicon, nitrogen and/or carbon are increased while substantially maintaining or improving tensile strength by heat treating the ceramic article at an elevated temperature under super- atmospheric nitrogen pressure to increase its density while avoiding crystallization. During heat treatment, at least some of the conditions of time, temperature, heating rate, cooling rate, pressure and atmosphere are controlled to minimize erosion of the article which could otherwise occur due to the loss to the surrounding atmosphere, as a gas or gaseous component, of at least one of nitrogen, silicon and carbon. The heat treated, ceramic article is amorphous and non-crystalline and has a density substantially greater than 2.5 g/cc together with desirable values of tensile strength and elastic modulus.
581252
Jones Richard E.
Lipowitz Jonathan
Rabe James A.
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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