| 摘要 |
A process for the sintering of a body comprising silicon carbide and a boron-containing material, which comprises heating the body to an effective sintering temperature in the presence of nitrogen; removing the nitrogen by evacuation to a pressure of less than 10-2 mbar; and continuing the sintering under vacuum or in the presence of an inert gas other than nitrogen. The invention also describes a sintered body comprising silicon carbide and a boron-containing material, having a density of at least 96% of its theoretical maximum density, in which the body contains less than 0.7% w of free carbon, and has a mean silicon carbide grain size of less than 5 microns.
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