Product made from silicon carbide for shielding

摘要

A product obtained by solid-phase sintering of a silicon carbide powder and of a sintering additive, the product having a relative density of greater than 98.5% and including: more than 92% by weight of SiC present in the form of grains, less than 2% by weight of elemental oxygen, less than 6% by weight, in total, of other elements, wherein more than 10% by number of the SiC grains, on the basis of the total number of the grains, have an elongation factor F of greater than 3 (F>3), wherein more than 50% by number of the grains, the elongation factor F of which is greater than 3, have a width of greater than 3 micrometers, and wherein the other SiC grains in the product have a mean equivalent diameter of greater than 1 micrometer and less than 20 micrometers.

主权项

1. A product obtained by solid-phase sintering of a silicon carbide powder and of a sintering additive, said product having a relative density of greater than 98.5% and comprising:
more than 92% by weight of SiC present in the form of grains, less than 2% by weight of elemental oxygen, and less than 6% by weight, in total, of other elements,wherein:
more than 10% by number of the SiC grains, on the basis of a total number of said SiC grains, have an elongation factor greater than 3, more than 50% by number of said SiC grains, the elongation factor of which is greater than 3, have a width of greater than 3 micrometers, and a remaining number of SiC grains, of the total number of said SiC grains, in said product have a mean equivalent diameter greater than 1 micrometer and less than 20 micrometers and the number of SiC grains having an elongation factor greater than 6 is less than 7%, and wherein the product has an aluminum content that is less than 1000 ppm relative to the weight of said product.