| http://www.w3.org/ns/prov#value | - Examples of materials for the aggregate include, in addition to the SiC of the examples below, carbon, graphite, silicon nitride, boron, boron/tungsten, boron carbide/tungsten, boron nitride, beryllium, fused silica, mullite, glass, borosilicate, and oxides, nitrides, carbides, and borides such as zirconia, boron carbide, silicon carbonitride alumina and aluminum silicate (mullite) and combination
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