... 3) is 1.52 Polymorphs is cube The main features of Micrometer silicon carbide, ultra-fine silicon carbide powder prepared ... properties, high thermal conductivity (165W/MK), coefficient of thermal expansion small, high hardness, Mohs hardness of 9.5, microhardness 2840 3320kg/mm2 is ... the first of the material wear additives, its hardness between corundum and diamond ...