Hardness evaluates a material's capability to resist mechanical use and abrasion. Alumina ceramics surpass metal and tungsten carbide applications in hardness. On the Rockwell hardness scale, alumina ceramics range from HRA80-90, putting them just under diamonds and earlier mentioned chrome steel. ZERODUR® glass-ceramic has become among SCHOTT's most unique and https://franzp612rsi6.wikisona.com/user