Borkarbide (Boron Carbide, German) German term for B₄C, a superhard material for armor and industrial wear parts. #B4C #GermanTech #Superhard https://www.advancedceramics.co.uk/blog/key-factors-determining-the-quality-of-single-crystal-silicon-purity-bubbles-and-crystallization-of-quartz-crucibles/