Kusukela ngekhulu lama-21, izitsha zobumba ezingangenwa izinhlamvu zithuthuke ngokushesha ngezinhlobo eziningi, okuhlanganisa i-Alumina, i-Silicon Carbide, i-Boron carbide, i-silicon Nitride, i-Titanium Boride, njll. Phakathi kwazo, i-Alumina Ceramics (Al2O3), i-Silicon Carbide ceramics (SiC) kanye ne-Boron Carbide Ceramics. (B4C) yizona ezisetshenziswa kakhulu.