ZrO2\mathrm{ZrO}_{2}ZrO2
Al2O3\mathrm{Al}_{2} \mathrm{O}_{3}Al2O3
Ni−As\mathrm{Ni}-\mathrm{As}Ni−As
Ni−Cr\mathrm{Ni}-\mathrm{Cr}Ni−Cr