Evaluation of corrosion resistance of β-sialon nano ceramics

Abstract

In our previous work, we synthesized β-sialon nano powders by carbothermal reduction-nitridation of SiO₂-Al₂O₃ mixture, and fabricated β-sialon nano ceramics using it by spark plasma sintering method. The purpose of this study is to evaluate its corrosion resistance in various aqueous solutions. The relative density of the sintered body was over 99% under firing condition of 1800.C, 5min. As a result of corrosion test, it was found to be better corrosion resistance in H₂SO₄ than commercial Si₃N₄ ceramics.