Effect of TiN on the corrosion behavior of Y-(α + β)-sialon/TiN materials in hot hydrochloric acidic solutions

The corrosion behavior of Y-(α + β)-sialon/TiN materials in hot hydrochloric acidic solutions (80°C) was studied. The effect of TiN on the corrosion behavior of Y-(α + β)-sialon/TiN materials was investigated. The results revealed that the introduction of TiN accelerate the corrosion. With the increasing of TiN content, the α-sialon content on the final composition decreased and more yttrium remains on the grain boundary phase. Therefore, the corrosion was severed due to the formation of soluble YCl3.