Pore-created silicon carbide (SiC) ceramics were liquid phase sintered (LPS) by using Al 2 O 3 –Y 2 O 3 as sintering additive and calcium chloride (CaCl 2 ) as pore former. The CaCl 2 did not react with other compositions, and accumulatively formed CaCl 2 crystals on the grain boundary of SiC ceramics. The addition of CaCl 2 decreased the sintering and mechanical properties of SiC ceramics, but obviously reduced the dry friction coefficient. The pores on the surface and inside of SiC ceramics could be continuously created by the solubility and non-volatility of calcium chloride.
