MA Guanghua, WANG Yongqin

( Jingdezhen Ceramic Institute)

Abstract: In the paper, the study on and the progress in toughened and reinforced silicon nitride ceramics are expounded, and the conventional avenues to tough silicon nitride ceramics are commented such as dispersion toughing, fiber reinforcing, phase transformation toughing, self toughing and lamellar compound toughing .Finally the avenues and direction are pointed out to toughen silicon nitride ceramics .

Key words: silicon nitride ceramics dispersion tougherning, fiber reinforcing, phase transformation toughening, self toughening, lamellar compound tougherning