【摘要】 本文研究了Al₂O₃、Y₂O₃、La₂O₃、Y₂O₃+SiO₂几种类型的添加剂对AIN陶瓷力学性能和高温抗氧化性能的影响。结果表明:Y₂O₃+SiO₂为一种较好的AIN陶瓷添加剂;材料在烧结过程中由于2H⁶Sialon及8H—Sialon等纤维状的Sialon相形成,对材料起到一种自补强作用;SiO₂的存在使AIN陶瓷在氧化过程中形成Mullite保护层,故使AIN陶瓷具有良好的力学性能及高温抗氧化性能。更多还原

【Abstract】 The effect of Al₂O₃、Y₂O₃、La₂O₃、Y₂O₃+SiO₂ additives on the mechanical properties and oxidation resistances of AIN ceramics was investigated in this paper. It was found that Y₂O₃+SiO₂ was a good additive of AIN ceramics. The fibrous phases such as 2H^δ Sialon and 8H—Sialon formed in the sintering of AIN ceramics have the effect of self—reinforcement. The existence of SiO₂ made AIN ceramics form the Mullite propective layer in oxidizing. So, AIN ceramics have the good mechanical properties and high temperature oxidation resistances.更多还原