铝热法制备的ZrO_2/Al_2O_3复相陶瓷材料组织和力学性能  

Microstructure and mechanical properties of ZrO_2/Al_2O_3 composite ceramics prepared with aluminothermic reaction

作　　者：喇培清[1] 申达[1] 刘雪梅[1] 卢学峰[1] 魏玉鹏[1] 王鸿鼎[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2011年第3期7-10,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(50674051)

摘　　要：通过铝热反应制备ZrO2/Al2O3复相陶瓷材料,研究ZrO2含量对复相陶瓷显微组织与力学性能的影响.结果表明:复相陶瓷的相组成为ZrO2和Al2O3.随着ZrO2含量增加,ZrO2在基体中的分布越均匀,维氏硬度为8～15GPa,在ZrO2质量分数为41.5%时呈现最大值为14.85GPa;断裂韧性先增加后降低,在ZrO2质量分数为30%时呈现最大值8.01MPa.m1/2.ZrO2/Al2O3 composite ceramics were prepared by means of aluminothermic reaction.The effects of ZrO2 content on their microstructure and mechanical properties were investigated.The result showed that the composite ceramics consisted of ZrO2 and Al2O3 phase.The distribution of ZrO2 in the matrix would be more homogenous with ZrO2 content increasing.Vickers hardness values were in the range from 8 to 15 GPa and its maximum value was 14.85 GPa when ZrO2 content was 41.5%.Fracture toughness increased firstly and then decreased,its maximum value being 8.01 MPa·m^1/2 when ZrO2 content being 30%.

关 键 词：ZrO2/Al2O3复相陶瓷 显微组织 力学性能 

分 类 号：TQ174[化学工程—陶瓷工业]