Microstructure and Properties of Al2O3-ZrO2(n) Composite Ceramics Prepared by Microwave Sintering
Al2O3-ZrO2(n) composite ceramics were prepared by microwave sintering. The properties and microstructure were investigated,including vickers hardness,fracture toughness,bending strength,wear resistance and heat-shocking resistance. The results show that the properties and microstructure of alumina matrix ceramics are affected by the addition of nano-ZrO2 particles. When the content of ZrO2 is 15vol％,the hardness,fracture toughness and bending strength of the Al2O3-ZrO2 composites reach maximum values 13350MPa,6.41MPa·m1/2 and 502MPa, respectively. The wear resistance of alumina matrix ceramics are improved only on the condition of adding an appropriate amount of nano-ZrO2. The wear mechanism of the composites are abrasive particle wear and adhesion wear co-existing. The crack propagation rate of Al2O3 matrix ceramics decreases remarkably with the addition of nano-ZrO2 particles. The mechanisms of ZrO2 improving the heat-shocking resistance of alumina matrix ceramics are mainly phase transfer toughening. Nano-ZrO2 particles exist in the intragranular and grain boundary of alumina matrix ceramics,and exist intragranular structures.
Microwave sintering Al2O3-ZrO2(n) composite ceramics Microstructure Properties
He Wen Ai Yunlong Liu Changhong Zhang Jianping Ding Jiayuan
Center of Analysis and Measurement,Nanchang Hangkong University,Nangchang 330063,China School of Material Science and Engineering,Nanchang Hangkong University,Nangchang 330063,China School of Material Science and Engineering,NanchangHangkong University,Nangchang 330063,China
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
364-368
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）