Effect of Nanosized AI203 as Additive on the Sintering Characteristics and Vickers Hardness of AI2O3/Si3N4 Compound Ceramics

摘要：

In order to enhance the density and decrease the sintering temperature, Al2O3Si3N4 compound ceramics were sintered by pressureless using β- Si3N4 as raw materials and Al2O3 as sintering additives. The effects of Al2O3 as additive on the Vickers hardness and the sintering characteristic of Al2O3/Si3N4 compound ceramics were studied. The results shows that adding 9-15％ nano- Al2O3 can get Al2O3/Si3N4 compound ceramics only in 1650℃ by pressureless sintering because of nano- Al2O3 sintered. As a consequence, the relative density increases from 89％ with micro alumina to above 97％ with nano- Al2O3, the Vickers hardness increases from 1043.5MPa to 1356.0 MPa.

关键词： AI2O3/Si3N4 compound Ceramics Nanosized Al2O3 Sintering Characteristics Vickers hardness

作者: Huifang Wang Shiming Hao Yubao Bi Renhong Yu

作者单位: High Temperature Materials Institute. Henan University of science and technology,Luoyang Henan P. School of Physics and Engineering,Henan University of science and technology,Luoyang Henan P. R. Chi High Temperature Materials Institute.Henan University of science and technology,Luoyang Henan P. R.

会议类型: 国际会议

会议名称: the 2011 International Conference on Key Engineering Materials(ICKEM 2011)(2011关键工程材料国际会议)

会议地点: 三亚

会议语种:英文

页码: 178-181

在线出版日期: 2011-03-25（万方平台首次上网日期，不代表论文的发表时间）