SUN Yuanyuan 1 TANG Huidong 1 LI Longzhu 1 WANG Fen 2
(1. Department of Materials Engineering Technology, Changzhou Institute of Engineering Technology, Changzhou 213164;
2. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021)
Abstract:Influence of firing method and firing temperature on phase composition and microstructure of Al2O3 -hBN self -lubricating multi-phase ceramic material was researched. The result showed the material was very loose after pressureless firing. The pressure and liquid during hot-pressing can destroy the cardhouse structure formed by growing h-BN sheets,promote their orientation arrangement, reduce the porosity and increase the density of the material. Al2O3/h -BN self -lubricating multi-phase ceramic material was difficult to be sintered and needed high-temperature hot pressing because ofthe cardhouse structure of h-BN. The hot pressing temperature was initially determined to be between 1700~1800℃.
Keywords:Al2O3/h-BN multi-phase ceramic, self-lubricating, hot pressing