Effect of particle size distribution on properties of zirconia ceramic mould for TiAl investment casting
来源期刊：中国有色金属学报(英文版)2011年第z2期
论文作者：CHEN Yan-fei XIAO Shu-long TIAN Jing XU Li-juan CHEN Yu-yong
文章页码：342 - 347
Key words：particle size distribution; investment casting; TiAl; zirconia ceramic mould; properties
Abstract: The effect of particle size distributions (PSDs) on the properties of zirconia ceramic mould for TiAl investment casting was described. The relationship between the zirconia powder characteristics and properties of the ceramic moulds was investigated. The particle size distribution, morphology of particles, viscosity of slurries, mechanical properties and fracture surfaces of ceramic moulds were examined. The effect of PSDs on the viscosity was observed through the measurement of slurries prepared from zirconia and binder. The morphology of the fracture surface of the zirconia moulds with different PSDs was also investigated. The measurement of bend strength shows that the mechanical behaviors of the green and fired zirconia ceramic moulds are comparable for all systems. The preliminary results illustrate that the PSDs play an important role in determining the quality of ceramic moulds and thus on the metallurgical quality of TiAl components produced by investment casting process.
CHEN Yan-fei, XIAO Shu-long, TIAN Jing, XU Li-juan, CHEN Yu-yong
(School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)
Abstract:The effect of particle size distributions (PSDs) on the properties of zirconia ceramic mould for TiAl investment casting was described. The relationship between the zirconia powder characteristics and properties of the ceramic moulds was investigated. The particle size distribution, morphology of particles, viscosity of slurries, mechanical properties and fracture surfaces of ceramic moulds were examined. The effect of PSDs on the viscosity was observed through the measurement of slurries prepared from zirconia and binder. The morphology of the fracture surface of the zirconia moulds with different PSDs was also investigated. The measurement of bend strength shows that the mechanical behaviors of the green and fired zirconia ceramic moulds are comparable for all systems. The preliminary results illustrate that the PSDs play an important role in determining the quality of ceramic moulds and thus on the metallurgical quality of TiAl components produced by investment casting process.
Key words:particle size distribution; investment casting; TiAl; zirconia ceramic mould; properties
