Fabrication of Ti_2AlC by Spark Plasma Sintering from Elemental Powders and Thermodynamics Analysis

• 作 者: 王苹
• 机 构: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2007年02期
• 关键词: thermodynamics spark carbide Sintering layered sintered calculating pressing sin

A ternary-layered carbide Ti 2 AlC material could be synthesized by spark plasma sintering(SPS)technology using elemental powder mixture of Ti,Al and active carbon.By means of XRD and SEM,phases were identified and microscopically evaluated.The experimental results show that the main phase in the product was fully crystallized Ti 2 AlC with small particle size when sintered at 1200 C.The syn-thesis temperature of SPS was 200-400 C lower than that of hot pressing(HP)or hot isostatic pressing(HIP). Through thermodynamics calculations,the mechanism of Ti 2 AlC was studied by calculating changes of Gibbs free energy of reactions.

A ternary-layered carbide Ti 2 AlC could could be synthesized by spark plasma sintering (SPS) technology using elemental powder mixture of Ti, Al and active carbon.By means of XRD and SEM, phases were identified and microscopically as.The experimental results show that the main phase in the product was fully crystallized Ti 2 AlC with small particle size when sintered at 1200 C. The syn-thesis temperature of SPS was 200-400 C lower than that of hot pressing (HP) or hot isostatic pressing (HIP Through thermodynamics calculations, the mechanism of Ti 2 AlC was studied by calculating changes of Gibbs free energy of reactions.