"Slip casting and pressureless sintering of Ti<sub>3</sub>AlC<sub>2</su" by Yimin GONG, Wubian TIAN et al.

Article Title

Slip casting and pressureless sintering of Ti₃AlC₂

Authors

Yimin GONG, Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Wubian TIAN, Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Peigen ZHANG, Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Jian CHEN, Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Yamei ZHANG, Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Zhengming SUN, Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

Keywords

slip casting, pressureless sintering (PLS), properties, Ti3AlC2

Abstract

Slip casting and subsequent pressureless sintering (PLS) allow the preparation of complex-shaped and large-sized Ti₃AlC₂ components for many potential applications. The behaviors of the suspensions, green compacts, and sintered samples of Ti₃AlC₂ were studied in this paper. The optimized condition of 1 wt% of arabic gum as dispersant at pH = 10 results in a Ti₃AlC₂ suspension for slip casting Ti₃AlC₂ green compacts without macro defects or cracks. The sintering temperature and Al₄C₃ embedding powder are found to dominate the properties of the sintered Ti₃AlC₂ samples. The Ti₃AlC₂ sample sintered at 1450 ℃ for 1.5 h with Al₄C₃ embedding powder reaches the best properties, namely 95.3% relative density, hardness of 4.18 GPa, thermal conductivity of 29.11 W·m^-1·K^-1, and electrical resistivity of 0.39 μΩ·m. The findings in this work may pave the way for the application of MAX phases with large size and complex shape.