Fabrication of TiAl Intermetallic by Spark Plasma Sintering
The γ-TiAl intermetallic compounds were produced at the temperature ranging from 850°C to 1050°C by the Spark Plasma Sintering (SPS) process. The effects of sintering temperature and holding time on the mechanical properties of γ-TiAl intermetallic compounds were investigated. The γ-TiAl intermetallic compounds sintered at 1050°C for 10 min showed a high relative density more than 98%, and had the best three-point bending strength of 643MPa, fracture toughness of 12 MPa·m1/2 and microhardness of 560MPa. The microstructural observations indicated typical characteristics of intergranular fracture, which meant the poor ductility of γ-TiAl intermetallic compounds.
Wei Pan and Jianghong Gong
H. T. Wu et al., "Fabrication of TiAl Intermetallic by Spark Plasma Sintering", Key Engineering Materials, Vols. 336-338, pp. 1050-1052, 2007