Study on Thixo-Die-Forging of 37vol.％Al/Al2O3 Composite in Pseudo-Semi-Solid State
A new procedure, thixo-die-forging of ceramics/metal composite in the pseudo-semi-solid state, has been proposed based on powder metallurgy combining with the semi-solid processing of metal. The cup-shaped parts of Al/Al2O3 composite are processed with thixo-die-forging. By metallographic analysis and performance tests, the results show that microstructures are compact, grains are fine and mechanical properties are excellent. The bend strength and fracture toughness of 37vol.％Al/Al2O3 are about 430-690MPa and 8.5-16.8 MPa·m1/2 respectively. Comparing with those of the reaction in situ and high temperature oxidation procedures, the bend strength increases by 50％ and 80％, and fracture toughness increases by 29％ and 55％, respectively. The results also show that the processing parameters, such as temperature and pressure have great influences on the properties. Thixo-die-forging in the pseudo-semi-solid state can prepare Al/Al2O3 composite with high performance.
Thixo-die-forging Pseudo-semi-solid state Ceramics/metal composites Bend strength Fracture toughness
CHENG Yuan-sheng
School of Materials Science & Engineering 435＃, Harbin institute of technology, 150001, PR China
国际会议
青岛
英文
11-14
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）