期刊论文

Study on flexural properties of Al2 O3 /Ti2 AlN composite materials

中文

武汉轻工大学学报

2095-7386

2019

38

2

31-34

10.3969/j.issn.2095-7386.2019.02.006

武汉轻工大学校立科研项目(2016y07).

本校为第一机构

采用真空热压法原位形成强化相Al2O3,制备出Al2O3颗粒增强Ti2AlN基复合材料。对热压态复合材料样品在不同温度下的弯曲性能进行了测试,研究了不同的应变速率对弯曲性能的影响。随着温度的升高,弯曲强度从室温的580 MPa降低到1 200℃的10 MPa,表现出优越的高温变形能力。在压头位移速率小于0. 5 mm/min时,应变速率敏感因子m值为0. 24,在压头位移速率大于0. 5 mm/min时,m值为0. 68。

Al2O3 /Ti2 AlN composites were prepared by vacuum hot pressing, by which Al2O3 particles as strengthening phase were in situ formed. In this paper, the flexural properties of hot-pressed composites at different temperatures were tested, and the effects of different strain rates on the flexural properties were studied. With the increase of temperature, the bending strength decreases from 580 MPa at room temperature to 10 MPa at 1200 ℃, showing superior high temperature deformation ability. When the head displacement rate is less than 0.5 mm/min...