(哈尔滨工业大学复合材料研究所, 哈尔滨 150001)
摘 要: 采用SHS/PHIP工艺制备了致密的TiC-Al2O3-Fe复合材料。研究了Fe含量对燃烧温度、燃烧波速度、合成产物密实度及力学性能的影响。结果表明,燃烧波速度在一定Fe含量范围内出现一近似平台;密实度随Fe含量变化而变化,在Fe含量为10%时,产物的密实度最高,为99.4%;随着Fe含量的增加产物的抗弯强度不断提高,Fe含量为10%和30%时,抗弯强度分别为740 MPa和970 M Pa。
关键字: 自蔓延高温合成 准热等静压 TiC-Al2O3-Fe 材料性能
(Center for Composites Materials, Harbin Institute of Technology, Harbin 150001, P. R. China)
Abstract:The influence of Fe content on combustion temperature, combustion velocity, density and mechanical properties of TiC-Al2O3-xFe composites fabricated by SHS/PHIP was studied. The results show that the combustion velocity has an approximate plateau, when the content of Fe is between 20%~30%; the densities of products vary with content of Fe and reach up to the highest( i.e. 99.4%), when the content of Fe is 10%; the transverse rupture is increased with Fe content, e.g. when Fe contents are 10% and 30% the transverse rupture are 740 MPa and 970 MPa, respectively.
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