SiC_p颗粒增强耐热铝基复合材料孔隙率与力学性能  

The relationship of viscosity and properties of SiC_p particulates reinforced heat resistant alumina matrix composites

作　　者：李云平[1] 李溪滨[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《中南工业大学学报》2002年第2期177-180,共4页Journal of Central South University of Technology(Natural Science)

基　　金：国家"九五"科技攻关计划项目 (95 YS 0 10 )

摘　　要：通过真空热压、热挤压工艺制备的SiCp Al Fe V Si复合材料 ,在室温和高温时的强度均高于基体材料在室温和高温时的强度 :SiCp 体积分数分别为 5 % ,10 %和 15 %时 ,复合材料Al Fe V Si在室温时的断裂强度分别比基体材料的断裂温度增加了 4 8.2 % ,6 3.3% ,2 4 .4 % ;在 4 0 0℃时其断裂强度分别比基体的断裂强度增加了 4 9.6 % ,5 3.3% ,19.0 % .复合材料随着SiCp 含量的增加而使孔隙率增加 ,导致材料力学性能的增加幅度降低 .此外 ,通过分析材料力学性能与材料孔隙率的关系 ,研究了SiCp Al Fe V Si复合材料的颗粒强化机制与材料孔隙率交互作用机理 ,得出了复合材料孔隙率θ ,φ(SiCp)与材料断裂强度σ1b 的关系 。The strengths of SiC p/Al Fe V Si at different temperatures are higher than that of the matrix, the composites were produced by vacuum hot pressing and hot extrusion. The tensile strengths of three kinds of composites 5% SiC p/Al Fe V Si, 10% SiC p/Al Fe V Si, 15%SiC p/Al Fe V Si are increased by 48.2%, 63.3%, 24.4% at ambient temperature, and increased by 49.6%, 53.3%, 19.0% at 400 ℃ respectively. The authors have also studied interaction of strengthening mechanism of SiC p with material and the viscosity produced by SiC p. The relationship of content of SiC p, viscosity ( θ ) and the tensile strength of material ( σ 1 b) was studied, which would be of great importance in research and production.

关 键 词：SiCp颗粒增强耐热铝基复合材料 力学性能 热挤压 孔隙率 

分 类 号：TB333[一般工业技术—材料科学与工程]