摘要
研究了喷射沉积ＳｉＣｐ／ＬＹ１２复合材料的室温及高温拉伸性能。体积分数为１５％的复合材料经热挤压和热处理后，室温弹性模量、抗拉强度和屈服强度均有提高，但延伸率下降，高温抗拉强度和弹性模量则显著提高。分析了复合材料室温拉伸性能实验值与理论值的差异，讨论了孔隙率和颗粒分布对拉伸性能的影响。
Tensile properties of spray codeposited SiCp/2024Al composites at room and high temperatures have been investigated. After hot extrusion and heat treatment, the composites with 15% volume fraction exhibited much higher elastic modulus, better tensile and yield strength, but lower elongation than aluminum matrix. The tensile strength and elastic modulus of the composites at high temperatures increased remarkably over those of the matrix. The discrepancy of the room temperature tensile properties between the calculated and the experimentally determined values of the composites with different volume fractions was analysed, and the effects of porosity and particle distributions on the tensile properties were also discussed.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1997年第3期375-378,共4页
Acta Aeronautica et Astronautica Sinica
基金
航空科学基金
国防科工委"八五"预研资助
