湖南大学学报（自然科学版）2016，Vol.43Issue(6)：1-9,9.
2024Al／Gr／SiCp复合材料耐热性能研究
Heat Resistant Properties of the 2024Al/Gr/SiCp Hybrid Composites
摘要
Abstract
The high temperature tensile properties and room‐temperature mechanical properties of 2024Al/Gr/SiCp hybrid composites after long time thermal exposure were studied . The fractures of 2024Al/Gr/SiCp hybrid composites after a long time of thermal exposure at different temperatures were ob‐served by SEM .The results show that the mechanical properties of 2024Al/Gr/SiCp hybrid composites de‐crease slightly with the increase of exposure time at 200 ℃ .The 2024Al shows a greater decline of me‐chanical properties than the composites ,which is attributed to the addition of SiCp particles and flaky graphite .T he mechanical properties of the materials decrease rapidly due to the coarsening of precipitates and grain .The tensile strength at elevated temperatures decreases with the increase of test temperature . The 2024Al is characterized by ductile fracture ,while the composites are characterized by the ductile frac‐ture of matrix ,the tearing of the graphite and the interface between the particles and matrix .关键词
2024Al/Gr/SiC复合材料/热暴露/耐热性能/断裂机制Key words
2024Al/Gr/SiCp hybrid composites/thermal exposure/heat resistant properties/fracture mechanism分类
矿业与冶金引用本文复制引用
严红革,胡程进,陈吉华,苏斌..2024Al／Gr／SiCp复合材料耐热性能研究[J].湖南大学学报（自然科学版）,2016,43(6):1-9,9.基金项目
高等学校博士学科点专项科研基金资助项目 （）
