【摘要】 通过Ｘ－射线衍射、光学显微检验和扫描电子显微镜观察，研究了由Ａｌ－Ｍｇ－Ｓｉ合金高温直接氧化形成的ＳｉＣ／Ａｌ２Ｏ３／Ａｌ－Ｓｉ复合材料的相组成和显微结构，分析了工艺参数和材料显微结构对其力学性能的影响。实验结果表明，材料抗弯强度可高达５００ＭＰａ、断裂韧性达５．０８ＭＰａ·ｍ１２，致密度高达９８．４１％。更多还原

【Abstract】 This paper studies the composition and microstructure of SiC/Al 2O 3/Al-Si composite formed from the oxidized Al-Mg-Si alloy at a high temperature through X-ray diffraction (XRD), optical micrography and scanning electron microscope (SEM), and analyzes the effects of the technological process and the material microstructure on its mechanical properties. The experimental results show that its bending strength of the material is up to 500 MPa, fracture toughness up to 5.08 MPa·m -1/2 , and compactness up to 96.41%.更多还原