Interfacial microstructure evolution in aluminium matrix composites reinforced with unoxidized and oxidized SiC particles
Interfacial microstructure evolution in aluminium matrix composites reinforced with unoxidized and oxidized SiC particles
复制标题
未氧化和氧化 SiC 颗粒增强铝基复合材料的界面微观结构演变
DOI：
10.1002/sia.1064
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Jae
中科院分区：
文献类型：
--
作者：
Zhong;Shijiro Ochiai;M. Gu;M. Hojo;Jae
使用 X 射线衍射、场发射扫描电子显微镜 (FE-SEM) 和透射电子显微镜 (TEM) 研究了以非氧化和氧化 SiC 颗粒作为增强体的铝基复合材料的界面微观结构演变。六方片状Al4C3和Si是非氧化SiC颗粒增强铝基复合材料（SiCp/Al）中的两种主要界面反应产物。此外，在最后凝固阶段，共晶 θ-CuAl2 和 Si 相在 SiCp/基体界面处析出。观察氧化SiC颗粒与含Mg铝合金之间的界面反应表明，SiO2层与SiC和Al基体均具有良好的结合，并且初步形成了MgO纳米颗粒。当基体中 Mg 含量较低（≤2 wt.%）时，MgO 颗粒将转变为八面体 MgAl2O4 晶体；当基体中 Mg 含量较高（≥4 wt.%）时，MgO 颗粒将保持为 MgO。版权所有 © 2001 约翰·威利父子有限公司
Interfacial microstructure evolution of Al matrix composites with non‐oxidized and oxidized SiC particles as reinforcement was investigated using x‐ray diffraction, field emission scanning electron microscopy (FE‐SEM) and transmission electron microscopy (TEM). Hexagonal platelet‐shaped Al4C3 and Si are the two major interfacial reaction products in the non‐oxidized SiC‐particle‐reinforced Al matrix composites (SiCp/Al). In addition, the eutectic θ‐CuAl2 and Si phases precipitate at the SiCp/matrix interface during the last solidification stage. Observation of the interfacial reaction between the oxidized SiC particles and Al alloy containing Mg shows that the SiO2 layer has good bonding with both SiC and Al matrix and that nanoparticles of MgO have formed initially. The MgO particles will change into octahedral MgAl2O4 crystals when there is a low Mg content in the matrix (≤2 wt.%) and will remain as MgO when there is a high Mg content (≥4 wt.%). Copyright © 2001 John Wiley & Sons, Ltd.