气压浸渗法制备Al_2O_(3(sf))/Al复合材料的缺陷分析

Analysis on Defects of Al_2O_(3(sf)) /Al Composite Prepared by Gas Pressure Infiltration

采用气压液态金属浸渗法制备了Al2O3(sf)/Al复合材料,通过X射线衍射仪、能谱仪、扫描电镜等研究手段对材料微观缺陷进行观察分析。研究表明,影响Al2O3(sf)/Al复合材料力学性能的主要因素有:在材料制备过程中,纤维不均匀分布造成的团聚;基体合金在加热过程中析出的Mg2Si相以及熔融金属液在浸渗预制体时所产生的显微缩孔及气孔。

Al2O3（s f） /Al composite was prepared by gas pressure infiltration.The fracture morphology and microstructure of the composite was investigated by X-ray diffraction,energy dispersive spectrometer and scanning electron microscope.The results indicate that the main effect factors on the mechanical properties of the composite are the void and micro-pore,the short fibers dispersing in-homogeneously and Mg2Si phase producing from matrix alloys.