原位自生锌基复合材料零件的力学损伤研究  

Study on Mechanical Damage of Zinc-based Composites by In Situ Crystallization Technique

作　　者：李少文 

机构地区：[1]陕西航空技师学院,陕西汉中723213

出　　处：《机械管理开发》2012年第4期62-63,共2页Mechanical Management and Development

摘　　要：采用重力铸造工艺制备了原位自生硅相增强高铝锌基复合材料。应用光学金相显微镜、扫描电子显微镜、拉伸试验等手段研究了复合材料的显微组织、断口形貌特征和力学损伤机理。结果表明:硅相含量越大,抗拉强度越小,复合材料的力学损伤越明显;复合材料的断裂裂纹主要起源于缩孔和疏松处。The silicon particles reinforced zinc-based composite materials by in situ crystallization technique were fabricated using gravity casting technique.The microstructure,fracture surface and mechanical damage mechanism of composite materials were studied by the metal- lurgical microscope, （SEM） and tensile test.The results show that the tensile strength of composite materials decrease with the increasing of silicon content, mechanical damage of composite materials increase with the increasing of silicon content, and fracture of composite materials mainly originated from shrinkage and loose.

关 键 词：原位自生 锌基复合材料 力学损伤 断口形貌 

分 类 号：TG146.13[一般工业技术—材料科学与工程]