作　　者： ; ; ; ;

机构地区： 上海交通大学材料科学与工程学院金属基复合材料国家重点实验室

出　　处： 《特种铸造及有色合金》 2012年第3期216-219,共4页

摘　　要： 采用混合盐反应(MixedSaltReaction)原位合成法成功制备了TiB2/2014Al复合材料,并对其摩擦磨损性能进行了研究。采用X射线衍射分析物相和扫描、透射电镜观察了其微观组织。结果表明,原位生成的TiB2颗粒非常细小,尺寸小于1μm,内生TiB2颗粒分布均匀,明显细化了复合材料组织。室温干滑动摩擦磨损试验表明,复合材料耐磨性高于基体合金,基体合金磨损机制以粘着磨损为主,复合材料的磨损机制为典型的磨粒磨损。 2014A1/TiB2 composites were fabricated by a mixed salt reaction in-situ synthesis process, and friction and wear properties of the composites were investigated. Microstructure of the composites was observed by XRD （X-ray diffraction）, SEM （scanning electronic microscope） and TEM （transmission e- lectronic microscope）. The results reveal that in-situ TiB2 particle is very fine with grain size smaller than ltzm and uniform distribution in the composites, obviously refining the microstructure of the com- posites. Dry sliding frictional and wear experiment at room temperature show that wear resistance of the composites is evidently superior to that of matrix alloy. Wear mechanism of matrix alloy is characterized by adhesive wear, and wear mechanism of the composites is characterized by typical abrasive wear.

关 键 词： 原位合成 复合材料 组织 耐磨性能

领　　域： [一般工业技术] [金属学及工艺] [一般工业技术] [金属学及工艺]