摘要
采用混合盐反应(MixedSaltReaction)原位合成法成功制备了TiB2/Al-4Cu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电镜观察其显微组织,结果表明,原位生成的TiB2颗粒非常细小,尺寸分布在0.1～1.5μm之间,平均尺寸为400nm,均匀分布于晶界处,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的,基体合金磨损机制以粘着磨损为主,复合材料磨损机制为磨粒磨损和轻微粘着磨损共同作用。
TiB2/Al-4.5Cu composites were prepared by 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)and SEM(scanning electron microscope).The results reveal that in-situ TiB2particle with fine grain size in range of 0.1～1.5 μm and average size of 400nm is uniformly distributed along grain boundary,obviously refining the microstructure of the composites.Dry sliding frictional and wear experiment at room temperature shows 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 co-action of abrasive wear with slight adhesive wear.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第10期942-945,共4页
Special Casting & Nonferrous Alloys
基金
中国航空科学基金资助项目(2007ZF56015)
江西省自然科学基金资助项目(2007GZC1500)
