粉末冶金法制备新型Si-Al-Ti体系复合材料的研究  

Study on Novel Si-Al-Ti System Composite Prepared by Powder Metallurgy

作　　者：高飞[1] 李新星[2] 杨子润[3] 潘虹 周海[1] GAO Fei;LI Xinxing;YANG Zirun;PAN Hong;ZHOU Hai(School of Mechanical Engineering, Yancheng Institute of technology, Yancheng 224051, China;Suqian College, Suqian 223800, China;School of Material Science and Engineering, Yancheng Institute of technology, Yancheng 224051, China)

机构地区：[1]盐城工学院机械工程学院,江苏盐城224051 [2]宿迁学院,江苏宿迁223800 [3]盐城工学院材料工程学院,江苏盐城224051

出　　处：《热加工工艺》2018年第6期133-136,共4页Hot Working Technology

基　　金：江苏省第十三批“六大人才高峰”高层次人才项目(XCL-199);江苏省材料摩擦学重点实验室开放研究课题(Kjsmcx201302)

摘　　要：采用了Si-Al-Ti体系,通过粉末冶金法制备出Si/Al3Ti复合材料。利用X射线衍射仪、扫描电子显微镜等对复合材料进行了物相分析及显微组织观察。结果表明：通过粉末冶金法可以制备出较高致密度的Si/Al3Ti复合材料,复合材料的物相主要为Si和Al3Ti,增强相Al3Ti与基体Si相很好地结合在一起。Si/Al3Ti复合材料在腐蚀初期主要表现为典型的点腐蚀特征,随着腐蚀时间的延长,可能出现一定程度的缝隙腐蚀。150℃以下磨损机制以磨粒磨损为主,300℃时磨损机制转变为粘着磨损和氧化磨损。Si/Al3Ti composite was fabricated by powder metallurgy technology through Si-AI-Ti system. The phases and microstructures of the composite were observed by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The results show that Si-Al3Ti composite with high density is successfully fabricated by powder metallurgy technology. The main phases are Si and A13Ti. The strengthening phase A13Ti bonds with the matrix Si well. At the initial stage of corrosion, the corrosion type is the typical pitting corrosion. With the time increasing, some degree of crevice corrosion appears. When the temperature is below 150 ℃, abrasive wear was the dominant wear mechanism. When the temperature increases to 300 ℃, the wear mechanism changes into adhesive wear and oxidation wear.

关 键 词：Si-Al-Ti体系 微观组织 盐雾腐蚀 磨损 

分 类 号：TB333[一般工业技术—材料科学与工程]