Mg/Al液固双金属复合材料的界面及相组成  

Interface and phase constituent of Mg/Al liquid-solid bimetal composite

作　　者：赵成志[1] 李增贝 张贺新[1] 杜德顺[1] 符策鹄 余娇娇[1] 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2014年第11期1446-1450,共5页Journal of Harbin Engineering University

基　　金：中央高校基本科研业务专项资金资助项目(HEUCF201403004);哈尔滨市成果转化基金资助项目(2013DB4AG009)

摘　　要：针对单一镁合金耐蚀性差的问题，利用液固复合法制备了Mg／Al双金属复合材料，采用光学显微镜（OM）、扫描电镜（SEM）、能谱分析（EDS）以及X射线衍射（XRD）对材料界面组织和相组成进行了分析。试验结果表明：当以AZ91D为浇注金属，浇注温度为660～680％时，炉冷、双金属AZ91D和Z1105可获得良好的冶金结合界面；合金界面共分为5个明显区域，镁合金基体侧为Mg基固溶体和Mg17Al12,铝合金基体侧为铝基固溶体和Al3Mg2，界面中间区域则为Al3Mg2和弥散析出的中间相Mg2Si。In order to solve the problem of poor corrosion resistance of the single magnesium material, the Mg/Al bimetal composite was prepared by the liquid-solid compound processing method. The interface and phase constituents of this composite were analyzed by optical microscope （ OM）, scanning electron microscope （ SEM）, energy dispersive spectrometer （EDS）, and X-ray diffraction （XRD）. The test results indicated that AZ91D and ZL105 can combine well when AZ91D is used as the molten metal. This is achieved by setting pouring temperature in the range from 660℃ to 680℃ and then cooling in the furnace. There are five new phase layers in the interface transition zone ： the Mg-based layer is composed of solid solution of Mg and Mg17Al12, the Al-based layer is composed of solid solution of Al and A13Mg2, and in the middle of layer there are Mg2Al3 and precipitated middle phased Mg2Si.

关 键 词：Mg/Al双金属 复合材料 液固复合法 界面结合 显微组织 

分 类 号：TB331[一般工业技术—材料科学与工程]