Selective oxidation behavior of an ignition-proof Mg-Y-Ca-Ce alloy
来源期刊：JOURNAL OF RARE EARTHS2013年第10期
论文作者：周娜 章桢彦 董杰 靳丽 丁文江
文章页码：1003 - 1008
摘 要：A Mg-Y-Ca-Ce magnesium alloy was optimized for high ignition-proof property,which did not burn in air at 1233 K up to30 min.Oxidation behavior of the alloy was investigated by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,and thermodynamics calculation at 673,773 and 873 K.XRD and SEM analysis indicated that dense and compact oxide films composed of MgO,Y2O3and CaO formed.The oxidation behavior was characterized by the selective oxidation.Based on Pilling-Bedworth ratio（PBR）and energy dispersive spectrometer（EDS）analysis,Y2O3contributed more to form the compact surface oxide film,which led to the excellent ignition-proof performance.The thermodynamics analysis and EDS results implied that the Y-rich areas were preferred paths for the selective oxidation.
周娜1，章桢彦1，董杰1，靳丽1，丁文江1,2
1. National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University2. Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University
摘 要：A Mg-Y-Ca-Ce magnesium alloy was optimized for high ignition-proof property,which did not burn in air at 1233 K up to30 min.Oxidation behavior of the alloy was investigated by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,and thermodynamics calculation at 673,773 and 873 K.XRD and SEM analysis indicated that dense and compact oxide films composed of MgO,Y2O3and CaO formed.The oxidation behavior was characterized by the selective oxidation.Based on Pilling-Bedworth ratio（PBR）and energy dispersive spectrometer（EDS）analysis,Y2O3contributed more to form the compact surface oxide film,which led to the excellent ignition-proof performance.The thermodynamics analysis and EDS results implied that the Y-rich areas were preferred paths for the selective oxidation.
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