Selective oxidation behavior of an ignition-proof Mg-Y-Ca-Ce alloy

被引：35

作者：

Zhou Na ^{[1
]}

Zhang Zhenyan ^{[1
]}

Dong Jie ^{[1
]}

Jin Li ^{[1
]}

Ding Wenjiang ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Key State Lab Met Matrix Composite, Shanghai 200240, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2013年 / 31卷 / 10期

基金：

中国国家自然科学基金;

关键词：

magnesium; alloying; ignition-proof; oxidation behavior; thermodynamics; rare earths; MAGNESIUM; RESISTANCE; ADDITIONS; CERIUM; BERYLLIUM; ALUMINUM;

D O I：

10.1016/S1002-0721(13)60021-6

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

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 to 30 min. Oxidation behavior of the alloy was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermodynamics calculation at 673, 73 and 873 K. XRD and SEM analysis indicated that dense and compact Oxide films composed of MgO, Y2O3 and CaO formed. The oxidation behavior was characterized by the selective oxidation. Based on Pilling-Bedworth ratio (PBR) and energy dispersive spectrometer (EDS) analysis, Y2O3 contributed 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.

引用

页码：1003 / 1008

页数：6

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