Effect of Ca and Y additions on oxidation behavior of AZ91 alloy at elevated temperatures

被引：79

作者：

Cheng Su-ling ^{[1
]}

Yang Gen-cang ^{[1
]}

Fan Jian-feng ^{[1
]}

Li You-jie ^{[1
]}

Zhou Yao-he ^{[1
]}

机构：

[1] NW Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2009年 / 19卷 / 02期

基金：

中国国家自然科学基金;

关键词：

AZ91; alloy; calcium; yttrium; oxidation resistance; oxidation kinetics; RARE-EARTH ADDITIONS; MAGNESIUM ALLOYS; MECHANICAL-PROPERTIES; SURFACE OXIDATION; IGNITION; MICROSTRUCTURE; BERYLLIUM;

D O I：

10.1016/S1003-6326(08)60268-X

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In order to develop the ignition-proof magnesium alloy, the effect of alloying elements, Ca and Y, on the oxidation behavior of AZ91 magnesium alloy at elevated temperatures was investigated. The ignition-proof performance, oxide products and oxidation kinetics of Ca- and Y-containing AZ91 alloys were studied. The results indicate that the proper addition of Ca can increase the ignition point of AZ91 alloy greatly. However, the oxide film of Ca-bearing AZ91 alloy formed at elevated temperature is thick and brittle, which is prone to crack in melting and cooling process. In addition, the oxide film of AZ91-xCa alloy is incompact and cannot inhibit the diffusion of reaction particles. The oxide film of AZ91-xCa alloy turns to thin and plastic one after Y is added, and the density of the oxide Film increases greatly due to the formation of composite oxide film composed of MgO, CaO and Y(2)O(3).

引用

页码：299 / 304

页数：6

共 19 条

[1]

Cheng SL, 2006, RARE METAL MAT ENG, V35, P1400

[2] Effects of Ca and Be additions on high temperature oxidation behavior of AZ91 alloys [J].

Choi, BH ;

Park, IM ;

You, BS ;

Park, WW .

MAGNESIUM ALLOYS 2003, PTS 1 AND 2, 2003, 419-4 :639-644

[3] The oxidation behaviour of an AZ91D magnesium alloy at high temperatures [J].

Czerwinski, F .

ACTA MATERIALIA, 2002, 50 (10) :2639-2654

[4] Surface oxidation behavior of Mg-Y-Ce alloys at high temperature [J].

Fan, JF ;

Yang, GC ;

Cheng, SL ;

Xie, H ;

Hao, WX ;

Wang, M ;

Zhou, YH .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (01) :235-239

[5] Effect of rare earths (Y, Ce) additions on the ignition points of magnesium alloys [J].

Fan, JF ;

Yang, GC ;

Chen, SL ;

Xie, H ;

Wang, M ;

Zhou, YH .

JOURNAL OF MATERIALS SCIENCE, 2004, 39 (20) :6375-6377

[6]

Fan Jian-Feng, 2004, Chinese Journal of Nonferrous Metals, V14, P1666

[7]

HU Z, 1990, CASTING TECHNOLOGY Q

[8] Model for the protective oxidation of Mg-Ca alloys containing be at elevated temperature [J].

Huang, YB ;

You, BS ;

Chi, BH ;

Park, WW ;

Chung, IS ;

Suh, SK .

DESIGNING, PROCESSING AND PROPERTIES OF ADVANCED ENGINEERING MATERIALS, PTS 1 AND 2, 2004, 449-4 :637-640

[9]

Li M.S., 2001, High Temperature Corrosion of Metal [M]

[10] Microstructure and properties of AZ91D alloy with Ca additions [J].

Li, PJ ;

Tang, B ;

Kandalova, EG .

MATERIALS LETTERS, 2005, 59 (06) :671-675

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