Oxidization Thermo-dynamics of Ignition-proof Element and Oxides Properties in Magnesium Alloy

Zhao Hongjin~ 1; Zhang Yinghui~1; Kang Yonglin~2; Wang Zhaohui~2

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Oxidization Thermo-dynamics of Ignition-proof Element and Oxides Properties in Magnesium Alloy
Issue 6, Pages: 340-343(2006)
Published： 2006 ，
DOI：

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[1]赵鸿金,张迎晖,康永林,王朝辉.镁合金阻燃元素氧化热力学及氧化物物性分析[J].特种铸造及有色合金,2006(06):340-343+318.

Zhao Hongjin~ 1, Zhang Yinghui~1, Kang Yonglin~2, et al. Oxidization Thermo-dynamics of Ignition-proof Element and Oxides Properties in Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys (6):340-343(2006)
[1]赵鸿金,张迎晖,康永林,王朝辉.镁合金阻燃元素氧化热力学及氧化物物性分析[J].特种铸造及有色合金,2006(06):340-343+318. DOI：

Zhao Hongjin~ 1, Zhang Yinghui~1, Kang Yonglin~2, et al. Oxidization Thermo-dynamics of Ignition-proof Element and Oxides Properties in Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys (6):340-343(2006) DOI：

摘要

比较分析了部分合金元素及其氧化物的电负性、氧化反应Gibbs自由能变及相关物性参数。指出碱土金属与稀土金属元素是镁合金合金化阻燃的主要元素

其中Be最为有效。鉴于Be有较大毒性、Ca对镁合金力学性能有不良影响

稀土元素是其主要的代用品。测试了在AZ91镁合金中加入少量纯稀土元素Ce后的氧化点与燃烧点。结果表明

随Ce加入量的增加

氧化点与燃烧点均呈上升趋势。Ce加入量为1%时氧化点与燃烧点的平均值较AZ91分别提高了33℃和61℃。少量添加Ce时氧化点与燃烧点上升较快

随着Ce含量提高

上升幅度减慢。从阻燃的角度讲添加量在0.6%左右即可。

Abstract

The electro-negativities

Gibbs free energy of oxidation reaction and physical properties of some alloying elements and their oxides were compared. It is pointed out that alkaline earth and rare earth elements are dominant in ignition-proof of is used to

especially Be element. RE elements is used to substituting Be and Ca due to high toxicity of Be and be inferior to mechanical properties of the Mg alloy with Ca. The oxidation and ignition temperatures of AZ91 magnesium alloy with somew hat Ce addition were measured. The results show that although the oxidation and ignition temperatures of the alloy are raised

their increasing velocity is slowed with Ce addition increase

increasing by 33 ℃ and 61 ℃

respectively

with 1% Ce addition

compared with those of the AZ91 magnesium. The advisable Ce addition is about 0.6% for ignition-proof AZ91Mg alloy.