Characterization of the protective surface films formed on molten magnesium in air/HFC-134a atmospheres

被引：15

作者：

Chen, Hukui ^{[1
]}

Liu, Jianrui

Huang, Weidong

机构：

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

[2] Baoji Coll Arts & Sci, Dept Chem & Chem Engn, Shaanxi 721007, Baoji, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2007年 / 58卷 / 01期

关键词：

surface film; magnesium melt; HFC-134a; microstructure;

D O I：

10.1016/j.matchar.2006.03.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The surface films formed on molten magnesium in an air/HFC-134a gas mixture at 700 degrees C were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and Auger electron spectroscopy (AES). The results showed that there was a protective film on molten magnesium surface, which can prevent molten magnesium from oxidation and ignition. The surface film contained primarily four elements: magnesium, fluorine, oxygen and carbon, and was composed of MgF2, MgO and C. The film properties depended on the HFC-134a concentration in the gaseous mixture and exposure time. The thickness of the film formed after exposure to air containing 0.5% HFC-134a for 10 min was about 1-2 mu m. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：51 / 58

页数：8

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