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

Hukui Chen; Jianrui Liu; Weidong Huang

doi:10.1016/j.matchar.2006.03.012

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

Hukui Chen, Jianrui Liu, Weidong Huang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

The surface films formed on molten magnesium in an air/HFC-134a gas mixture at 700 °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 μm.

Original language	English
Pages (from-to)	51-58
Number of pages	8
Journal	Materials Characterization
Volume	58
Issue number	1
DOIs	https://doi.org/10.1016/j.matchar.2006.03.012
State	Published - Jan 2007

Keywords

HFC-134a
Magnesium melt
Microstructure
Surface film

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10.1016/j.matchar.2006.03.012

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

abstract = "The surface films formed on molten magnesium in an air/HFC-134a gas mixture at 700 °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 μm.",

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author = "Hukui Chen and Jianrui Liu and Weidong Huang",

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AU - Huang, Weidong

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AB - The surface films formed on molten magnesium in an air/HFC-134a gas mixture at 700 °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 μm.

KW - HFC-134a

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

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Keywords

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