Effect of Ce Addition on the Ignition-Proof Properties and Surface Tension of AZ91D-2.5Ca(Wt.%) Magnesium Alloy

Abstract:

In order to develop ignition-proof magnesium alloys, the effect of alloying element Ce on the ignition-proof properties and surface tension of AZ91D-2.5Ca alloy were investigated. The results show that the addition of Ce can significantly raise the ignition temperature and change the structure of surface oxide film as well as the surface tension. When the Ce content increases to 1.2%, the ignition point reaches 1371K. Upon the addition of Ce, the oxide film of AZ91D-2.5Ca melt changes to fine and close structure from the porous structure before the Ce addition. The composite oxide film mainly composed of MgO, Al₂O₃, CaO and Ce₂O₃. The surface tension of AZ91D-2.5Ca decrease with the increasing Ce content, as the active-element Ce enriched at the melt surface.

• Periodical: Materials Science Forum (Volume 788)
• Pages: 82-87
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.788.82
• Online since: April 2014
• Authors: Lin Qin, Jian Ding*, Zheng Fang, Wei Min Zhao
• Keywords: AZ91D, Ce, Ignition-Proof, Oxide Film, Surface Tension

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