Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2009, Vol. 30 ›› Issue (4): 571-574.DOI: -

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On the ignition-proof behavior of Ca during Mg alloy melting

Ji, Hai-Bin (1); Yao, Guang-Chun (1); Liu, Le-Tian (1); Zu, Guo-Yin (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-04-15 Published:2013-06-22
  • Contact: Ji, H.-B.
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Abstract: Investigates the effect of Ca addition on the ignition-proof behavior of 10 kinds of molten Mg alloys, in which the Ca content was 0.5wt%-5.0wt% and Al content 9.0wt%. All the specimens of equal weight taken from those alloys were measured at 700°C for their weight increments due to oxidation, and their oxidized surface morphologies were observed. The results revealed that a dense composite CaO film containing a bit of MgO grows up on alloy surface at high temperature after adding Ca to the alloy, and the film is thus isolated from air to prevent Mg from burning. The ignition-proof effect is favorable if the Ca content in Mg alloy is 3.5wt%.

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