Journal of Magnesium and Alloys (Mar 2015)

Effect of single Si1−xCx coating and compound coatings on the thermal conductivity and corrosion resistance of Mg–3Sn alloy

  • Chunming Wang,
  • Sufen Xiao,
  • Yungui Chen,
  • Xia Liu

DOI
https://doi.org/10.1016/j.jma.2014.12.001
Journal volume & issue
Vol. 3, no. 1
pp. 10 – 15

Abstract

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A single Si1−xCx coating and compound coatings were deposited on Mg–3Sn matrix alloy by magnetron sputtering method. Compound coatings included Mg or Mg/AlTi intermediates between Mg–3Sn substrate and Si1−xCx coating. The thermal conductivity of the Mg–3Sn alloy after coating was enhanced at room temperature. The results showed that the Mg–3Sn alloy coated with Mg/AlTi/Si1−xCx displayed higher thermal conductivity, its thermal conductivity after corrosion was 90.1 W/(m K) and 108.4 W/(m K) at 25 °C and 100 °C, respectively. Meanwhile, it was revealed that the Mg/Si1−xCx and Mg/AlTi/Si1−xCx compound coatings had nobler Ecorr and much lower icorr, higher Rp, compared with the bare Mg–3Sn and Mg–3Sn/Si1−xCx system, and improved the corrosion resistance of the magnesium substrate.

Keywords