Unexpected formation of hydrides in heavy rare earth containing magnesium alloys

Research output: Journal contributionsJournal articlesResearchpeer-review


  • Yuanding Huang
  • Lei Yang
  • Sihang You
  • Weimin Gan
  • Karl Ulrich Kainer
  • Norbert Hort

Mg–RE (Dy, Gd, Y) alloys show promising for being developed as biodegradable medical applications. It is found that the hydride REH2 could be formed on the surface of samples during their preparations with water cleaning. The amount of formed hydrides in Mg–RE alloys is affected by the content of RE and heat treatments. It increases with the increment of RE content. On the surface of the alloy with T4 treatment the amount of formed hydride REH2 is higher. In contrast, the amount of REH2 is lower on the surfaces of as-cast and T6-treated alloys. Their formation mechanism is attributed to the surface reaction of Mg–RE alloys with water. The part of RE in solid solution in Mg matrix plays an important role in influencing the formation of hydrides.

Original languageEnglish
JournalJournal of Magnesium and Alloys
Issue number3
Pages (from-to)173-180
Number of pages8
Publication statusPublished - 01.09.2016
Externally publishedYes

    Research areas

  • Heat treatment, Hydride, Magnesium alloy, Microstructure, Rare earths
  • Engineering