Unexpected formation of hydrides in heavy rare earth containing magnesium alloys

被引：43

作者：

Huang, Yuanding ^{[1
]}

Yang, Lei ^{[1
,2
]}

You, Sihang ^{[1
]}

Gan, Weimin ^{[1
]}

Kainer, Karl Ulrich ^{[1
]}

Hort, Norbert ^{[1
]}

机构：

[1] Helmholtz Zentrum Geesthacht, Zentrum Mat & Kustenforsch, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany

[2] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Educ Minist China, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China

来源：

JOURNAL OF MAGNESIUM AND ALLOYS | 2016年 / 4卷 / 03期

关键词：

Magnesium alloy; Microstructure; Hydride; Heat treatment; Rare earths; GD; DY; CORROSION; ND;

D O I：

10.1016/j.jma.2016.08.002

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

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. (C) 2016 Production and hosting by Elsevier B.V. on behalf of Chongqing University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：173 / 180

页数：8

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