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The Y-doped MgZnCa alloys with ultrahigh specific strength

已有 4372 次阅读 2012-5-7 00:34 |个人分类:非晶前沿|系统分类:论文交流| Strength, specific

The Y-doped MgZnCa alloys with ultrahigh specific strength and good corrosion resistance in simulate body fluid

J.F. Wang^a^,^b^,

Y.Y. Wei^a^,^b,

S.F. Guo^c^,

S. Huang^a^,^b,

X.E. Zhou^a^,^b,

F.S. Pan^a

^a National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, PR China
^b College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China
^c School of Materials Science and Engineering, Southwest University, Chongqing 400715, PR China

Abstract
The microalloying effects of Y on the microstructure, mechanical properties and bio-corrosion resistances of Mg₆₉Zn₂₇Ca₄ (at.%) alloy were investigated by X-ray diffraction, compressive tests and electrochemical treatments, respectively. The Y-bearing Mg-Zn-Ca alloys were found to possess an ultrahigh compressive strength above 1000 MPa as well as high specific strength of 3.44 × 10⁵ N m kg^- 1. The enhanced mechanical properties can be attributed to the ductile dendrite phase, Mg₁₂YZn, which is dispersed in the matrix with the Y addition. Furthermore, the Y-doped Mg-Zn-Ca alloys studied in this work have much better corrosion resistance than traditional ZK60 and pure Mg alloys in simulated body fluid (SBF) at 37 °C, which could be good candidates to be used as biomedical materials

http://dx.doi.org/10.1016/j.matlet.2012.04.130

http://www.sciencedirect.com/science/article/pii/S0167577X12006222?v=s5

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