Effect of yttrium, calcium and zirconium on ignition-proof principle and mechanical properties of magnesium alloys

稀土学报(英文版), 2012, 30(1): 74-78. doi: 10.1016/S1002-0721(10)60642-4

^1, , ^2, , ^3, , ^4, , ^5,

1.Key laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taouan University of Technology, Taiyuan 030024, China;Shanxi Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

2.Key laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taouan University of Technology, Taiyuan 030024, China;Shanxi Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

3.Key laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taouan University of Technology, Taiyuan 030024, China;Shanxi Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China

4.Key laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taouan University of Technology, Taiyuan 030024, China;Shanxi Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

5.Key laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taouan University of Technology, Taiyuan 030024, China;Shanxi Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

基金项目: the National Natural Science Foundation of China(50901048;51174143) Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi and Natural Science Foundation of Shanxi(2010021022-5) the fund of the State Key Laboratory of Solidification Processing in NWPU(SKLSP201003) Program for Changjiang Scholar and Innovative Research Team in University(IRT0972)

Effect of yttrium, calcium and zirconium on ignition-proof principle and mechanical properties of magnesium alloys

FAN Jianfeng ^1, , CHEN Zhiyuan ^2, , YANG Weidong ^3, , FANG Shuang ^4, , XU Bingshe ^5,

Keywords： magnesium alloys

Good ignition-proof principle and mechanical properties were realized in Mg-Y-Ca-Zr alloy system.By adding Y and Ca elements,the ignition point of Mg-3.5Y-0.8Ca alloy was improved to over 1173 K,and the alloy could be melted in air without any protections.The effect of Zr addition on the microstructures and mechanical properties of Mg-3.5Y-0.8Ca alloys were investigated,and Mg-3.5％Y0.8％Ca-0.4％Zr alloy had good comprehensive properties with tensile strength of 190 MPa and elongation of 11％.Auger electron spectroscopy (AES) and X-ray diffraction (XRD) analysis revealed that the oxide film formed on the surface of Mg-3.5Y-0.8Ca alloy was mainly composed of Y2O3.Thermogravimetric measurements in dry air indicated that the oxidation dynamics curves measured at 773,873 and 973 K followed the cubic law.Moreover,the semiconductor characteristic of Y2O3 film and its effect on ignition-proof properties of Magnesium alloys were discussed from the viewpoint of electrochemistry.

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Effect of yttrium, calcium and zirconium on ignition-proof principle and mechanical properties of magnesium alloys

参考文献