Effect of yttrium,calcium and zirconium on ignition-proof principle and mechanical properties of magnesium alloys |
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| Authors: | FAN Jianfeng CHEN Zhiyuan YANG Weidong FANG Shuang XU Bingshe |
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| Affiliation: | 1,2,3(1.Key laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;2.Shanxi Research Center of Advanced Materials Science and Technology,Taiyuan University of Technology,Taiyuan 030024,China;3 College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China) |
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| Abstract: | 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 ef-fect of Zr addition on the microstructures and mechanical properties of Mg-3.5Y-0.8Ca alloys were investigated,and Mg-3.5%Y-0.8%Ca-0.4%Zr alloy had good comprehensive properties with tensile strength of 190 MPa and elongation of 11%.Auger electron spectros-copy(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 al-loys were discussed from the viewpoint of electrochemistry. |
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| Keywords: | magnesium alloys ignition proof principle mechanical properties rare earths |
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