Ignition-proof mechanism of ZM5 magnesium alloy added with rare earth
来源期刊：中南大学学报(英文版)2010年第1期
论文作者：饶劲松 李华基 薛寒松
文章页码：28 - 33
Key words：rare earth (RE); magnesium alloy; oxidation film; ignition-proof
Abstract: The ignition-proof mechanism of ZM5 magnesium alloy added with 0.1% (mass fraction) rare earth (RE) was investigated. The oxide scales and substrates were characterized by scanning electronic microscope (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and tensile test. And an oxidation model of ZM5 alloy with RE was established. The results show that the ignition temperature of ZM5 alloy is particularly elevated from 654 to 823 ℃, the microstructure is refined, and the tensile strength is slightly improved from 168.2 to 174.6 MPa by adding 0.1% RE. A double-layer oxidation film formed on the alloy surface under high temperature mainly consists of MgO, RE2O3 and Al2O3, which is 2.5-3.5 μm in thickness. It is found that the forming of protective oxidation film on the thermodynamics is attributed to RE elements congregating on the surface of molten Mg alloy.
基金信息：Chongqing Municipal Science and Technology Commission, China
