【摘要】 以Ce为主研究了元素对起燃温度的影响并与国外研究较多的钙元素的作用进行了对比 ,认为Ce与Ca同样对镁合金的阻燃具有显著作用 ,添加 1%的Ce ,起燃温度提高约 180℃ ,而添加 1%的Ca ,起燃温度提高约 2 80℃。可直接暴露在大气中熔炼镁合金。研究表明 :添加稀土Ce的镁合金的表面膜基体金属由原来的MgO疏松结构转变为由MgO ,Ce2 O3,Al2 O3及Mg1 7Al2 组成的复合致密结构 ,具有很好的阻燃效果。更多还原

【Abstract】 The effect of Ce and Ca on ignition temperature has been studied.By doping of Ce of 1%, the ignition temperature increases 180℃, it can be melted in air. Ca may also increase the ignition temperature about 280℃.In magnesium alloy, Ce is prone to react with MgO. The results of XRD indicate that oxide film on the surface of ignition-proof magnesium alloy can change from loose construction of simple MgO to compact composite construction consisting of MgO,Ce 2O 3,Mg 17 Al 2 and Al 2O 3,which has excellent ignition proof effect.更多还原