论文部分内容阅读
为了发展高性能阻燃镁合金,对工业纯镁在添加元素Ca和Ce的氧化性能进行了研究。结果表明,随着Ce含量从0%到1.5%(质量分数)的增加,Mg-1.2Ca合金的燃点不断提高,熔体表面张力不断下降。Mg-1.2Ca-1.2Ce燃点可以达到780℃,而且可在大气中不添加任何保护的情况下进行熔炼。随着Ce含量的增加,Mg-1.2Ca熔体氧化膜变得光滑而致密,可以很好地起到阻止氧化、燃烧的效果。通过检测和分析,Mg-1.2Ca-1.2Ce的氧化膜可以分成3层:外层是疏松的Mg O,中间层是MgO-CaO复合氧化膜,内层是MgO-Ce_2O_3复合氧化膜。
In order to develop high-performance flame-retardant magnesium alloys, the oxidation properties of industrial pure magnesium in the addition of Ca and Ce were studied. The results show that with the increase of Ce content from 0% to 1.5% (mass fraction), the ignition temperature of Mg-1.2Ca alloy increases continuously and the melt surface tension decreases. The melting point of Mg-1.2Ca-1.2Ce can reach 780 ° C and can be melted in the atmosphere without any protection. With the increase of Ce content, the Mg-1.2Ca melt oxide film becomes smooth and dense, which can well prevent the oxidation and combustion. Through examination and analysis, the oxide film of Mg-1.2Ca-1.2Ce can be divided into three layers: the outer layer is loose MgO, the middle layer is MgO-CaO composite oxide film, the inner layer is MgO-Ce_2O_3 composite oxide film.