难熔金属Mo的氧化行为研究

Oxidation Behavior Study of Refractory Metal Mo

选用难熔金属Mo作为难熔金属型芯基体材料,对其不同温度条件下的氧化行为进行了研究。研究发现难熔金属Mo在温度400℃时就已开始发生氧化,温度达到600℃,生成了易挥发性的MoO_(3),随着温度升高,MoO_(3)生成速率加快,挥发加剧,到达750℃,MoO_(3)大量生成,基体挥发严重。研究表明难熔金属Mo不能直接作为金属型芯使用。

Refractory metal Mo was selected as the matrix material of refractory metal core,and its oxidation behavior at different temperatures was studied.It was found that the refractory metal Mo began to oxidize at 400℃,and the volatile MoO 3 was formed at 600℃.With the increase of temperature,the formation rate of MoO 3 was accelerated and the volatilization was intensified.At 750℃,a large amount of MoO 3 was formed and the matrix volatilization was serious.The results show that the refractory metal Mo can't be directly used as therefractory metal core.