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Formation mechanism of MoSi2 in presence of copper by combustion synthesis: study in thermal explosion mode

机译:燃烧合成铜存在下MoSi2的形成机理:热爆炸模式研究

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The effect of copper addition on the formation mechanism of MoSi2 through combustion synthesis (thermal explosion mode) from elemental powder mixtures was evaluated. It was proposed that in the presence of copper, the reaction starts by forming a low melting point and eutectic melt of Cu-Si, and proceeds by the dissolution of Mo in the melt. The effect of copper addition on the ignition and combustion temperatures was also investigated. It was found that by increasing the copper amount, the ignition temperature decreases but the combustion temperature increases. This effect was also attributed to the formation of low temperature eutectic melt which causes the initiation of the reaction at lower temperatures. This melt also increased the mass and heat transfer rate, which leads to a higher reaction rate and combustion temperature.
机译:评估了添加铜对元素粉末混合物燃烧合成(热爆炸模式)形成MoSi2的影响。提出在铜的存在下,反应通过形成低熔点的Cu-Si的低共熔熔体开始,并且通过Mo在熔体中的溶解而进行。还研究了添加铜对着火和燃烧温度的影响。已经发现,通过增加铜量,点火温度降低,但是燃烧温度升高。该作用还归因于低温共晶熔体的形成,其导致在较低温度下引发反应。该熔体还增加了质量和传热速率,从而导致更高的反应速率和燃烧温度。

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