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首页> 外文期刊>Journal of Materials Science >Behavior of magnesium and silicon in the formation of MgO/AlN composite
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Behavior of magnesium and silicon in the formation of MgO/AlN composite

机译:镁和硅在MgO / AlN复合材料形成中的行为

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摘要

MgO/AlN composites have been fabricated by directed metal nitridation of Al-Si alloy in flowing N-2 at 1473 K. A mixture of magnesia particles and chemically pure magnesium powder was placed on the surface of AlSi alloy block as reinforcement materials. Mg powder initiates the infiltration and nitridation of Al alloy melt by eliminating protective Al2O3 film at the reaction frontier. New Mg vapor from the interface reaction between Al and MgO particles, keeps as continuous deoxidization agent as the added Mg powder. The spinel layer thickness due to the reaction of Al melt with MgO particles is controlled by Mg content. Si not only reduces the surface tension and viscosity of Al alloy melt, but also leads to increase in N-2 content.
机译:MgO / AlN复合材料是通过在1473 K的流动N-2下对Al-Si合金进行直接金属氮化而制成的。将氧化镁颗粒和化学纯镁粉的混合物置于AlSi合金块的表面作为增强材料。镁粉通过消除反应前沿的保护性Al2O3膜来引发铝合金熔体的渗透和氮化。 Al和MgO颗粒之间的界面反应产生的新的Mg蒸气,与添加的Mg粉末一样,保持为连续的脱氧剂。由Al熔体与MgO颗粒反应引起的尖晶石层厚度由Mg含量控制。 Si不仅降低铝合金熔体的表面张力和粘度,而且导致N-2含量的增加。

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