DIMOX工艺制备复合材料熔体表面Mg蒸气扩散动力学研究  

Research on Magnesium Vapor Diffusion Dynamics over Molten Surface in Process of DIMOX Composites

作　　者：袁森[1] 都业志[1] 王武孝[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《西安理工大学学报》2001年第1期6-9,共4页Journal of Xi'an University of Technology

基　　金：陕西省自然科学基金资助项目!( 98C1 4 )

摘　　要：从热力学角度分析了 Al-Mg-Si合金直接氧化生长 Al2 O3/Al复合材料工艺过程中 ,熔体表面 Mg蒸气层的存在 ,按照气体扩散传质动力学原理 ,解析了 Mg蒸气层的厚度。结果表明 :熔体上方 Mg蒸气层的厚度δ与熔体表面距坩埚上沿的距离 L成正比 ,坩埚上沿处 O2的摩尔分数增加 ,Mg蒸气层厚度减小。 Mg蒸气层厚度与材料自氧化生长速度密切相关。In the process that the Al 2O 3/Al composites were produced by the directed oxidation of molten Al Mg Si alloys, the Mg vapor over molten surface is investigated with thermodynamical method in this paper. The thickness of Mg vapor layer is analyzed on the principle of gas flow diffusion dynamics. The results show that the thickness δ of Mg vapor layer is in proportion to the distance L from molten surface to upper fringle of crucible, and reduced when the MOL fraction of Oxygen O 2 over the growth surface increased, and closely related with the growth speed of DIMOX composites.

关 键 词：DIMOX工艺 AL2O3/AL复合材料 Mg蒸气层厚度 扩散动力学 

分 类 号：TQ021.4[化学工程]