高纯铝定向凝固中晶界结构和溶质分布特性的研究
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摘要
利用自制的高纯铝定向凝固装置,研究高纯铝定向凝固过程中胞状晶界的结构特性,计算了定向凝固固相晶界的溶质浓度分布。结果表明,高纯铝胞状晶晶界边缘存在微观的隆起和皱褶,晶界处的溶质浓度与晶界结构参数、液固界面前沿液相溶质浓度和定向凝固速度相关。
The grain boundary characteristic in the process of directional solidification was studied by self-made equipment, and the distribution of solutes was calculated. The results show that the upheaval and fold present in the afterbirth-like crystal boundary edges of high purity aluminum. The solute concentration at boundary, structure parameters of boundary and the liquid solute concentration in front of solid-liquid interface relate with the speed of directional solidification.
The grain boundary characteristic in the process of directional solidification was studied by self-made equipment, and the distribution of solutes was calculated. The results show that the upheaval and fold present in the afterbirth-like crystal boundary edges of high purity aluminum. The solute concentration at boundary, structure parameters of boundary and the liquid solute concentration in front of solid-liquid interface relate with the speed of directional solidification.
引文
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[6]张佼,孙宝德,何博.新型5N高纯铝提纯装置原理及控制研究[J].机械工程学报,2006,42(4):64-68.
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[2]吴希俊.晶界结构及其对力学性质的影响(Ⅱ)[J].力学进展,1990,20(2):159-165.
[3]J amgotchinan N H,Billia B.In situ and real-time observation of the formation and dynamics of a cellular interface in a succinonitrile-0.5wt%acetone alloy directionally solidification in a cylinder[J].Journal of crystal growth,1997,181(1):117-132.
[4]Bernd Kauerauf,Gerhard Zimmermann,Lydia Murmann,et al.Planar to cellular transition in the system succinonitrile-acetone during directional solidification of a bulk sample[J].Journal of Crystal growth,1998,193(6):701-711.
[5]Fang Q T,Bruno M J.Casting of high purity aluminum alloys using mechanical stirring for grain refinement[J].Light Metals,1991,187(9):851-859.
[6]张佼,孙宝德,何博.新型5N高纯铝提纯装置原理及控制研究[J].机械工程学报,2006,42(4):64-68.
[7]Zhang Jiao,Shu Da,Rao Qun-li,et al.Nucleation and growth of high purity aluminum grains in directional solidification bulk sample[J].Transactions of nonferrous metals society of China,2006,16(1):1-7.
[8]关玉龙译.凝固过程[M].北京:冶金工业出版社,1981.
[9]胡汉起.金属凝固原理[M].北京:机械工业出版社,1991.
[10]Cornel Venzago,Laura Ohanessian-Pierrard.Round robin analysis of aluminum using glow discharge mass spectrometry[J].Journal of analytical atomic spectrometry,1998,13(3):189-193.