本文采用热分析法研究几种金属-氢气共晶反应定向凝固制备藕状多孔材料气孔的形成和长大机理.结果表明,这种工艺气孔是借助熔融金属中的活性杂质非匀质形核的,而长大则是沿固液界面的法线方向向具有粗糙界面的气固相转移,最终形成气孔规则定向排列于金属基体中的多孔材料.
The pore nucleation and growth of porous materials by hydrogen-metal eutectic growth for upward direc-tional solidification were studied by heat analysis method. The results show that the pore is produced by heteroge-nous nucleation in virtue of active impurity in melt metal during the process of directional solidification. And the pore growth is along normal directian of solid-liquid interface and toward coarse interface of gas-solid phase. Finally, the pores are distributed uniformly along the direction of diameter.
参考文献
| [1] | 蒂吉斯切H P;克雷兹特B.多孔泡沫金属[M].北京:化学工业出版社,2005 |
| [2] | Banhart J .[J].Progress in Materials Science,2001,46:559. |
| [3] | Simone A E;Gibson L J .[J].Acta Materials,1996,44(04):1437. |
| [4] | 张华伟,李言祥,刘源.Gasar工艺中金属-氢二元相图的研究[J].金属学报,2005(01):55-59. |
| [5] | 谢建新,刘新华,刘雪峰,方玉诚,王浩.藕状多孔纯铜棒的制备与表征[J].中国有色金属学报,2005(11):1869-1873. |
| [6] | 郑明军,何德坪,陈锋.多孔铝合金的压缩应力-应变特征及能量吸收性能[J].中国有色金属学报,2001(z2):81-85. |
| [7] | 周照耀,吴峥强,黄春曼,夏伟.机械加工对烧结金属多孔材料孔隙的影响[J].南京航空航天大学学报,2005(z1):94-98. |
| [8] | 何方,赵海雷,张秀华,仇卫华,吴卫江,曲选辉.水玻璃常压制备多孔材料[J].功能材料,2005(07):1083-1085,1089. |
| [9] | 刘源,李言祥,张华伟,万疆.金属-气体共晶定向凝固工艺参数对藕状多孔金属镁结构的影响[J].稀有金属材料与工程,2005(07):1128-1130. |
| [10] | 叶强,周炜,刘华蓉,吴大珍,葛学武,张志成.双连续相微乳液辐射聚合制备多孔材料的研究[J].高分子学报,2005(01):40-46. |
| [11] | 陈文革,张强.泡沫金属的特点、应用、制备与发展[J].粉末冶金工业,2005(02):37-42. |
| [12] | 卢光熙;侯增寿.金属学教程[M].上海:上海科学技术出版社,1988 |
| [13] | 李言祥,刘源.金属/气体共晶定向凝固规则多孔金属的研究进展[J].材料导报,2003(04):1-4,49. |
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