| Gasar工艺下藕状多孔银的气孔结构研究 |
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| 引用本文： | 梁娟,金青林,杨天武,李再久,谢明.Gasar工艺下藕状多孔银的气孔结构研究[J].稀有金属材料与工程,2016,45(10):2519-2523. |
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| 作者姓名： | 梁娟 金青林 杨天武 李再久 谢明 |
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| 作者单位： | 昆明理工大学,昆明理工大学,昆明理工大学,昆明贵金属研究所,昆明贵金属研究所 |
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| 摘 要： | 金属-气体共晶定向凝固（Gasar)是制备藕状多孔金属的新工艺，利用自行研制的Gasar装置，成功地制备了不同纯氧分压下的藕状多孔银试样，研究了氧气分压对藕状多孔银气孔形貌（气孔率、气孔尺寸和分布、气泡形核）的影响。结果表明：氧气分压对气孔形貌影响十分显著。随着氧气压力的增加，气孔率增大而平均气孔直径减小。
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| 关 键 词： | 藕状多孔 共晶凝固 多孔银 氧 气孔率 |
| 收稿时间： | 2014/6/26 0:00:00 |
| 修稿时间： | 2014/11/10 0:00:00 |
Pore morphology of lotus-type porous silver fabricated by Gasar process in oxygen atmosphere |
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| liang juan,Jin Qinglin,Yang Tianwu,Li Zaijiu and Xie Ming.Pore morphology of lotus-type porous silver fabricated by Gasar process in oxygen atmosphere[J].Rare Metal Materials and Engineering,2016,45(10):2519-2523. |
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| Authors: | liang juan Jin Qinglin Yang Tianwu Li Zaijiu and Xie Ming |
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| Affiliation: | Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming Institute of Precious Metals,Kunming Institute of Precious Metals |
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| Abstract: | Directional solidification of metal/gas eutectic (Gasar) is a novel process for fabricating porous metals with oriented pores parallel to the solidification direction. By use of the developed Gasar apparatus, lotus-type porous silver samples with different porosities have been fabricated in oxygen atmosphere. In this paper, we studied the effects of gas pressure on porosity, pore nucleation, pore size and distribution. It is concluded that the porosity and the pore size in the lotus-type porous silver were significantly affected by pressures of oxygen. The porosity increases with increasing pressure of oxygen. The average pore diameter decreases with increasing of oxygen pressure. |
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| Keywords: | lotus-type eutectic solidification porous silver oxygen porosity |
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