Impact of the fcc/bcc phase transition on the homogeneity and behavior of PdCu membranes
文献类型：期刊论文
| 作者 | Goldbach, Andreas; Yuan, Lixiang; Xu, Hengyong |
| 刊名 | separation and purification technology
 |
| 出版日期 | 2010-05-28 |
| 卷号 | 73期号:1页码:65-70 |
| 关键词 | PdCu membrane preparation Temperature cycling Permeation hysteresis Structural segregation Defect formation |
| ISSN号 | 1383-5866 |
| 产权排序 | 1;1 |
| 通讯作者 | 哥德巴赫 |
| 英文摘要 | the pd-cu phase diagram is discontinuous in the immediate vicinity of the body centered cubic (bcc) pd(47.3)cu(52.7) alloy, which is a promising material for h(2) separation membranes. hence pdcu/ceramic composite membranes have been prepared by sequential electroless plating of the metals to investigate the influence of concomitant face centered cubic (fcc) phases on the behavior of such membranes. structural and compositional segregation was observed during cycling of a bcc pd(48)cu(52) membrane through the fcc/bcc miscibility gap between 723 and 873 k. transient bcc and fcc phases with low pd content also appeared in the initial formation stages of an fcc pd(63)cu(37) membrane during alloying of pd and cu layers at 723 and 773 k. both phenomena could be sources of persistent stoichiometric heterogeneity in supported bcc pdcu membranes, which considerably reduces their h(2) permeability. an fcc/bcc pd(46)cu(54) mixed phase membrane withstood 30 temperature cycles between room temperature and 673 k well, although a slight increase of the leak flow was observed. the widening of the leaks is tentatively attributed to mechanical stress caused by the incommensurate lattice expansion of hydrogenated fcc and bcc pdcu grains. a formation mechanism for the frequently observed pinholes in bcc pdcu membranes is proposed based on the discrepancy between the hydrogen solubility in bcc and fcc pdcu alloys. as a consequence coexisting fcc phases could reduce the life time of bcc pdcu membranes in h(2) atmospheres. (c) 2010 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; technology |
| 类目[WOS] | engineering, chemical |
| 研究领域[WOS] | engineering |
| 关键词[WOS] | porous stainless-steel ; composite membranes ; cu membranes ; permeation ; transport ; h-2 ; segregation |
| 收录类别 | SCI ; ISTP |
| 原文出处 | false |
| 语种 | 英语 |
| WOS记录号 | WOS:000278721700012 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/103655]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Goldbach, Andreas,Yuan, Lixiang,Xu, Hengyong. Impact of the fcc/bcc phase transition on the homogeneity and behavior of PdCu membranes[J]. separation and purification technology,2010,73(1):65-70. |
| APA | Goldbach, Andreas,Yuan, Lixiang,&Xu, Hengyong.(2010).Impact of the fcc/bcc phase transition on the homogeneity and behavior of PdCu membranes.separation and purification technology,73(1),65-70. |
| MLA | Goldbach, Andreas,et al."Impact of the fcc/bcc phase transition on the homogeneity and behavior of PdCu membranes".separation and purification technology 73.1(2010):65-70. |
入库方式： OAI收割
来源：大连化学物理研究所
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