Analysis of pressure-composition-isotherms for design of non-Pd-based alloy membranes with high hydrogen permeability and strong resistance to hydrogen embrittlement
Analysis of pressure-composition-isotherms for design of non-Pd-based alloy membranes with high hydrogen permeability and strong resistance to hydrogen embrittlement
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DOI：
10.1016/j.memsci.2015.12.030
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发表时间：
2016-04-01
影响因子：
9.5
通讯作者：
Murata, Y.
中科院分区：
文献类型：
--
作者：
Suzuki, A.;Yukawa, H.;Murata, Y.
基于氢化学势对氢渗透的新描述，分析了Pd-27mol%Ag合金膜的氢渗透性。氢通量始终与PCT因子f（pcT）成比例，其反映了相应的压力组成等温线（PCT曲线）的形状，而不管氢溶解度是否以Sievert定律的形式表示。从PCT因子、fpcT和DBTC（韧脆转变氢浓度）两个方面得出了非Pd基合金膜的合金设计概念。以V-9mol%Al合金为例，针对实际的温度和压力条件进行了设计.在此条件下，该合金膜具有优异的氢渗透性和强的抗氢脆性。(C)2015 Elsevier B. V.版权所有。
The hydrogen permeability of Pd-27 mol%Ag alloy membrane has been analyzed in view of the new description of hydrogen permeation based on hydrogen chemical potential. The hydrogen flux is consistently proportional to the PCT factor, f(pcT), which reflects the shape of the corresponding pressure composition-isotherm (PCT curve), regardless of whether hydrogen solubility is expressed in a format of the Sievert's law or not. From the two points of the PCT factor, fpcT, and DBTC (the ductile-to-brittle transition hydrogen concentration), the concept for alloy design of non-Pd-based alloy membranes is obtained. As an example, V-9 mol%Al alloy is designed for applied temperature and pressure condition. For this condition, this alloy membrane possesses excellent hydrogen permeability with strong resistance to hydrogen embrittlement. (C) 2015 Elsevier B.V. All rights reserved.