Effect of nickel addition on the solubility of hydrogen in tantalum

被引：27
|
作者：
Taxak, Manju [1 ]
Kumar, Sanjay [1 ]
Kalekar, Bupesh B. [2 ]
Krishnamurthy, Nagaiyar [1 ]
机构：
[1] Bhabha Atom Res Ctr, Fus Reactor Mat Sect, Bombay 400085, Maharashtra, India
[2] Bhabha Atom Res Ctr, Div Analyt Chem, Bombay 400085, Maharashtra, India
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 18期
关键词：
Ta-Ni alloys; Hydrogen solubility; Sievert's constant; Enthalpy; Entropy; HIGH-TEMPERATURE THERMODYNAMICS; NI-NB-ZR; SOLID-SOLUTIONS; PERMEATION CHARACTERISTICS; ALLOY MEMBRANES; INTERSTITIAL HYDROGEN; ELEVATED-TEMPERATURES; COMPOSITE MEMBRANES; METAL MEMBRANES; VANADIUM;
D O I：
10.1016/j.ijhydene.2013.03.155
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A study of isothermal as well as isobaric P-C-T equilibrium measurements has been investigated for the solubility of hydrogen in tantalum and its alloys with nickel (1.7 and 4.9 atom % Ni) in the temperature range of 673-873 K and hydrogen pressure range of 0.60-1.20 atmospheres. The alloys were prepared by arc melting in an inert atmosphere. The dissolved hydrogen was within the solid solubility range corresponding to the temperature and followed the Sievert's law. The hydrogen solubility in tantalum decreased on the addition of nickel as an alloying element. The change in enthalpy and the change in entropy of solution for hydrogen in the tantalum metal and its alloys were calculated. The heat of reaction for hydrogen solution in all the samples was exothermic. The enthalpy of solution for hydrogen in the tantalum matrix increases on the addition of Ni as an alloying element. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：7561 / 7568
页数：8
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