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Title: Hydrogen solubility as a probe for dislocation formation, rearrangement and annihilation in Pd and Pd/Al{sub 2}O{sub 3} composites

Abstract

It has been well-established that H dissolved in metals segregates to dislocations. This segregation can lead to readily measurable H{sub 2} solubility enhancements in heavily dislocated Pd, i.e., a greater solubility at a given p{sub H{sub 2}} in the dislocated Pd as compared to annealed Pd. The purpose of this research is to compare the dislocation densities, as monitored by the solubility enhancements, of cycled Pd and a cycled Pd/1.5 mol% Al{sub 2}O{sub 3} composite prepared by the internal oxidation of a Pd{sub 0.97}Al{sub 0.03} alloy. This composite was chosen because it has been examined by TEM and because its hydrogen solubility has been measured. The effect of annealing temperatures on the re-arrangement/annihilation of dislocations, as followed by H{sub 2} solubility enhancements, for the cycled composite and cycled Pd will be determined.

Authors:
;  [1];  [2]
  1. Univ. of Vermont, Burlington, VT (United States)
  2. Indian Inst. of Tech., Kanpur (India). Dept. of Materials and Metallurgical Engineering
Publication Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
691336
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 41; Journal Issue: 5; Other Information: PBD: 6 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MICROSTRUCTURE; PALLADIUM; ALUMINIUM OXIDES; COMPOSITE MATERIALS; DISLOCATIONS; HYDROGEN; SOLUBILITY; ANNEALING; PRECIPITATION

Citation Formats

Wang, D., Flanagan, T.B., and Balasubramaniam, R. Hydrogen solubility as a probe for dislocation formation, rearrangement and annihilation in Pd and Pd/Al{sub 2}O{sub 3} composites. United States: N. p., 1999. Web. doi:10.1016/S1359-6462(99)00183-9.
Wang, D., Flanagan, T.B., & Balasubramaniam, R. Hydrogen solubility as a probe for dislocation formation, rearrangement and annihilation in Pd and Pd/Al{sub 2}O{sub 3} composites. United States. doi:10.1016/S1359-6462(99)00183-9.
Wang, D., Flanagan, T.B., and Balasubramaniam, R. Fri . "Hydrogen solubility as a probe for dislocation formation, rearrangement and annihilation in Pd and Pd/Al{sub 2}O{sub 3} composites". United States. doi:10.1016/S1359-6462(99)00183-9.
@article{osti_691336,
title = {Hydrogen solubility as a probe for dislocation formation, rearrangement and annihilation in Pd and Pd/Al{sub 2}O{sub 3} composites},
author = {Wang, D. and Flanagan, T.B. and Balasubramaniam, R.},
abstractNote = {It has been well-established that H dissolved in metals segregates to dislocations. This segregation can lead to readily measurable H{sub 2} solubility enhancements in heavily dislocated Pd, i.e., a greater solubility at a given p{sub H{sub 2}} in the dislocated Pd as compared to annealed Pd. The purpose of this research is to compare the dislocation densities, as monitored by the solubility enhancements, of cycled Pd and a cycled Pd/1.5 mol% Al{sub 2}O{sub 3} composite prepared by the internal oxidation of a Pd{sub 0.97}Al{sub 0.03} alloy. This composite was chosen because it has been examined by TEM and because its hydrogen solubility has been measured. The effect of annealing temperatures on the re-arrangement/annihilation of dislocations, as followed by H{sub 2} solubility enhancements, for the cycled composite and cycled Pd will be determined.},
doi = {10.1016/S1359-6462(99)00183-9},
journal = {Scripta Materialia},
number = 5,
volume = 41,
place = {United States},
year = {1999},
month = {8}
}