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Title: Development of metal hydride composites

Abstract

Most of current hydride technology at Savannah River Site is based on beds of metal hydride powders; the expansion upon hydridation and the cycling results in continued breakdown into finer particles. Goal is to develop a composite which will contain the fines in a dimensionally stable matrix, for use in processes which require a stable gas flow through a hydride bed. Metal hydride composites would benefit the advanced Thermal Cycling Absorption process (hydrogen isotope separation), and the Replacement Tritium Facility (storage, pumping, compression, purification of hydrogen isotopes). These composites were fabricated by cold compaction of a mixture of metal hydride granules and coarse copper powder; the porosity in the granules was introduced by means of ammonium carbonate. The composite pellets were cycled 138 times in hydrogen with the loss of LANA0.75 (LaNi{sub 4.25}Al{sub 0.75}) limited to the surface. Vacuum sintering can provide additional strength at the edges. Without a coating, the metal hydride particles exposed at the pellet surface can be removed by cycling several times in hydrogen.

Authors:
Publication Date:
Research Org.:
Westinghouse Savannah River Co., Aiken, SC (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
144787
Report Number(s):
WSRC-TR-92-594
ON: DE94009050
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Dec 1992
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN FUEL; HYDROGEN STORAGE; COMPOSITE MATERIALS; HYDROGEN; ADSORPTION; DESORPTION; SAVANNAH RIVER PLANT; HYDRIDES; AMMONIUM CARBONATES; POROUS MATERIALS; MATRIX MATERIALS; COPPER; LANTHANUM ALLOYS; NICKEL ALLOYS; ALUMINIUM ALLOYS

Citation Formats

Congdon, J.W. Development of metal hydride composites. United States: N. p., 1992. Web. doi:10.2172/144787.
Congdon, J.W. Development of metal hydride composites. United States. doi:10.2172/144787.
Congdon, J.W. Tue . "Development of metal hydride composites". United States. doi:10.2172/144787. https://www.osti.gov/servlets/purl/144787.
@article{osti_144787,
title = {Development of metal hydride composites},
author = {Congdon, J.W.},
abstractNote = {Most of current hydride technology at Savannah River Site is based on beds of metal hydride powders; the expansion upon hydridation and the cycling results in continued breakdown into finer particles. Goal is to develop a composite which will contain the fines in a dimensionally stable matrix, for use in processes which require a stable gas flow through a hydride bed. Metal hydride composites would benefit the advanced Thermal Cycling Absorption process (hydrogen isotope separation), and the Replacement Tritium Facility (storage, pumping, compression, purification of hydrogen isotopes). These composites were fabricated by cold compaction of a mixture of metal hydride granules and coarse copper powder; the porosity in the granules was introduced by means of ammonium carbonate. The composite pellets were cycled 138 times in hydrogen with the loss of LANA0.75 (LaNi{sub 4.25}Al{sub 0.75}) limited to the surface. Vacuum sintering can provide additional strength at the edges. Without a coating, the metal hydride particles exposed at the pellet surface can be removed by cycling several times in hydrogen.},
doi = {10.2172/144787},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {12}
}