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Ti-Nb-Cr alloys for hydrogen storage: impacts of the microstructure and processing on the hydrogen sorption behavior

Grant number: 14/06127-5
Support type:Scholarships abroad - Research
Effective date (Start): August 28, 2014
Effective date (End): August 27, 2015
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal researcher:Sydney Ferreira Santos
Grantee:Sydney Ferreira Santos
Host: Jacques Huot
Home Institution: Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
Research place: Université du Québec à Trois-Rivières (UQTR), Canada  


Several hydride-forming alloys have been investigated over the last decade for solid state hydrogen storage but so far there is no alloy which fully accomplishes all the requirements to allow its large scale use for this application. Recently, Ti-Cr-Nb alloys started to be studied for such application. In a wide composition range, these alloys are single phase solid solutions with body centered cubic (BCC) structures. As previously reported by a number of authors, several Ti based BCC solid solutions have interesting hydrogen sorption properties. Some alloys of the Ti-Cr-V, Ti-Mn-V, and Ti-Mo-V systems are good examples of the aforesaid. In these systems, the BCC structure is stabilized by vanadium. Niobium is also a BCC phase stabilizer which could replace V in these alloys, but much less is known about the metallurgical features and especially about the hydrogen sorption properties of Ti ternary alloys containing Nb. Another interesting point to mention is that hydrogen storage BCC alloys usually have their hydrogen sorption properties investigated in the as-cast state (with typically coarse grained and dendritic microstructures), but few is known concerning the effects of heat treatments and mostly thermo-mechanical treatments on the microstructure and hydrogen sorption properties of these alloys. In this project, it is proposed the investigation of Ti-Cr-Nb alloys for hydrogen storage. The microstructure and hydrogen sorption properties (activation, hydrogen sorption kinetics, and pressure-composition isotherms) of these alloys will be investigated in as-cast states and also after heat treatments and thermo-mechanical treatments. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ASSELLI, A. A. C.; SANTOS, S. F.; HUOT, J. Hydrogen storage in filed magnesium. Journal of Alloys and Compounds, v. 687, p. 586-594, DEC 5 2016. Web of Science Citations: 9.
DUPIM, IVALDETE DA SILVA; SANTOS, SYDNEY FERREIRA; HUOT, JACQUES. Effect of Cold Rolling on the Hydrogen Desorption Behavior of Binary Metal Hydride Powders under Microwave Irradiation. METALS, v. 5, n. 4, p. 2021-2033, DEC 2015. Web of Science Citations: 3.

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