Surface barrier for hydrogen permeability in Ni3Al - influence of Cr, Fe, and Zr

0177780 - UFM-A 20013303 RIV GB eng J - Článek v odborném periodiku
Čermák, Jiří - Rothová, Věra
Surface barrier for hydrogen permeability in Ni3Al - influence of Cr, Fe, and Zr.
Intermetallics. Roč. 9, č. 5 (2001), s. 403-408. ISSN 0966-9795. E-ISSN 1879-0216
Grant CEP: GA AV ČR IBS2041105; GA ČR GA106/99/1179
Výzkumný záměr: CEZ:AV0Z2041904
Klíčová slova: hydrogen * surface * interemetallics
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.239, rok: 2001

Hydrogen permeability through Ni3Al-M intermetallic membranes was studied by gas-permeation method in the temperature range 573-1223 K. The influence of the third element (M = Cr, Fe, and Zr) upon the retardation of hydrogen transfer from the gas phase into the bulk was qualified by dependence of measured permeation flux J through the sample on sample thickness d. It was found that Zr supports and, on the contrary, Cr eliminates the inhibiting effect of the surface. The most expressive effect of Fe additions consits in a considerably raised grain boundary brittleness in a hydrogen environment.
Trvalý link: http://hdl.handle.net/11104/0074690