Original title: Degradation of protective effect of surface layer on Ni3Al-Cr in hydrogen environment
Authors: Čermák, Jiří ; Rothová, Věra
Document type: Papers
Conference/Event: Materials Structure and Micromechanics of Fracture /3./, Brno (CZ), 2001-06-27 / 2001-06-29
Year: 2001
Language: eng
Abstract: Protective effect of surface layer on Cr-doped (4 and 8 at. % Cr) Ni3Al intermetallic was studied by high-temperature hydrogen permeation tests that were carried out at temperatures in the interval 775-1223 K. Hydrogen with about 1 vol. ppm O2 and 2 vol. ppm of H2O was used for the gas-permeation tests. It was observed that the addition of Cr degrades the - otherwise very good - high-temperature protective ability of oxide-containing surface layer of Ni3Al-Cr at strongly reducing hydrogen environment.
Keywords: hydrogen; intermetallics; surface
Project no.: CEZ:AV0Z2041904 (CEP), IBS2041105 (CEP), GA106/99/1179 (CEP)
Funding provider: GA AV ČR, GA ČR
Host item entry: Materials Structure and Micromechanics of Fracture

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0074681

Permalink: http://www.nusl.cz/ntk/nusl-26500


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