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Influence of Cr upon hydrogen permeationin Ni3Al at low partial pressure of oxygen
- 1.0177779 - UFM-A 20013302 RIV GB eng J - Journal Article
Čermák, Jiří - Rothová, Věra
Influence of Cr upon hydrogen permeationin Ni3Al at low partial pressure of oxygen.
Intermetallics. Roč. 9, č. 3 (2001), s. 245-251. ISSN 0966-9795. E-ISSN 1879-0216
R&D Projects: GA AV ČR IBS2041105; GA ČR GA106/99/1179
Institutional research plan: CEZ:AV0Z2041904
Keywords : hydrogen * intermetallics * permeation
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.239, year: 2001
Permeability .FI. of hydrogen with low partial pressure of O2 in Ni3Al, Ni3Al-4Cr, Ni3Al-8Cr intermetallics and in related disordered solid solutions Ni-4Cr, Ni-8Cr, Ni-7Al, Ni-7Al-8Cr (compositions in at.%) was measured in the temperature range 523-1223 K by gas permeation method. A maximum of .FI. at about 623 K observed in Ni3Al is most likely due to maximum of hydrogen solubility reported in literature. It was observed that the addition of Cr to Ni3Al reduces the .FI.. Cromium shows the destabilizing effect that reduces the protective function of Al-based oxides. Aluminium, present in the studied alloys, is responsible for a surface protective layer that reduces the permeation flux of hydrogen.
Permanent Link: http://hdl.handle.net/11104/0074689
Number of the records: 1