Influence of Cr upon hydrogen permeationin Ni3Al at low partial pressure of oxygen

0177779 - UFM-A 20013302 RIV GB eng J - Článek v odborném periodiku
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
Grant CEP: GA AV ČR IBS2041105; GA ČR GA106/99/1179
Výzkumný záměr: CEZ:AV0Z2041904
Klíčová slova: hydrogen * intermetallics * permeation
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.239, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0074689