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330Cb alloy (Fe35Ni18Cr1Nb2Si) oxidation study between 800 and 1000 °C
Author(s) -
Issartel C.,
Buscail H.,
Nguyen C. T.,
Fleurentin A.
Publication year - 2010
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200905442
Subject(s) - chromia , spallation , alloy , oxide , isothermal process , materials science , niobium , metallurgy , diffusion , scale (ratio) , layer (electronics) , composite material , thermodynamics , physics , quantum mechanics , neutron
The 330Cb alloy (Fe35Ni18Cr1Nb2Si) has been oxidized, in air, in the 800–1000 °C temperature range. Results show the formation of a chromia layer acting as a good diffusion barrier under isothermal conditions. Nevertheless, some oxide scale spallation is generally observed after cooling to room temperature. A fine and adherent chromia scale is only obtained after short‐term oxidation at 800 °C. In this case, the scale is probably too fine to expect a protection against carburization. At 900 °C we have observed that the scale spalled off on the niobium rich alloy areas. At 1000 °C the scale adherence is very bad. This study shows that the oxide scale adherence is decreased when the 330Cb alloy oxidation duration is increased.