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High temperature corrosion of Ni 3 Al intermetallic phase materials
Author(s) -
Brill U.
Publication year - 1990
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.19900411207
Subject(s) - sulfidation , intermetallic , metallurgy , materials science , carburizing , high temperature corrosion , corrosion , alloy , oxidizing agent , atmospheric temperature range , ultimate tensile strength , chemistry , thermodynamics , sulfur , physics , organic chemistry
For several decades the ordered intermetallic phases have been of special interest for structural applications, because they combine good high temperature tensile strength with oxidation resistance even at high temperatures. Significant improvements in microalloying and metallurgical techniques have enabled an industrial production of Ni 3 Al. Examinations of the high temperature corrosion behaviour of this material were intended to give informations about potential applications. For this purpose the alloy was tested in the temperature range of 750°C to 1000°C in typical oxidizing, carburizing, sulfidizing and chloridizing environments. Time and temperature dependence of mass change were examined as well as the microstructural appearance of the specimens after the tests. The results show markedly improved oxidation, carburization and chlorination resistance, when compared with the commercial alloys 800 H and 617 while the sulfidation resistance of Ni 3 Al is quite poor.