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Oxidation of intermetallics – Japanese activity
Author(s) -
Taniguchi S.
Publication year - 1997
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.19970480102
Subject(s) - intermetallic , metallurgy , materials science , ceramic , oxygen , micro arc oxidation , chemical engineering , chemistry , microstructure , alloy , engineering , organic chemistry , magnesium alloy
Abstract Oxidation studies on intermetallic compounds carried out in Japan in the last ten years have been summarized and critically reviewed. The major effort was expended to improve the oxidation resistance of TiAl‐base materials. The methods tried include alloying additions, surface treatments and combinations of the both. Alloying additions to TiAl were more closely reviewed here. An excellent oxidation resistance was obtained owing to the formation of Al 2 O 3 scales by alloying additions of 0.2Zr, 0.2Hf or 500 ppm Cl, and by Nb‐ion implantation. Preoxidation under reduced oxygen pressures also resulted in the formation of protective Al 2 O 3 scales. Ceramic coatings and MCrAlY type coatings showed some improvement in the oxidation resistance. Studies on other aluminides of current interest arc relatively few. On the other hand, studies on suicides arc becoming more active than before, though still few in comparison with TiAl‐base materials. In the concluding remarks directions for future studies are shown.