TY - JOUR
T1 - High temperature oxidation behavior of directionally solidified Fe(Al,Ta)/Fe2Ta(Al) eutectic composite
AU - Cui, Chunjuan
AU - Zhang, Kai
AU - Wu, Chongyang
AU - Lai, Yuanyuan
AU - Wang, Yan
AU - Su, Haijun
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/8/25
Y1 - 2022/8/25
N2 - It is well known that Fe-Al intermetallic compounds have broad application prospects at high temperatures. The performance of Fe(Al,Ta)/Fe2Ta(Al) eutectic composite prepared by Bridgman directional solidification technology has been further improved as compared with that of Fe-Al intermetallic compounds. In this paper, high-temperature oxidation behaviors of directionally solidified Fe(Al,Ta)/Fe2Ta(Al) eutectic composite in static air were studied by isothermal oxidation test. The oxidized surface and cross section of directionally solidified Fe(Al,Ta)/Fe2Ta(Al) eutectic composite were characterized by scanning electron microscopy, X-ray diffraction and energy dispersive spectroscopy. The mechanism of high-temperature oxidation was analyzed from the point of view of kinetics and thermodynamics studies combined with the data of the Ellingham-Richardson diagram. The oxidation weight gain of the Fe(Al,Ta)/Fe2Ta(Al) eutectic composite at the same solidification rate is increased with temperature and Al2O3 is formed at the beginning of oxidation. However, a dense oxide film is not formed due to the small content of Aluminum, and the final oxide film for Fe(Al,Ta)/Fe2Ta(Al) eutectic composite after 100 hours′ oxidation is composed of Fe2O3 and Al3Fe5O12.
AB - It is well known that Fe-Al intermetallic compounds have broad application prospects at high temperatures. The performance of Fe(Al,Ta)/Fe2Ta(Al) eutectic composite prepared by Bridgman directional solidification technology has been further improved as compared with that of Fe-Al intermetallic compounds. In this paper, high-temperature oxidation behaviors of directionally solidified Fe(Al,Ta)/Fe2Ta(Al) eutectic composite in static air were studied by isothermal oxidation test. The oxidized surface and cross section of directionally solidified Fe(Al,Ta)/Fe2Ta(Al) eutectic composite were characterized by scanning electron microscopy, X-ray diffraction and energy dispersive spectroscopy. The mechanism of high-temperature oxidation was analyzed from the point of view of kinetics and thermodynamics studies combined with the data of the Ellingham-Richardson diagram. The oxidation weight gain of the Fe(Al,Ta)/Fe2Ta(Al) eutectic composite at the same solidification rate is increased with temperature and Al2O3 is formed at the beginning of oxidation. However, a dense oxide film is not formed due to the small content of Aluminum, and the final oxide film for Fe(Al,Ta)/Fe2Ta(Al) eutectic composite after 100 hours′ oxidation is composed of Fe2O3 and Al3Fe5O12.
KW - Fe(Al,Ta)/FeTa(Al) eutectic composite
KW - High temperature oxidation
KW - Isothermal oxidation kinetics
KW - Oxidation mechanism
KW - Surface morphology
UR - http://www.scopus.com/inward/record.url?scp=85129726646&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2022.165210
DO - 10.1016/j.jallcom.2022.165210
M3 - 文章
AN - SCOPUS:85129726646
SN - 0925-8388
VL - 913
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 165210
ER -