caa a22 4500 445844043 CHVBK 20180317145353.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11085-010-9219-1 doi (NATIONALLICENCE)springer-10.1007/s11085-010-9219-1 Acceleration of Metastable to Alpha Transformation of Al2O3 Scale on Fe-Al Alloy by Pure-Metal Coatings at 900°C [Elektronische Daten] [Yuri Kitajima, Shigenari Hayashi, Takumi Nishimoto, Toshio Narita, Shigeharu Ukai] The effect of pure-metal coatings on the transformation of a pre-formed θ-Al2O3 scale on an Fe-50Al alloy was investigated. The elements Fe, Cr, Ti, and Ni were deposited on the pre-formed Al2O3 having a thickness of about 50nm. Ti, Cr or Fe coatings on pre-formed θ-Al2O3 were found to accelerate the transformation to α-Al2O3, while no apparent effect was observed from the Ni coating. Since the corundum crystal structure of Ti2O3, Cr2O3 and Fe2O3 was indentified on Ti, Cr or Fe coated samples and the transformation to α-Al2O3 started at the outer part of the θ-Al2O3 scale, these corundum oxides were considered to act as heterogeneous nucleation sites for α-Al2O3, therefore promoting the transformation from θ-Al2O3 to α-Al2O3. The growth rate of α-Al2O3 grains and the rate of advance of the θ-Al2O3/α-Al2O3 interface were found to be faster with the Fe coating. Springer Science+Business Media, LLC, 2010 Al2O3 scale transformation nationallicence Template effect nationallicence Fe-Al Alloy nationallicence Kitajima Yuri Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut Hayashi Shigenari Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut Nishimoto Takumi Surface and Interface Research Laboratory, Advanced Technology Research Laboratories, Technical Development Bureau, Nippon Steel Corporation, 293-8511, Kimitsu, Chiba, Japan aut Narita Toshio Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut Ukai Shigeharu Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut Oxidation of Metals Springer US; http://www.springer-ny.com 75/1-2(2011-02-01), 41-56 0030-770X 75:1-2<41 2011 75 11085 https://doi.org/10.1007/s11085-010-9219-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11085-010-9219-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kitajima Yuri Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 700 1- Hayashi Shigenari Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 700 1- Nishimoto Takumi Surface and Interface Research Laboratory, Advanced Technology Research Laboratories, Technical Development Bureau, Nippon Steel Corporation, 293-8511, Kimitsu, Chiba, Japan aut NATIONALLICENCE 700 1- Narita Toshio Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 700 1- Ukai Shigeharu Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 773 0- Oxidation of Metals Springer US; http://www.springer-ny.com 75/1-2(2011-02-01), 41-56 0030-770X 75:1-2<41 2011 75 11085 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer