%0 Journal Article
%T Oxidation of a Co-base Superalloy<br>
%A Guichen HOU Zhiyuan LIU
%A Hua WEI Qi ZHENG Xiaofeng SUN Hengrong GUAN Zhuangqi HU Superalloy Division
%A <br>
%J 材料科学技术学报
%D 2008
%I 
%X The oxidation behavior of a cast polycrystalline Co-base superalloy was studied at temperatures from 900 to 1050℃ and analyzed by thermogravimetric analysis (TGA),X-ray diffraction (XRD) and scanning electron microscopy (SEM).The results indicate that a cast Co-base superalloy follows the subparabolic oxidation kinetics at 900 and 1000℃,which are controlled by the growth of the inner Cr-rich layer,and that after oxidation at 1050℃ for 200 h,it almost exhibits the linear oxidation kinetics possible due to the volatility of Cr-rich oxide.A mixed scale forms on the alloy after prolonged oxidation.The oxide scale formed at 900 and 1000℃ is composed of an outer layer of spinel and an inner continuous Cr-rich layer and at 1050℃ is composed of a very discontinuous Cr-rich layer.
%K Co-base superalloy
%K Oxidation
%K Kinetics
%K Microstructure<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=CC424F66D80D36E75FDA1FB1931CA3D7&yid=67289AFF6305E306&vid=B91E8C6D6FE990DB&iid=B31275AF3241DB2D&sid=899CC9158FC43EF4&eid=38DB5AF4AD8FDCCA&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=20