%0 Journal Article
%T Role of Y4Al2O9 in High Temperature Oxidation Resistance of NiCoCrAlY-ZrO2 Y2O3 Coatings<br>Role of Y4Al2O9 in High Temperature Oxidation Resistance of NiCoCrAlY-ZrO2.Y2O3 Coatings
%A Shuqin YANG
%A Xiaohua LAN
%A Ningkang HUANG
%A <br>Shuqin
%A YANG
%A Xiaohua
%A LAN
%A Ningkang
%A HUANG
%J 材料科学技术学报
%D 2007
%I 
%X NiCoCrAlY-ZrO2·Y2O3 coatings were deposited on the substrates by using a technology of combining electron,atom and ion beams (three beams). Isothermal oxidation for these samples was performed at 1100℃ for 100-300 h. The results show that a thermally grown oxide (TGO) layer was formed between NiCoCrAlY layer and oxidation. The TGO contains α-Al2O3 and Y4Al2O9 etc. oxides. The intensity ratio of α-Al2O3/Y4Al2O9 was monotonously decreased with increasing oxidation time based on XRD (X-ray diffraction) analysis. The Y4Al2O9 phase plays the most important role in high temperature oxidation resistance at 1100℃. The related mechanism was also discussed.
%K XRD
%K Al2Y4O9<br>NiCoCrAlY-ZrO2·Y2O3
%K coatings
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=AB2D01E2826F9BB6&yid=A732AF04DDA03BB3&vid=EA389574707BDED3&iid=E158A972A605785F&sid=6D6B4A516C7DB6EE&eid=18F040DBCB74FFF9&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=22