%0 Journal Article
%T EFFECT OF Al_2O_3 COATING ON HOT CORROSION OF SUPERALLOY K38G<br>Al_2O_3涂层对高温合金K38G热腐蚀的影响
%A WANG Fuhui
%A ZHU Shenglong
%A LOU Hanyi
%A WU Weitao
%A <br>王福会
%A 朱圣龙
%A 楼翰一
%A 吴维
%J 腐蚀科学与防护技术
%D 1993
%I 
%X Hot corrosion behavior of Ni-base superalloy K38G with Al_2O_3 coating was investigated in air at 1123K by applying (Na,K)_2SO_4 salt deposit. The Al_2O_3 coating was prepared by means of DC reactive sputtering, which improved the corrossion resistance of superalloy K38G. Both the basic fluxing and the oxidation-sulfidation occurred during the incubation period of the uncoated specimensm whereas they were alleviated by the application of the Al_2O_3 coating. For example, the depth of internal salfidation layer was minimized 3 times. It was also observed that the Al_2O_3 coating was scarcely thinned during corrosion. Some (Al,Cr)_2O_3 pillars and the TiO_2 needles were found at the coating / salt interface for the coated specimen. The mechanisms of the influence of the Al_2O_3 coating on hot corrosion of K38G alloy was discussed.
%K Al_2O_3 coating
%K hot corrosion
%K superalloy<br>热腐蚀
%K 耐热合金
%K 氧化铝
%K 涂层
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=9F6E6EC8BA5BB62698F6640073DDD6E1&aid=D3EFE1EA40009E7B62500265C5C50D21&yid=D418FDC97F7C2EBA&vid=94C357A881DFC066&iid=CA4FD0336C81A37A&sid=9971A5E270697F23&eid=42425781F0B1C26E&journal_id=1002-6495&journal_name=腐蚀科学与防护技术&referenced_num=0&reference_num=5