%0 Journal Article
%T Oxidation Behavior of Bilayered Ceramic Particle-reinforced Enamel Composite Coating on Nickel-based Superalloy K38G at 1000℃<br>镍基高温合金上双层搪瓷-陶瓷复合涂层1000℃氧化机理
%A SHEN Ming-li
%A ZHU Sheng-long
%A WANG Fu-hui
%A <br>沈明礼
%A 朱圣龙
%A 王福会
%J 腐蚀科学与防护技术
%D 2012
%I 
%X A bilayered enamel-ceramic composite coating,consisted of an inner layer of enamel-50 mass%corundum and an outer layer of enamel-50 mass%quartz,was prepared on nickel-based superalloy K38G by spray-sintering technique.The coating is dense with glaze surface and has good adhesion to the substrate.Its oxidation behavior at 1000°C for 120 h was studied by means of thermogravimetry,SEM,EDS and XRD.Cristobalite,a high-temperature polymorph of quartz, and zircon and albite precipitates were detected in the as-prepared enamel-ceramic composite coating.In addition,Ni,Co and Cr were present in the inner layer of enamel-corundum.The mass gain of the coated alloy after 120 h oxidation was about 0.2 mg/cm~2,quite lower than those of NiCrAlY coatings.Most of the quartz particles in the coating transformed into cristobalite after oxidation tests.Besides,orthoclase was detected too.Ni-enrichment was observed in the outermost region of the outer layer,while Cr-enrichment was found in the inner layer close to the inner/outer interface.And Ni-,Cr-,Al-enrichment were found in the inner layer near the substrate either of the as-prepared samples or of the samples after oxidation tests.
%K bilayered enamel-ceramic composite coating
%K high temperature oxidation
%K nickel-based superalloy<br>搪瓷-陶瓷复合涂层
%K 高温氧化
%K 镍基高温合金
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=9F6E6EC8BA5BB62698F6640073DDD6E1&aid=36464541183B84FAB9037163C57E83B1&yid=99E9153A83D4CB11&vid=B91E8C6D6FE990DB&iid=CA4FD0336C81A37A&sid=F3090AE9B60B7ED1&eid=F3583C8E78166B9E&journal_id=1002-6495&journal_name=腐蚀科学与防护技术&referenced_num=0&reference_num=13