%0 Journal Article
%T Protective Effect of the Sputtered TiAlCrAg Coating on the High-Temperature Oxidation and Hot Corrosion Resistance of Ti-Al-Nb Alloy
%A Yanjun XI
%A Fuhui WANG
%A Lianlong HE
%A <br>Yanjun XI
%A Fuhui WANG and Lianlong HEState Key Laboratory for Corrosion & Protection
%A Institute of Metai Research
%A Chinese Academy of Sciences
%A Shenyang
%A ChinaShenyang National Laboratory for Materials Science
%A Institute of Metai Research
%A Chinese Academy of Sciences
%A Shenyang
%A China
%J 材料科学技术学报
%D 2004
%I 
%X The effect of a sputtered Ti-48Al-8Cr-2Ag (at. pct) coating on the oxidation resistance of the cast Ti-46.5Al-5Nb (at. pct) alloy was investigated in air at 1000～1100℃. Hot corrosion in molten 75 wt pct Na2SO4 25 wt pct K2SO4 was investigated at 900℃. The scale on the cast TiAlNb tends to spall in air, while the scale on coating is very adherent. The sputtered Ti-48Al-8Cr-2Ag coating remarkably improved high temperature oxidation resistance of the cast Ti-46.5Al-5Nb alloy because of the formation of an adherent Al2O3 scale. Due to the inward diffusion of Cr,Kirkendall voids were found at the coating/substrate interface. TiAlCrAg coating provided excellent hot corrosion resistance for TiAlNb alloy in molten 75 wt pct Na2SO4 25 wt pct K2SO4 at 900℃ due to the formation of a continuous Al2O3 scale.
%K High temperature oxidation
%K TiAlCrAg coating
%K Hot-corrosion<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=7C2E6B7AE786A9D1CD49675C72FC79A3&yid=D0E58B75BFD8E51C&vid=A04140E723CB732E&iid=B31275AF3241DB2D&sid=94655B9881133A28&eid=0EE24608F5763811&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=19