The Effect of Laser Glazing on High Temperature Oxidation Resistance of Thermal Barrier Coatings
Thermal barrer coatings(TBCs)have been widely used by aero and Iand based gas turbines to protect hot section parts from oxidation and thermal loads．These coatings are generally consisting of multiple layers of coating (usually two) with each layer having a specific function．TBCs are generally deposited with air plasma spray(APS)or electron beam physical vapor deposition(EB-PVD) techniques．In this paper plasma sprayed TBCs were deposited on to 304 stainless steel substrates then ceramic surfaces were glazing with Nd-YAG laser.Metallographic examinations were applied to the samples to investigate microstruetural changes in glazed ceramic layer．Both glazed and as-coated samples were subjected to oxidation tests to measure the high temperature oxidation resistance．The tests showed that．laser glazing is beneficial to oxidation resistance of TBCs．This improvement is attributed to sintering of zirconia laver which act as oxygen barrier and formed during glazing process．
Thermal barrier coatings laser glazingt high temperature oxidation resistance test
Seyid Fehmi Diltemiz Melih Cemal Kushan
Osmangazi University Graduate School of Science,Eskisehir.Turkev Osmangazi University Dept.of.Engineering and Architecture Eskisehir,Turkey
国际会议
海口
英文
6-8
2011-02-22（万方平台首次上网日期，不代表论文的发表时间）