Studies on thermally grown oxide as an interface between plasma-sprayed coatings and a nickel-based superalloy substrate

查看全文 作　　者：Adam Khan Mahaboob [1]Basha;Sundarrajan [2]Srinivasan;Natarajan [2,3]Srinivasan

机构地区：[1]Department of Mechanical Engineering, Centre for Surface Engineering, Kalasalingam University, Krishnankoil 626126, Tamil Nadu, India;[2]Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirapalli 620015, Tamil Nadu, India;[3]Centre of Excellence in Corrosion and Surface Engineering (CECASE), National Institute of Technology, Tiruchirapalli 620015, Tamil Nadu, India

出　　处：《International Journal of Minerals,Metallurgy and Materials》索引2017年第24卷第6期,共10页

摘　　要：A thermally grown oxide layer formed by hot corrosion was investigated as an interface between plasma-sprayed coatings and a nickel-based superalloy substrate. The hot corrosion mechanism of NiCr–Cr_2O_3 and Al_2O_3–40wt% TiO_2(A40T) plasma coated Inconel 617 was evaluated. The experiments were carried out at 1000°C using a combination of Na_2SO_4, NaCl, and V_2O_5 salts to simulate the conditions of a gas turbine in a marine environment. The hot corrosion results revealed the spallation and dissolution of oxides upon prolonged exposure. Optical images and scanning electron micrographs of the exposed samples revealed the formation of oxide scale and provided details of its morphology in NiCr–Cr_2O_3 coated samples. Microstructure characterization of A40T coatings demonstrated a thermally grown oxide(TGO) layer at 1000°C. Increasing the thickness of the TGO layer decreased the corrosion resistance. The elemental analysis and image mapping revealed the migration of active elements from the substrate and coatings toward the corrosive environment. 关键词：CORROSION COATINGS SUPERALLOY OXIDES

相关文献

参考文献（38）
引证文献（2）
耦合文献（15）

参考文献(38)

引证文献(2)

耦合文献(15)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Studies on thermally grown oxide as an interface between plasma-sprayed coatings and a nickel-based superalloy substrate

参考文献(38)

引证文献(2)

耦合文献(15)

用户提示