摘要
Magnetron-sputter deposition was used to produce Ti-48Al-8Cr-2Ag coating on a cast alloy substrate with the same composition. Hot corrosion was carried out in molten (Na,K)2SO4 and Na2SO4+NaCl at 900 ℃. The sputtered nanocrystalline coating shows much better hot-corrosion resistance in molten (Na,K)2SO4 as a result of the formation of a continuous and compact Al2O3 scale. The nanocrystallization of TiAlCrAg alloy prolongs the incubation of breakaway corrosion and improves the hot-corrosion resistance of TiAlCrAg alloy in molten Na2SO4+NaCl. The relevant corrosion mechanism was discussed.
Magnetron-sputter deposition was used to produce Ti-48Al-8Cr-2Ag coating on a cast alloy substrate with the same composition. Hot corrosion was carried out in molten （Na,K）2SO4 and Na2SO4＋NaCl at 900 ℃. The sputtered nanocrystalline coating shows much better hot-corrosion resistance in molten （Na,K）2SO4 as a result of the formation of a continuous and compact Al2O3 scale. The nanocrystallization of TiAlCrAg alloy prolongs the incubation of breakaway corrosion and improves the hot-corrosion resistance of TiAlCrAg alloy in molten Na2SO4＋NaCl. The relevant corrosion mechanism was discussed.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2006年第3期511-516,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(59971052) supported by the National Natural Science Foundation of China
