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The failure of air-plasma-sprayed thermal barrier coatings (APS TBCs) with conventional pack aluminide and slurry Si-modified aluminide bond coats on superalloy In-738LC was investigated during a thermal-shock test. Thermal shock experiments consisted of rapid thermal cycling between 1100°C and 300°C for 120times. It was found that the lifetime of APS TBCs on aluminide bond coats can be extended by...