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A selective oxidation technique has been applied to form a diffusion barrier on the Ni-based superalloy substrate by heating the substrate with electron beam of the electron beam-physical vapor deposition (EB-PVD) facility. The interdiffusion behavior, cross-sectional morphology, isothermal and cyclic oxidations were studied for thermal barrier coatings (TBCs) with and without diffusion barrier. Under...
The formation of diffusion barrier on the Ni-based superalloy substrate by low-pressure pre-oxidation is studied in this paper. The pre-oxidation was carried out by heating the substrate under a low-oxygen partial pressure with electron beam of the electron beam physical vapor deposition (EB-PVD) facility. The effect of diffusion barrier was investigated by both isothermal and cyclic oxidations at...
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