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The isothermal and cyclic oxidation behaviour of two Co modified aluminide coatings together with the simple aluminide coating were performed at 1000°C and 1100°C. All the three coatings show a much lower oxidation rate compared with the bare alloy. Results also indicate the addition of Co to the aluminide coating decreases the oxidation resistance slightly. It can be ascribed to that Co is easier...
Ion-plated Al–Al 2 O 3 cermet films were fabricated as diffusion barriers between NiCrAlY coating and orthhombic-Ti 2 AlNb alloy. The oxidation and interdiffusion behaviour of coatings with and without diffusion barrier were investigated in isothermal and cyclic oxidation tests at 800°C. The results indicated that substantial interdiffusion and rapid oxidation degradation occurred...
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