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A method to enhance the adherence of Al2O3 coating with AISI 316L metallic substrate was proposed in this study. The substrate was aluminized by pack cementation at 850°C for 10h, and then oxidized at 900°C for 10h, subsequently, the Al2O3 whiskers formed uniformly. The suspension mixing 3μm γ-Al2O3 powder, alumina sol, PVA and water was directly applied to the microchannels pretreated by above mentioned...
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