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標題: 電解沈積氧化鋁/氧化釔複合及雙層陶瓷膜於IN617超合金上之研究
Electrolytic Deposition of Al2O3/Y2O3 Ceramic film on IN617 Superalloy
作者: 張子能
關鍵字: Al2O3/Y2O3 double-layer/mix ceramic film;氧化鋁/氧化釔雙層複合陶瓷;electrolytic deposition;IN617 superalloy;IN617超合金;電解沈積
出版社: 材料工程學研究所
1.氧濃度極限電流控制 O2+2H2O+4e-→4 OH-
(2)電解水H2O+e- → OH-+H2

In this study, IN617 superalloy was coated with Al2O3/Y2O3 double-layer and mixed layer ceramic films by electrolytic deposition. The characterizations of the different coating deposited in Al(NO3)3 ,Y(NO3)3 aqueous solutions and also their mixed aqueous solution were investigated:
Through the analysis of the cathodic polarization experiments in Y(NO3)3 , H2O, NaNO3 and HCl aqueous solutions, respectively, the mechanism of electrolytic Y2O3 was also investigated. It was found the cathodic behavior of Y(NO3)3 can be divided into two main stages:
(1) O2+2H2O+4e-→4 OH-
(2)H2O+e- → OH-+H2
After that, coated specimens were further characterized by XRD, SEM/EDX, aqueous corrosion tests in 3.5% NaCl and 0.5M Na2SO4, hot corrosion Na2SO4 contained environment and scratch tests. The coated alloy showed much better performances in oxidation and corrosion resistance than the uncoated. Meanwhile, the adhesion between coated film and substrate is grater than the yield stress of substrate.
Appears in Collections:材料科學與工程學系

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