Preparation and properties of ceramic Al2O3 coating as TBCs on MCrAly layer applied on Inconel alloy by cathodic plasma electrolytic deposition
Preparation and properties of ceramic Al2O3 coating as TBCs on MCrAly layer applied on Inconel alloy by cathodic plasma electrolytic deposition
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DOI：
10.1016/j.surfcoat.2011.10.060
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发表时间：
2013-08
影响因子：
5.4
通讯作者：
E. Bahadori;S. Javadpour;M. H. Shariat;F. Mahzoon
中科院分区：
文献类型：
--
作者：
E. Bahadori;S. Javadpour;M. H. Shariat;F. Mahzoon
Inconel合金（IN 738）在耐高温材料等行业中有着广泛的应用。此外，已经开发了不同的表面处理和涂层来改善Inconel合金的性能。采用阴极等离子体电解沉积法（CPED）在镍基高温合金基体MCrAly表面沉积Al 2 O3陶瓷涂层。CPED过程在Al（NO3）3·9 H2O（18 g/l）的乙醇溶液中进行。在不同的沉积条件下获得了几个样品，并使用XRD，SEM和EDS进行了分析。XRD分析表明，样品中存在Al 2 O3和Ni 3Al相。基于热膨胀，这与用作粘结涂层的MCrAlY的组成一致。SEM照片显示了在不同pH值的溶液中，随着溶液pH值的变化，试样的微观结构发生了变化。
Inconel alloys (IN738) have found a wide range of applications in industries such as high-temperature resistance materials. Furthermore, different surface treatments and coatings have been developed for improving the properties of Inconel alloys. In this study, Al2O3as a ceramic coating was deposited on the surface of the MCrAly as a ground coat layer on Ni-based super alloy, by cathodic plasma electrolytic deposition (CPED). The CPED process was carried out in Ethanol solution of Al (NO3)3.9H2O (18g/l). Several samples were obtained in different deposition conditions and analyzed using XRD, SEM and EDS. The XRD analysis shows the presence of Al2O3and Ni3Al phases. Based on thermal expansion, this is in agreement with the composition of the MCrAlY used as bond coat. SEM micrograph showed changes in microstructure of specimen by varying the pH of the solution in different PH of solutions.