Creative Preparation of High-oxidation Resistant Coating on Nb-base Heat-resistant Alloys using Molten-salt Electrodeposition and Self-systematization

熔盐电沉积自系统化创新制备铌基耐热合金高抗氧化涂层

• 批准号: 23560860
• 负责人: HARA Motoi
• 金额: $ 3.41万
• 依托单位: Akita University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560860/
• 关键词: コーティング; 耐酸化性; 電析; 溶融塩; ニッケルアルミナイド; ニオブ基合金; 自己組織化; 耐酸化コーティング; 溶融塩電析; 高温酸化; 耐熱合金; Nb基合金; Niアルミナイド; アルミナ皮膜

Coatings of Ni aluminide/Ni bilayer on Nb-W and Nb-W-Mo alloys were prepared by the electrodeposition of Al using a molten salt electrolyte after the Ni electrodeposition. The coating specimen with a thin Ni layer showed a vigorous oxidation during the initial period. On the contrary, the coating specimen with a thick Ni layer showed a high oxidation resistance. For the coating specimen with a thick Ni layer, intermediate layers consisting of Ni-Nb alloys were formed by the diffusion of the Ni layer and the alloy substrate during the oxidation test. These intermediate layers contributed the maintenance of a high concentration of Al in the surface layer and the suppression of spallation of the layers, leading to the improvement in the oxidation resistance of the coating.

在Ni电沉积后，采用熔盐电解液电沉积Al，在Nb-W和Nb-W- mo合金表面制备了Ni铝化物/Ni双层镀层。薄镍层涂层试样在初始阶段表现出强烈的氧化反应。相反，Ni层较厚的涂层试样具有较高的抗氧化性。对于Ni层较厚的涂层试样，在氧化试验过程中，Ni层与合金基体扩散形成由Ni- nb合金组成的中间层。这些中间层有助于维持表层高浓度的Al，抑制层的剥落，从而提高涂层的抗氧化性。

项目成果

Nb-W合金上へのNiアルミナイド/Ni２層コーティングとその耐酸化性

Nb-W合金的Ni铝化物/Ni双层镀层及其抗氧化性能

• 发表时间: 2012
• 作者: N. Sato;M. Fuji;N. Kohiruimaki;M. Fukimoto and M. Hara;佐藤菜花，藤 雅彦，茨木 啓，福本倫久，原 基
• 通讯作者: 佐藤菜花，藤 雅彦，茨木 啓，福本倫久，原 基

Prepartion of Ni Aluminide/Ni Bilayer Coating on Nb-W Alloys by Molten Salt Electrodeposition and Oxidation Resistance

熔盐电沉积铌钨合金镍铝化物/镍双层镀层的制备及抗氧化性能

• 发表时间: 2014
• 作者: N. Sato;M. Fuji;N. Kohiruimaki;M. Fukimoto and M. Hara
• 通讯作者: M. Fukimoto and M. Hara