Formation and cyclic oxidation resistance of Hf-Co-modified aluminide coatings on nickel base superalloys
Formation and cyclic oxidation resistance of Hf-Co-modified aluminide coatings on nickel base superalloys
复制标题
镍基高温合金上Hf-Co改性铝化物涂层的形成及其抗循环氧化性能
DOI：
10.1016/j.matchemphys.2013.09.016
复制
发表时间：
2014-02
影响因子：
4.6
通讯作者：
Chungen Zhou
中科院分区：
文献类型：
--
作者：
Haixia Li;Min Qiao;Chungen Zhou
本工作研究了通过一步法包渗在镍基高温合金上共沉积 Co、Al 和 Hf。应用热化学分析来寻找合适的条件，包括包装成分和沉积温度。 Co、Al、Hf、NH4Cl、NH4I和Al2O3组成了包粉混合物。根据一系列热化学计算，采用20Co–10Al–2Hf–4NH4Cl–4NH4I–60Al2O3(wt.%)的粉末混合物。进一步的实验结果表明Co、Al和Hf的共沉积是可以实际实现的。涂层由扩散区和外层组成。外层主要由Al0.9Ni1.1组成，其中部分Ni被Co或Hf替代。微量元素Hf富集在外层与扩散区的界面处。由于氧化皮与涂层之间的附着力提高，Co-Al-Hf涂层表现出优异的抗循环氧化性能。
The codeposition of Co, Al and Hf on nickel base superalloys by pack cementation in a single-step process was investigated in this work. Thermochemical analyses were applied to search for suitable conditions including pack composition and deposition temperature. Co, Al, Hf, NH4Cl, NH4I and Al2O3made up the pack powder mixture. According to a series of thermochemical calculations, the pack powder mixture of 20Co–10Al–2Hf–4NH4Cl–4NH4I–60Al2O3(wt.%) was adopted. Further experimental results demonstrated that the codeposition of Co, Al and Hf could be achieved practically. The coating consisted of a diffusion zone and an outer layer. The outer layer was mainly composed of Al0.9Ni1.1where a part of Ni was replaced by Co or Hf. The trace element Hf was enriched in the interface between the outer layer and the diffusion zone. The Co–Al–Hf coating exhibited excellent cyclic oxidation resistance due to improvement in adhesion between the oxide scale and the coating.
登录
查看更多内容
影响因子：
5.4
作者：
H. Du;J. Kipkemoi;D. Tsipas;P. K. Datta
通讯作者：
H. Du;J. Kipkemoi;D. Tsipas;P. K. Datta
影响因子：
5.4
作者：
Wang, YongQing;Suneson, Marc;Sayre, Guy
通讯作者：
Sayre, Guy
β-NiAl 与各种活性元素掺杂剂在 1200 摄氏度下的循环氧化
影响因子：
8.3
作者：
Li, Dongqing;Guo, Hongbo;Xu, Huibin
通讯作者：
Xu, Huibin
影响因子：
8.3
作者：
K. Shirvani;M. Saremi;A. Nishikata;T. Tsuru
通讯作者：
K. Shirvani;M. Saremi;A. Nishikata;T. Tsuru
影响因子：
2.1
作者：
Hongbo Guo;Lidong Sun;He-fei Li;S. Gong
通讯作者：
Hongbo Guo;Lidong Sun;He-fei Li;S. Gong