通过热浸镀Al及高温氧化法制备出梯度防氚渗透涂层, 并系统研究了稀土元素Ce对涂层微观结构及性能的影响. 热浸镀Al所获得的涂层包括表面Al层和Fe-Al中间合金层,在热浸镀Al过程中, Fe-Al合金层的厚度随浸镀液中Ce含量的增加而增大,且与基体间的接触方式逐渐由平面接触转为锯齿状接触, 从而提高了Fe-Al层与基体的结合强度. 经过850 ℃条件下保温4 h的扩散处理, 获得了Al含量呈梯度分布的Al2O3/Al/Fe--Al涂层, 这种梯度涂层有效地消除了热应力失配现象.对涂层的性能测试结果表明, 浸镀液中Ce含量的添加也提高了涂层的抗热震和抗高温氧化性能.
The gradient tritium permeation barrier was fabricated on CLAM steel substrate by hot dip aluminizing (HDA) and subsequent high–temperature diffusion treatment. The effect of Ce element on the microstructure and properties were investigated systematically. The Fe–Al layer with larger thickness and conspicuous serrated interface bonding with the substrate was achieved and the bonding strength of the coating was improved when the content of Ce increase. The gradient distribution of aluminized coating from surface to inter was obtained after thermal diffusion at 850 ℃for 4 h, the gradient coating reduces the thermal stress effectively. The result of the coating properties indicates that the thermal shock resistance and oxidation resistance at high temperature of the coating were also improved with the addition of Ce element.
[1] Smith D L, Konys J, Muroga T. Nucl Mater, 2002; 307: 1314
[2] Smith D L, Park J H, Lyublinski I. Fusion Eng Des, 2002; 61: 629
[3] Aiello A, Ciampichetti A, Benamati G. Nucl Mater, 2004; 329: 1398
[4] Causey R A, Wampler W R. Nucl Mater, 1995; 220: 823
[5] Shan C Q, Wu A J, Li Y J. Nucl Mater, 1992; 191: 221
[6] Liu H B, Tao J, Zhang P Z, Xu J. Mater Rev, 2006; 20(9): 47
(刘红兵, 陶杰, 张平则, 徐江. 材料导报, 2006; 20(9): 47)
[7] Huang Q Y, Li C J, Li Y F, Liu S J, Song Y. Atomic Energy Sci Technol, 2007; 41(supp.): 397
(黄群英, 李春京, 李艳芬, 刘少军, 宋勇. 原子能科学技术, 2007; 41(增刊): 397)
[8] Choy K L. Prog Mater Sci, 2003; 48: 57
[9] Hao J K, Shan C Q, Jin Z J, Chen Q W. Nucl Fusion Plasma Phys, 1996; 16(2): 62
(郝嘉馄, 山常起, 金柱京, 陈庆旺. 核聚变与等离子体物理, 1996; 16(2): 62)
[10] Perujo A, Serra E. Nucl Mater, 1996; 233: 1102
[11] Chen H, Sang G. Corros Sci Prot Technol, 2010; 31(4): 268
(陈镐, 桑革. 腐蚀与防护, 2010; 31(4): 268)
[12] Sun W C. The Behavior of Rare Earth in Aluminium Alloy. Beijing: Chemical Industry Press, 1992: 28
(孙伟成. 稀土在铝合金中的行为. 北京: 化学工业出版社, 1992: 28)
[13] Bahadur A, Mohanty O N. Trans JIM, 1991; 32: 1053
[14] Zhang W, Wen J B, Zhang J M, Fan Z K. Chin Rare Earths, 2005; 26(6): 29
(张伟, 文九巴, 张金民, 范志康. 稀土, 2005; 26(6): 29)
[15] Li C P, Liu X Z, Tian J F, Gao Y Y. Acta Metall Sin, 1989; 25: A382
(李翠屏, 刘兴志, 田继丰, 高允彦. 金属学报, 1989; 25: A382)
[16] Larikov L N. Protect Coatings Met, 1971; 3: 66
[17] Li M S. High Temperature of Metals. Beijing: Metallurgical Industry Press, 2001: 187
(李美栓. 金属的高温腐蚀. 北京: 冶金工业出版社, 2001: 187)
[18] Zhang W, Fan Z K, Guo X J, Wen J B, Zhang J M. J Aeronaut Mater, 2006; 26(2): 16
(张伟, 范志康, 郭献军, 文九巴, 张金民. 航空材料学报, 2006; 26(2): 16)
