欢迎登录材料期刊网

材料期刊网

高级检索

采用在Ni基上复合电镀Ni-Al2O3纳米复合涂层后在1100 ℃扩散渗铬3 h的方法,制备Al2O3改性的渗铬涂层.作为对比,采用相同的工艺在单Ni镀层上直接渗铬,获得一种不含Al2O3纳米粒子的渗铬涂层.SEM/EDS和TEM结果表明:Al2O3纳米颗粒均匀分布在Ni纳米晶中, 纳米Al2O3颗粒的加入不仅细化基体Ni的晶粒尺寸,而且明显抑制在渗铬过程中涂层晶粒的长大.900 ℃, 120 h的氧化试验结果表明:与不含Al2O3纳米粒子的渗铬涂层相比,Al2O3改性的渗铬涂层所具有的细晶结构促进了保护性氧化物形成元素Cr沿晶界向氧化前沿的快速扩散,从而有利于保护性Cr2O3氧化膜的快速形成,同时改变氧化膜的形成过程,降低氧化速度,使得Al2O3改性的渗铬涂层表现出更优异的抗氧化性能.并对Al2O3渗铬涂层的组织及氧化机制进行了分析.

参考文献

[1] Atkinson H V .[J].Oxidation of Metals,1985,24:177.
[2] Goward G W.[J].Materials Science and Technology,1986(02):194.
[3] Goward G W;Boone D H .[J].Oxidation of Metals,1971,3:475.
[4] Zhou W;Zhao Y G;Li W et al.[J].Materials Science and Engineering A,2007,458:34.
[5] Zhu L;Peng X;Yan J et al.[J].Oxidation of Metals,2004,62:411.
[6] Yan J;Peng X;Wang F .[J].Materials Science and Engineering A,2006,426:266.
[7] Zhang H;Peng X;Zhao J et al.[J].Electrochemical and Solid-State Letters,2007,10(03):C12.
[8] Zhou YB;Chen H;Zhang H;Wang Y .Preparation and oxidation of an Y2O3-dispersed chromizing coating by pack cementation at 800 degrees C[J].Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology,2008(8):748-753.
[9] Zhou Y B;Zhang H J;Wang Z T .[J].Corrosion Reviews,2008,26(01):39.
[10] ZHOU Yue-bo,ZHANG Hai-jun,WANG Zhen-ting.Effect of Y2O3 on microstructure and oxidation of γ-Ni+γ'-Ni3Al coatings transformed from electrodeposited Ni-Al films at 1 000 ℃[J].中国有色金属学会会刊(英文版),2008(02):297-302.
[11] Zhou Yuebo;Chen Hongyu;Zhang Haijun .[J].Transactions of Nonferrous Metals Society of China,2008,18(03):589.
[12] Hou P Y;Stringer J .[J].Oxidation of Metals,1988,29:45.
[13] Mitra S K;Roy S K;Bose S K .[J].Oxidation of Metals,1990,34:101.
[14] Cotekk C M;Yuerk G J;Hussey R J et al.[J].Oxidation of Metals,1990,34:173.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%