Inhibiting effect of Ni-Re interlayer between Ni-Al coating and steel substrate on interdiffusion and carburization

Inhibiting effect of Ni-Re interlayer between Ni-Al coating and steel substrate on interdiffusion and carburization
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Ni-Al镀层与钢基体之间Ni-Re中间层对相互扩散和渗碳的抑制作用

DOI:
10.1016/j.surfcoat.2017.12.065
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发表时间:
2018-03
影响因子:
5.4
通讯作者:
Zhou Chungen
Zhou Chungen
中科院分区:
材料科学1区
文献类型:
--
作者:
Li Meifeng;Li Na;Zhang Jianqiang;Zhou Chungen

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在Ni-Al镀层和铁合金基体之间电镀一层Ni-Re膜作为扩散阻挡层。通过微观结构分析研究了涂层与基体之间的互扩散行为,并采用Boltzmann-Matano方法计算了互扩散系数。结果表明,Ni-Re中间层起到了上级阻挡作用,几乎完全阻挡了互扩散,延缓了扩散区的形成。在渗碳过程中,无扩散阻挡层的Ni-Al涂层在扩散区发生了严重的渗碳腐蚀,而有Ni-Re扩散阻挡层的Ni-Al涂层有效地保护了钢基体免受碳的侵蚀。
A Ni-Re film was electroplated as a diffusion barrier between the Ni-Al coating and the iron alloy substrate. The interdiffusion between the coating and the substrate was investigated by micro-structure analysis, and the interdiffusion coefficient was calculated using Boltzmann-Matano method. The results indicated that the Ni-Re interlayer played a superior barrier effect, almost fully blocking interdiffusion and retarding the formation of diffusion zone (DZ). The Ni-Al coating without a diffusion barrier showed severe carburization corrosion in the diffusion zone during carburization process, while the Ni-Al coating with the Ni-Re diffusion barrier effectively protected the steel substrate from carbon attack.
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