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High-throughput preparation and characterization of early hot-corrosion behaviors of compositional gradient Al–Cr complex coatings on a novel Co–Al–W-based alloy
Corrosion Science ( IF 7.4 ) Pub Date : 2021-09-03 , DOI: 10.1016/j.corsci.2021.109811
L.L. Fan 1 , Y. Li 1 , X.Y. Zhao 1 , Y.X. Yu 1 , C.G. Zhou 1 , J.B. Sha 1
Affiliation  

High-throughput characterization of early hot-corrosion behaviors of compositional gradient Al–Cr complex coatings on a novel Co–Al–W alloy prepared by multi-arc ion plating technology at 1000–1100 °C for 10–30 min was conducted for the first time. As deposited, the coatings showed a laminate microstructure composed of various Al–Cr compounds. After corrosion, a three-layer structure formed between the coating and the substrate, with an outermost layer composed of α-Al2O3 + α-Cr2O3, an inter-diffusion layer, and an innermost reaction layer containing B2-CoAl + μ-Co7(W0.8Cr0.2)6. Finally, the early hot-corrosion mechanism of the gradient Al–Cr complex coatings was discussed.



中文翻译:

新型 Co-Al-W 基合金上成分梯度 Al-Cr 复合涂层的高通量制备和早期热腐蚀行为表征

通过多弧离子镀技术制备的新型 Co-Al-W 合金上的成分梯度 Al-Cr 复合涂层的早期热腐蚀行为的高通量表征在 1000-1100 °C 下进行 10-30 分钟第一次。沉积时,涂层显示出由各种 Al-Cr 化合物组成的层压微观结构。腐蚀后,涂层与基体之间形成三层结构,最外层为α-Al 2 O 3 + α-Cr 2 O 3,相互扩散层,最内层为含B 2 的反应层-CoAl + μ-Co 7 (W 0.8 Cr 0.2 ) 6. 最后,讨论了梯度Al-Cr复合涂层的早期热腐蚀机理。

更新日期:2021-09-10
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