Exploring the potential for simultaneous enhancement of mechanical, wear and corrosion performance of the CrB2 protective film actuated by soluting Si
Exploring the potential for simultaneous enhancement of mechanical, wear and corrosion performance of the CrB2 protective film actuated by soluting Si
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DOI：
10.1016/j.ceramint.2023.08.181
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发表时间：
2023-08
影响因子：
5.2
通讯作者：
Yiwei Li;Chuanyao Dong;X. Gu;J. Pan;Rui Zhang;Zhixuan Mu;Mao Wen;Kan Zhang
中科院分区：
文献类型：
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作者：
Yiwei Li;Chuanyao Dong;X. Gu;J. Pan;Rui Zhang;Zhixuan Mu;Mao Wen;Kan Zhang
船舶设备的运动部件必须面对高湿、高盐度的环境，提高其在这种恶劣环境下的稳定性和耐久性是十分必要的。开发高硬度、耐磨、耐腐蚀的薄膜来保护运动部件是有效的方法。在本文中，我们在二元crb2薄膜中引入0 ~ 14.5 at%的Si含量，以提高其综合性能，并在CrSiB固溶体中引入两种结构Si含量的样品(3.5 at。%, 6.1 at。%和7.3。% Si)和CrSiB/Si纳米复合材料(10.1 at。%和14.5%。% Si)。与二元crb2和CrSiB/Si纳米复合材料相比，CrSiB固溶体膜具有6.1 at。% Si合金的硬度最高，为23.23±0.26 GPa，主要受固溶强化和晶界强化作用的影响。此外，CrSiB固溶体膜具有6.1 at。由于最高的th3 / e2值为0.178，% Si的磨损率也最低，为5.18 × 10−8mm3/Nm。此外，CrSiB固溶体膜具有最佳的耐蚀性，这是因为该膜具有最厚的钝化层和最小的空位缺陷以及高质量的晶体结构，可以有效地阻止Cl−通过薄膜到达基底。该研究突出了一种具有综合性能、满足严格应用条件的有前途的保护薄膜结构。
The moving parts in marine equipment have to face the high humidity and high salinity, improving the stability and durability in such harsh conditions is necessary. Developing the thin films with high hardness, wear resistance and corrosion resistance to protect the moving parts is an effective method. In this work, we introduce Si contents ranging from 0 to 14.5 at% in binary CrB2film to enhance their comprehensive properties, and two structure Si contained sample with the CrSiB solid solution (3.5 at. %, 6.1 at. % and 7.3 at. % Si) and the CrSiB/Si nanocomposite (10.1 at. % and 14.5 at. % Si) are obtained. In comparison to the binary CrB2and CrSiB/Si nanocomposite, the CrSiB solid solution film with 6.1 at. % Si exhibits the highest hardness of 23.23 ± 0.26 GPa, owing to the solid solution strengthening and grain boundary strengthening effects. Additionally, the CrSiB solid solution film with 6.1 at. % Si also exhibits the lowest wear rate with 5.18 × 10−8mm3/Nm due to the highestH3/E2value of 0.178. Moreover, the CrSiB solid solution film has the best corrosion resistance, this is because the thickest passivation layer with the minimal vacancy defects and the high-quality crystal structure of the film, which could effectively prevent Cl−from reaching the substrate through the film. This study highlights a promising structure for the protective thin film with comprehensive properties that meet stringent application conditions.