Influence of MoSi2 on the microstructure and elevated-temperature wear properties of Inconel 718 coating fabricated by laser cladding
Department中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心
Lu, Shisheng1,2; Zhou, Jiansong1,2; Wang, Lingqian1; Liang, Jun1,2
The second department金属基高温润滑材料组
2021-10-25
Source PublicationSurface & Coatings Technology
Issue424Pages:1-12
Abstract

In the present study, the MoSi2 reinforced Inconel 718 composite coatings were fabricated by laser cladding, aiming at improving the hardness and elevated-temperature wear properties of Inconel 718 coating. The mixed powders of Inconel 718 with different contents of MoSi2 (0, 10 and 30 wt%) were utilized as the cladding
materials. The microstructure and mechanical properties of the composite coatings were evaluated. The friction and wear properties of the composite coatings were examined from 30 ◦C to 800 ◦C in air sliding against Si3N4 counterpart. Results showed that the Inconel 718 coatings with different contents of MoSi2 were composed of the same matrix phase of γ-Ni(Cr, Fe) and Nb-rich Laves phase for 0 wt% MoSi2, Ni3Si/MoNiSi and Fe2Mo for 10 wt% MoSi2 as well as MoNiSi and MoFeSi for 30 wt% MoSi2, respectively. The topological close-packed effect of MoNiSi and MoFeSi as well as solution strengthening effect of γ-Ni(Cr, Fe) lead to the remarkable increase in the microhardness and mechanical properties of the Inconel 718 composite coating with 30 wt% MoSi2. The Inconel 718 coatings presented excellent wear resistance in the wide range of temperature with the increase of the content of MoSi2, which can be attributed to the Laves phases of MoFeSi and MoNiSi have excellent abrasive and adhesive wear resistance at medium-low temperature and the formation of smooth glazed layer containing MoO3 and MoO2 at high temperature.

KeywordInconel 718 composite coating MoSi2 GH4169 Laser cladding Wear resistance
DOI10.1016/j.surfcoat.2021.127665
Indexed BySCI
If4.158
Language英语
compositor第一作者单位
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/27771
Collection中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心
Corresponding AuthorLiang, Jun
Affiliation1.Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lu, Shisheng,Zhou, Jiansong,Wang, Lingqian,et al. Influence of MoSi2 on the microstructure and elevated-temperature wear properties of Inconel 718 coating fabricated by laser cladding[J]. Surface & Coatings Technology,2021(424):1-12.
APA Lu, Shisheng,Zhou, Jiansong,Wang, Lingqian,&Liang, Jun.(2021).Influence of MoSi2 on the microstructure and elevated-temperature wear properties of Inconel 718 coating fabricated by laser cladding.Surface & Coatings Technology(424),1-12.
MLA Lu, Shisheng,et al."Influence of MoSi2 on the microstructure and elevated-temperature wear properties of Inconel 718 coating fabricated by laser cladding".Surface & Coatings Technology .424(2021):1-12.
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