Phase transformation and tribological properties of Ag-MoO3 contained NiCrAlY based composite coatings fabricated by laser cladding
Department先进润滑与防护材料研究发展中心
Wang LQ(王凌倩)1; Zhou JS(周健松)1; Xin BB(辛本斌)1,2; Yu YJ(俞友军)1; Ren SF(任书芳)1; Li Z(李珍)1; Zhou JS(周健松)
The second department固体润滑国家重点实验室
2017
Source PublicationOptics and Laser Technology
ISSN0030-3992
Volume93Pages:79-86
Abstract

Ag-MoO3 contained NiCrAIY based composite coating was successfully prepared on GH4169 stainless steel substrate by high energy ball milling and laser cladding. The microstructure and phase transformation were investigated by scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS) and X-ray diffraction spectrum (XRD). The tribological behavior and mechanism from room temperature to 800 ℃ were investigated. Results showed that MoO3 in the composite powders transformed to Mo2C reinforcement under the high energy density of laser, and a series of opposite transformation occurred during friction process. The coating showed the lowest friction coefficient and low wear rate at 600 ℃ and 800 ℃ due to the generation of Ag2MoO4 during tribo-chemical reactions and the formation of lubrication glaze on the worn surface. Ag made effective lubrication when the temperature rose up to 200 ℃. The coating displayed a relatively high friction coefficient (about 0.51) at 400 ℃, because though MoO3 (oxidation products of Mo2C) and Ag2MoO4 were detected on the worn surface, they could not realize effective lubrication at this temperature. Abrasive wear, adhesive wear and plastic deformation contributed to the increased friction and wear.

KeywordLaser Cladding Silver Molybdate Self-lubrication Nicraiy-based Composite Coatings
Subject Area材料科学与物理化学
DOI10.1016/j.optlastec.2017.02.006
Funding Organizationthe National Natural Science Foundation of China (Grant nos. 51475444;51505464;51405475)
Indexed BySCI
If2.109
Language英语
Funding Project金属基高温润滑材料研究组
compositor第一作者单位
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/22174
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
固体润滑国家重点实验室(LSL)
Corresponding AuthorZhou JS(周健松)
Affiliation1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Wang LQ,Zhou JS,Xin BB,et al. Phase transformation and tribological properties of Ag-MoO3 contained NiCrAlY based composite coatings fabricated by laser cladding[J]. Optics and Laser Technology,2017,93:79-86.
APA Wang LQ.,Zhou JS.,Xin BB.,Yu YJ.,Ren SF.,...&周健松.(2017).Phase transformation and tribological properties of Ag-MoO3 contained NiCrAlY based composite coatings fabricated by laser cladding.Optics and Laser Technology,93,79-86.
MLA Wang LQ,et al."Phase transformation and tribological properties of Ag-MoO3 contained NiCrAlY based composite coatings fabricated by laser cladding".Optics and Laser Technology 93(2017):79-86.
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