| Effects of WC phase contents on the microstructure, mechanical properties and tribological behaviors of WC/a-C superlattice coatings | |
| Department | 固体润滑国家重点实验室 |
Pu JB(蒲吉斌)1 ; He DQ(何东青)2,3; Wang LP(王立平)1; Wang LP(王立平)
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| 2015 | |
| Source Publication | Applied Surface Science
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| ISSN | 0169-4332 |
| Volume | 357Pages:2039-2047 |
| Abstract | Nanocomposite WC/a-C coatings with variable contents of tungsten carbide (WC1−x) and amorphous carbon (a-C) were successfully fabricated using a magnetron sputtering process. The microstructure, mechanical properties and tribological behaviors of the as-fabricated coatings were investigated and compared. The results showed that the “superlattice coating” feature of an alternating multilayer structure with a-C and WC1−x nanocrystallites layers on the nanoscale was formed. These multilayer superlattice structures led to diminished residual stress and improved the strength of the adhesion to the substrate. The WC/a-C coating with W 5.43 at.% exhibited low friction coefficients of 0.05 at 25 °C and 0.28 at 200 °C. This significant improvement in the tribological performances of the WC/a-C coating was mainly attributed to the superior “superlattice” microstructure and the formation of a continuously compacted tribofilms, which was rich in graphitized carbon at 25 °C and dominated by the friction triggered WO3 at 200 °C. Moreover, the WC/a-C coating with W 5.43 at.% achieved optimal anti-wear properties at 25 °C due to the synergistic combination of the enhancement effects of the WC1−x nanoparticles and the partition effect from the transfer film that restricted direct contact of the steel ball with the coating and thus prevented further intense wear. The accelerated wear of the WC/a-C coating with the increase of the WC phase content at 200 °C might be due to the combination of oxidation wear and abrasive wear that originated from the WC1−x phase. |
| Keyword | Nanocomposite Wc/a-c Superlattice Coatings Microstructure Tribological Properties |
| Subject Area | 材料科学与物理化学 |
| DOI | 10.1016/j.apsusc.2015.09.181 |
| Funding Organization | the Program of the Light of the Chinese Academy of Sciences in China's Western Region (2013);the National Nature Science Foundation of China (Grant 51322508;11172300) |
| Indexed By | SCI |
| If | 3.150 |
| Language | 英语 |
| Funding Project | 低维材料摩擦学组 |
| compositor | 第二作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/19193 |
| Collection | 固体润滑国家重点实验室（LSL） |
| Corresponding Author | Wang LP(王立平) |
| Affiliation | 1.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Marine Mat & Protect Technol Zhejiang Pro, Key Lab Marine Mat & Related Technol, Ningbo 315201, Zhejiang, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
| Recommended Citation GB/T 7714 | Pu JB,He DQ,Wang LP,et al. Effects of WC phase contents on the microstructure, mechanical properties and tribological behaviors of WC/a-C superlattice coatings[J]. Applied Surface Science,2015,357:2039-2047. |
| APA | Pu JB,He DQ,Wang LP,&王立平.(2015).Effects of WC phase contents on the microstructure, mechanical properties and tribological behaviors of WC/a-C superlattice coatings.Applied Surface Science,357,2039-2047. |
| MLA | Pu JB,et al."Effects of WC phase contents on the microstructure, mechanical properties and tribological behaviors of WC/a-C superlattice coatings".Applied Surface Science 357(2015):2039-2047. |
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| File Name/Size | DocType | Version | Access | License | ||
| 1-s2.0-S016943321502（5254KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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