Simultaneously achieving superior mechanical and tribological properties in WC/a-C nanomultilayers via structural design and interfacial optimization | |
Department | 固体润滑国家重点实验室 |
He DQ(何东青)1,3; Pu JB(蒲吉斌)2; Lu ZB(鲁志斌)1; Wang LP(王立平)2; Zhang GA(张广安)1; Xue QJ(薛群基)1; Wang LP(王立平); Zhang GA(张广安) | |
2017 | |
Source Publication | Journal of Alloys and Compounds |
ISSN | 0925-8388 |
Volume | 698Pages:420-432 |
Abstract | Nanomultilayered WC/a-C coatings with modulation period raning from 1.3 to 11.5 nm were successfully fabricated using unbalanced magnetron sputtering process and the evolution of their microstructure, mechanical and tribological properties with the modulation period were systemically investigated. It has been demonstrated that the columnar structure in WC/a-C nanomultilayers originates from the surface irregularities of intermediate Cr/WC/C layer and the column diameter is correlated with the initial Cr layer thickness in this intermediate stage. Hardening and toughening through the nanomultilayer structure design have been achieved and particularly pronounced when the modulation period ranges from 5.8 to 10 nm. The enhanced hardness and fracture toughness are mainly attributed to dislocation/crack pinning effect from the thin individual layer and the heterointerfaces between WC and a-C layers. It is also found that the more heterointerfaces, the lower internal stress. What's more, the WC/a-C nanomultilayers with small modulation period (≤5.8 nm) exhibit low COF about 0.05 and good wear resistance due to the interfacial sliding between a WO3-rich tribofilm and a carbon-rich wear surface; once the modulation period above 5.8 nm, it fails to build up such a low friction interface between the tribopairs, which combining with the high intrinsic friction caused by its own structure characteristics result in high COF about 0.18–0.2 and poor wear resistance. |
Keyword | Wc/a-c Nanomultilayers Microstructure Hardness Fracture Toughness Tribology |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.jallcom.2016.12.173 |
Funding Organization | the National Natural Science Foundation of China (Grant no. 21373249;51322508) |
Indexed By | SCI |
If | 3.133 |
Language | 英语 |
Funding Project | 低维材料摩擦学组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21351 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Wang LP(王立平); Zhang GA(张广安) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.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 3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
Recommended Citation GB/T 7714 | He DQ,Pu JB,Lu ZB,et al. Simultaneously achieving superior mechanical and tribological properties in WC/a-C nanomultilayers via structural design and interfacial optimization[J]. Journal of Alloys and Compounds,2017,698:420-432. |
APA | He DQ.,Pu JB.,Lu ZB.,Wang LP.,Zhang GA.,...&张广安.(2017).Simultaneously achieving superior mechanical and tribological properties in WC/a-C nanomultilayers via structural design and interfacial optimization.Journal of Alloys and Compounds,698,420-432. |
MLA | He DQ,et al."Simultaneously achieving superior mechanical and tribological properties in WC/a-C nanomultilayers via structural design and interfacial optimization".Journal of Alloys and Compounds 698(2017):420-432. |
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