| Characterization of magnetron sputtered Cr-B and Cr-B-C thin films for electrical contact applications | |
| Department | 固体润滑国家重点实验室 |
Nedfors Nils1; Primetzhofer, Daniel2; Wang LP(王立平)3 ; Lu, Jun4; Hultman, Lars4; Jansson, Ulf1; Nedfors, Nils
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| 2015 | |
| Source Publication | Surface and Coatings Technology
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| ISSN | 0257-8972 |
| Volume | 266Pages:167-176 |
| Abstract | We have deposited Cr–B and Cr–B–C thin films by co-sputtering from chromium boride and carbon targets. The binary Cr–B films consist of nanocrystalline and substoichiometric CrB2 − x grains (B/Cr atomic ratio ≤ 1.5) with a (101)-texture, where B segregates to the grain boundaries forming a B-rich tissue phase. A hardness of 25 GPa is measured for these films. They have a low wear resistance, attributed to a (101)-texture and limited adhesion. As a consequence, wear debris in the CrB2 − x wear track from delaminated film and steel-to-steel contact between the exposed substrate and the counter surface result in a high friction (0.52–0.78 against stainless steel) making the Cr–B films unsuitable as sliding electric contacts. Cr–B–C films, on the other hand, form a two phase amorphous structure at > 17 at.% C consisting of an amorphous Cr-rich phase containing both B and C and an amorphous matrix phase containing mainly B and C. The addition of C improves the adhesion and tribological properties and a coefficient of friction of 0.12 is obtained at 38 at.% C. The improved tribological properties are explained by the formation of the matrix phase, which acts as a solid lubricant forming a graphite-like tribofilm during ball-on-disc test. However, the formation of an amorphous structure is not beneficial for the electrical contact resistance, which increases from 0.5 Ω for the Cr–B film to 1.5 and 2.3 Ω for the Cr–B–C films containing 17 and 26 at.% C, respectively. Finally, the importance of a chemical analysis of the chromium boride sputtering target composition is discussed. |
| Keyword | Magnetron Sputtering Chromium Diboride Mechanical Properties Tribological Properties |
| Subject Area | 材料科学与物理化学 |
| DOI | 10.1016/j.surfcoat.2015.02.037 |
| Funding Organization | Vinnova (Swedish Governmental Agency for Innovation Systems) through the VINN Excellence Centre FunMat. J. L. and U. J. also acknowledge the Swedish Foundation of Strategic Research through the Synergy Grant FUNCASE. U. J. acknowledges the Swedish Research Council (VR) |
| Indexed By | SCI |
| If | 2.139 |
| Language | 英语 |
| Funding Project | 低维材料摩擦学组 |
| compositor | 第三作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/18409 |
| Collection | 固体润滑国家重点实验室（LSL） |
| Corresponding Author | Nedfors, Nils |
| Affiliation | 1.Uppsala Univ, Dept Chem, Angstrom Lab, SE-75121 Uppsala, Sweden 2.Uppsala Univ, Dept Phys & Astron, Ion Phys, SE-75120 Uppsala, Sweden 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 4.Linkoping Univ, Thin Film Phys Div, Dept Phys IFM, SE-58183 Linkoping, Sweden |
| Recommended Citation GB/T 7714 | Nedfors Nils,Primetzhofer, Daniel,Wang LP,et al. Characterization of magnetron sputtered Cr-B and Cr-B-C thin films for electrical contact applications[J]. Surface and Coatings Technology,2015,266:167-176. |
| APA | Nedfors Nils.,Primetzhofer, Daniel.,Wang LP.,Lu, Jun.,Hultman, Lars.,...&Nedfors, Nils.(2015).Characterization of magnetron sputtered Cr-B and Cr-B-C thin films for electrical contact applications.Surface and Coatings Technology,266,167-176. |
| MLA | Nedfors Nils,et al."Characterization of magnetron sputtered Cr-B and Cr-B-C thin films for electrical contact applications".Surface and Coatings Technology 266(2015):167-176. |
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| 29-Nils-1-surface an（2091KB） | 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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