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Multi-Length Scale Tribology of Electrophoretically Deposited Nickel-Diamond Coatings
Material Science and Engineering, Indian Institute of Technology, Kanpur, Kanpur, India .
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0001-5676-7903
Babu Banarasi Das University, Department of Chemistry, Lucknow, India.
Material Science and Engineering, Indian Institute of Technology, Kanpur, Kanpur, India .
2017 (English)In: JOM: The Member Journal of TMS, ISSN 1047-4838, E-ISSN 1543-1851, Vol. 69, no 2, 227-235 p.Article in journal (Refereed) Published
Abstract [en]

Electrophoretically deposited (EPD) nickel and its composite coatings are widely used to enhance the life span of continuous ingot casting molds in the steel, aerospace and automotive industries. This article reports the effect of different concentrations of diamond particles (2.5–10 g/L) on the wear mechanism of EPD Ni. The distribution of diamond particles in the Ni matrix was observed using Voronoi tessellation. Variation in COF was observed by a fretting wear test to be 0.51 ± 0.07 for Ni, which decreases to 0.35 ± 0.03 for the Ni-diamond coatings. The wear volume of the coatings with 7.5 g/L concentration of diamond was observed to be a minimum (0.051 ± 0.02 × 10−3 mm3) compared with other composite coatings. Further, the micro-scratch testing of the coatings also exhibited a reduced COF (0.03–0.12) for 7.5 g/L diamond concentration compared with Ni (0.08–0.13). Higher wear resistance of the diamond-added coatings (optimum 7.5 g/L concentration) is due to the balance between the dispersion strengthening mechanism and the enhancement of the load-bearing capacity due to the incorporation of diamond particles. Thus, these composites can be used for applications in automotive and aerospace industries. © 2016 The Minerals, Metals & Materials Society

Place, publisher, year, edition, pages
2017. Vol. 69, no 2, 227-235 p.
Keyword [en]
Aerospace industry; Automotive industry; Diamonds; Nickel; Nickel coatings; Wear resistance, Aerospace and automotive industries; Diamond coating; Diamond concentration; Diamond particles; Dispersion strengthening; Fretting wear test; Load-bearing capacity; Voronoi tessellations, Composite coatings
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology; ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-10360DOI: 10.1007/s11837-016-2142-4ISI: 000393106400013ScopusID: 2-s2.0-84991101916OAI: oai:DiVA.org:hv-10360DiVA: diva2:1058232
Note

First Online: 12 October 2016

Available from: 2016-12-20 Created: 2016-12-20 Last updated: 2017-04-20Bibliographically approved

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