Magnus, C., Mostaed, A. orcid.org/0000-0002-2443-7819 and Rainforth, W.M. orcid.org/0000-0003-3898-0318 (2020) Wear induced ripplocation during dry sliding wear of TiC-based composite. Wear, 444-445. 203121. ISSN 0043-1648
Abstract
Monolithic TiC and TiC particulate ceramic composite containing 30 and 50 mol.%SiC were consolidated and synthesized using spark plasma sintering (SPS) without sintering aids. The as-sintered bulk samples microstructural evolution and dry sliding room-temperature tribological properties against Al2O3 ball were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman analysis. The role of coefficient of thermal expansion (CTE) mismatch between TiC and SiC as well as cubic to hexagonal SiC phase transformation on the evolution of residual stresses in the composite was also investigated. The friction and wear properties of the monolithic TiC were superior to that of the composite with frictional heating-induced tribo-oxidation playing a dominant role in the wear mechanism. The increase in friction and wear of the composite is attributed to wear-induced stress-relaxation of the previously trapped residual stresses in the composite leading to extensive ripplocation of the TiC grains and consequent SiC grain pull-outs. Herein, we report for the first time on the wear-induced mechanical exfoliation of carbon, its subsequent decomposition into graphite and eventual deformation by micromechanism involving nucleation and propagation of ripples.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Elsevier. This is an author produced version of a paper subsequently published in Wear. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Spark plasma sintering; High temperature ceramics; Dry sliding friction; Frictional heating; Residual stresses; Thermal expansion; Ripplocations; Exfoliation |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 26 May 2020 12:59 |
Last Modified: | 13 Nov 2020 01:39 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.wear.2019.203121 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:161181 |