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The sliding wear of polymers against steel
Bibliography: pages 89-93.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Centre for Materials Engineering
2016
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| _version_ | 1867613155059826688 |
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| access_status_str | Open Access |
| author | Clarke, C G |
| author2 | Allen, Colin |
| author_browse | Allen, Colin Clarke, C G |
| author_facet | Allen, Colin Clarke, C G |
| author_sort | Clarke, C G |
| collection | Thesis |
| description | Bibliography: pages 89-93. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/22007 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:38.662Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Centre for Materials Engineering |
| publisherStr | Centre for Materials Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/22007 The sliding wear of polymers against steel Clarke, C G Allen, Colin Polymers - Testing Mechanical wear Materials Engineering Bibliography: pages 89-93. A laboratory wear testing facility has been developed to generate wear rate data for polymeric materials sliding at constant velocity against a hardened stainless steel base. The polymers investigated were ultra high molecular weight polyethylene (UHMWPE), ultra high molecular weight polyethylene-with a friction reducing additive (UHMWPE/FILL), polyoxymethylene (POM), poly(ethylene terephthalate) (PETP), molybdenum disulphide filled polyamide 6 (PA6/MoS₂) and graphite filled poly(amide-imide) (P(A-I)/GR). Testing was carried out as a function of sliding velocity between 0.13 to 2.27 ms⁻¹, loads of 1, 3 and 5 MP a and counterface roughnesses which varied from 1 micrometre to 0.25 micrometres. An increase in the counterface roughness resulted in a variable increase in the wear rate of the individual polymers except for the filled UHMWPE. These changes in the wear rate have been explained in terms of the mechanism of material removal. A progressive increase in sliding velocity has been shown to result in an initial increase in the wear rate followed by a decrease and finally a rapid increase for all materials under the majority of applied conditions. Explanations for such behaviour have been advanced in terms of the viscoelastic response of the polymers to strain rate and temperature. Low modulus materials however showed a significant drop in wear rate under low loads above a critical velocity which is believed to be due to a transition from boundary to partial el astohydrodynamic lubrication. Generally an increase in load gave an increase in wear rate for all polymers except for UHMWPE and filled UHMWPE at a counterface roughness of 1 micrometre. These conditions have been discussed with reference to the materials response to thermal effects and counterface interactions. 2016-09-29T17:11:45Z 2016-09-29T17:11:45Z 1988 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/22007 eng application/pdf Centre for Materials Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Polymers - Testing Mechanical wear Materials Engineering Clarke, C G The sliding wear of polymers against steel |
| thesis_degree_str | Master's |
| title | The sliding wear of polymers against steel |
| title_full | The sliding wear of polymers against steel |
| title_fullStr | The sliding wear of polymers against steel |
| title_full_unstemmed | The sliding wear of polymers against steel |
| title_short | The sliding wear of polymers against steel |
| title_sort | sliding wear of polymers against steel |
| topic | Polymers - Testing Mechanical wear Materials Engineering |
| url | http://hdl.handle.net/11427/22007 |
| work_keys_str_mv | AT clarkecg theslidingwearofpolymersagainststeel AT clarkecg slidingwearofpolymersagainststeel |