Material removal during the sliding of hydroxyapatite against UHMWPE.
Hydroxyapatite has been rubbed against ultra-high-molecular-weight-polyethylene (UHMWPE) under calcium-containg aqueous solutions. Further, hardness tests were carried out in air and in calcium-containing solutions whose pH ranged from pH 5 to pH 9. Hardness was found to vary with pH with a peak at...
| Main Authors: | , |
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| Format: | Journal article |
| Jezik: | English |
| Izdano: |
2001
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| _version_ | 1826265149868081152 |
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| author | Mazeau, G Czernuszka, J |
| author_facet | Mazeau, G Czernuszka, J |
| author_sort | Mazeau, G |
| collection | OXFORD |
| description | Hydroxyapatite has been rubbed against ultra-high-molecular-weight-polyethylene (UHMWPE) under calcium-containg aqueous solutions. Further, hardness tests were carried out in air and in calcium-containing solutions whose pH ranged from pH 5 to pH 9. Hardness was found to vary with pH with a peak at around pH 7, i.e. - a chemomechanical effect was observed. Wear tests consisted in sliding hydroxyapatite samples against a UHMWPE disk for eight hours when lubricated by the same solutions as those used for the hardness tests. Volume loss, pH and calcium concentration were measured for up to 8 hours of sliding. Linking wear tests results with hardness results and supersaturation levels, it was concluded that two wear mechanisms occurred. A chemical mechanism depending on supersaturation occurred at the early stages of sliding. The wear rate was essentially independent of hardness during this stage. After a few hours, depending on the supersaturation of the lubricant, the chemical mechanism turned into a chemomechanical mechanism dependant on hardness. |
| first_indexed | 2024-03-06T20:19:08Z |
| format | Journal article |
| id | oxford-uuid:2d339f2f-291e-40ab-ae9c-f9d8d2b1825c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:19:08Z |
| publishDate | 2001 |
| record_format | dspace |
| spelling | oxford-uuid:2d339f2f-291e-40ab-ae9c-f9d8d2b1825c2022-03-26T12:41:20ZMaterial removal during the sliding of hydroxyapatite against UHMWPE.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2d339f2f-291e-40ab-ae9c-f9d8d2b1825cEnglishSymplectic Elements at Oxford2001Mazeau, GCzernuszka, JHydroxyapatite has been rubbed against ultra-high-molecular-weight-polyethylene (UHMWPE) under calcium-containg aqueous solutions. Further, hardness tests were carried out in air and in calcium-containing solutions whose pH ranged from pH 5 to pH 9. Hardness was found to vary with pH with a peak at around pH 7, i.e. - a chemomechanical effect was observed. Wear tests consisted in sliding hydroxyapatite samples against a UHMWPE disk for eight hours when lubricated by the same solutions as those used for the hardness tests. Volume loss, pH and calcium concentration were measured for up to 8 hours of sliding. Linking wear tests results with hardness results and supersaturation levels, it was concluded that two wear mechanisms occurred. A chemical mechanism depending on supersaturation occurred at the early stages of sliding. The wear rate was essentially independent of hardness during this stage. After a few hours, depending on the supersaturation of the lubricant, the chemical mechanism turned into a chemomechanical mechanism dependant on hardness. |
| spellingShingle | Mazeau, G Czernuszka, J Material removal during the sliding of hydroxyapatite against UHMWPE. |
| title | Material removal during the sliding of hydroxyapatite against UHMWPE. |
| title_full | Material removal during the sliding of hydroxyapatite against UHMWPE. |
| title_fullStr | Material removal during the sliding of hydroxyapatite against UHMWPE. |
| title_full_unstemmed | Material removal during the sliding of hydroxyapatite against UHMWPE. |
| title_short | Material removal during the sliding of hydroxyapatite against UHMWPE. |
| title_sort | material removal during the sliding of hydroxyapatite against uhmwpe |
| work_keys_str_mv | AT mazeaug materialremovalduringtheslidingofhydroxyapatiteagainstuhmwpe AT czernuszkaj materialremovalduringtheslidingofhydroxyapatiteagainstuhmwpe |