Mapping the micro-abrasion mechanisms of CoCrMo : some thoughts on varying ceramic counterface diameter on transition boundaries invitro

Sadiq, Kamran and Sim, Mark A. and Black, Richard A. and Stack, Margaret M. (2020) Mapping the micro-abrasion mechanisms of CoCrMo : some thoughts on varying ceramic counterface diameter on transition boundaries invitro. Lubricants, 8 (7). 71. ISSN 2075-4442

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    Abstract

    The micro-abrasion wear mechanisms for CoCrMo against variable size alumina balls, representing typical artificial femoral head sizes, were investigated over a range of applied loads in foetal calf serum solution. SEM analysis of resulting wear scars displayed two-body and mixed-mode abrasion modes of wear. The wear factor, κ was found to range between 0.86 and 22.87 (10-6 mm3/ Nm). Micro-abrasion mechanism and wastage maps were constructed for parameter range tested. A dominant 3-2 body abrasion regime was observed with increasing load and ball diameter. A 28 mm ball diameter displayed the lowest wastage with increasing load. Proteins may act to reduce the severity of contact between abrasive particles and bearing surfaces. Wear volumes did not necessarily increase linearly with applied load and ball diameter, therefore, there is a need to develop further accurate models for wear prediction during micro-abrasion conditions. Wear mapping for hip replacement could provide a useful aid in pre-clinical hip wear evaluations and long-term performance.

    Creators(s): Sadiq, Kamran ORCID logoORCID: https://orcid.org/0000-0001-8813-8618, Sim, Mark A., Black, Richard A. and Stack, Margaret M. ORCID logoORCID: https://orcid.org/0000-0001-6535-6014;
    Item type:Article
    ID code:72843
    Keywords:micro abraison, ceramic on metal, artificial hip, CoCrMo, wear maps, Bioengineering, Biomedical Engineering
    Subjects:Technology > Engineering (General). Civil engineering (General) > Bioengineering
    Department:Faculty of Engineering > Biomedical Engineering
    Faculty of Engineering > Mechanical and Aerospace Engineering
    Depositing user: Pure Administrator
    Date deposited:24 Jun 2020 09:49
    Last modified:02 Aug 2020 01:47
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/72843
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