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Allsopp, D.N.; Trezona, R.I.; Hutchings, IM

doi:10.1023/a:1019178716408

Cited by 109 publications

(28 citation statements)

References 3 publications

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“…Several researchers have developed modified test rigs to include an integrated electrochemical three-electrode setup, in order to investigate the corrosion aspect of wear, in addition to the mechanical wear during micro-abrasion in simulated physiological conditions [24][25][26]. Abrasion, or micro-scale abrasion wear can be broadly characterised as a two-body, or three-body process [27], depending on system parameters, such as the applied load, sliding distance, volume fraction of abrasive particles and material hardness and roughness [1,28]. In hip replacements the two bodies refer to the two bearing surfaces, the femoral head and acetabular cup, where a third body may be any material present between the contacting surfaces interface; which as mentioned includes bone or bone cement particles, and also wear debris generated from either of the contacting surfaces.…”

Section: Micro-scale Abrasionmentioning

confidence: 99%

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Mapping the Micro-Abrasion Mechanisms of CoCrMo: Some Thoughts on Varying Ceramic Counterface Diameter on Transition Boundaries In Vitro

et al. 2020

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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 the parameter range tested. A dominant two- to three-body abrasion regime was observed with an increasing load and ball diameter. The 28-mm ball diameter displayed the lowest wastage, with an 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 more accurate models for wear prediction during micro-abrasion conditions. Wear mapping for hip replacements could provide a useful aid for pre-clinical hip wear evaluations and long-term performance.

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Section: Micro-scale Abrasionmentioning

confidence: 99%

“…The surface roughness of the CoCrMo sample was measured using an MFP-3D Atomic Force Microscope (Asylum Research, Goleta, CA, USA). (25,28,32, and 35 mm) for the counter-face rotating ball, representing a range of femoral head diameters. The alumina balls were unused prior to testing (surface roughness: Ra = 0.050 ± 1.4 µm).…”

Section: Test Materialsmentioning

confidence: 99%

Mapping the Micro-Abrasion Mechanisms of CoCrMo: Some Thoughts on Varying Ceramic Counterface Diameter on Transition Boundaries In Vitro

et al. 2020

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“…The tests were driven at constant rotational speed of 75 rpm, corresponding to 0.1 m/s tangential speed. To minimize the risk of scattering the results [6], the ball surface was prepared by a run-in procedure prior to the starting of the study.…”

Section: Experimental Workmentioning

confidence: 99%

“…If the intrinsic behaviour of the coating is to be determined, a suitable method must be used to separate the effect of the substrate. The basis for analysing the results to obtain the coating behaviour have been derived by Kassman et al [1] and successively updated [2][3][4][5][6][7]. A recent paper by Kusano et al [8] reviews and discusses the measurement methods and the various procedures for analysing the test results.…”

Section: Introductionmentioning

confidence: 99%

Micro-scale abrasive wear of coated surfaces-prediction models

Ramalho

2005

Surface and Coatings Technology

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Micro-scale abrasive wear testing is widely used to characterise thinly coated surfaces. Beyond the several advantages of this technique, the possibility of finding the specific wear rates both for the substrate and for the coating with only one set of tests on coated specimens is certainly an important reason for the rapid spread of the micro-scale abrasive technique. It has not yet been established if the coating and the uncoated substrate can be characterized separately, with the results subsequently being used to calculate the wear characteristics of thincoated surfaces. This paper concerns the development of a model to predict the behaviour of coated surfaces, based on previous characterisation of the coating and of the substrate in non-perforating tests. By comparison with experimental results, the method developed is used to forecast the abrasion resistance of TiN and of thinly coated copper specimens.

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“…Also, conditions typically leading to 2B abrasion can cause an atypical flow of slurry around the contact area. This leads to non-spherical wear scars, characterised by a ridge of specimen material in the centre of the scar, parallel to the sliding direction [6]. The resultant wear rate is therefore unpredictable.…”

Section: Introductionmentioning

confidence: 99%