Tribochemical Mechanism of Alumina With Water

Gates, Richard S.; Hsu, Mao Hsiang; Klaus, E. E.

doi:10.1080/10402008908981900

Cited by 202 publications

(48 citation statements)

References 2 publications

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“…Equation (6) indicates that aluminum hydroxide is tribochemically formed during wear; and actually, this has been verified for Al 2 O 3 ceramics [139]. For yttria, a similar reaction is possible; but in accordance with Fisher et al, yttria likely forms insoluble fractured roll debris in the wear track [140].…”

Section: Swm Ceramic-on-ceramic Hip Simulator Studymentioning

confidence: 57%

Silicon Nitride Bearings for Total Joint Arthroplasty

et al. 2016

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Abstract:The articulation performance of silicon nitride against conventional and highly cross-linked polyethylene, as well as for self-mated silicon nitride bearings, was examined in a series of standard hip simulation studies. Wear rates for polyethylene liners against silicon nitride femoral heads were consistent with reported literature, although higher than cobalt chromium controls. Excessive protein precipitation was a confounding factor in interpretation of the wear data. Post wear-test Raman spectroscopy of the cross-linked polyethylene liners showed no oxidative degradation. Wear of self-mated silicon nitride was found to be essentially zero and indistinguishable from alumina controls using continuously orbital hip simulation for up to three million cycles. However, introduction of an alternative loading profile from three to five million cycles, including a stop-dwell-start sequence, significantly increased wear for two of six silicon nitride couples. This behavior is associated with formation and disruption of a gelatinous silicic acid tribochemical film, and is consistent with a recurrent transition from fluid-film to boundary lubrication. Overall, these results suggest that silicon nitride articulation against dissimilar counterface surfaces (e.g., highly cross-linked polyethylene) is preferred.

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Section: Swm Ceramic-on-ceramic Hip Simulator Studymentioning

confidence: 57%

Silicon Nitride Bearings for Total Joint Arthroplasty

et al. 2016

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“…The transformation of the compound which consists of Fe and Ca oxides is observed. The adhesion force of Al to Fe which may be enhanced by a tribo chemical reaction with the existence of water is suspected to yield abrasive materials 4) .…”

Section: Endurance Life Tests In the Water Pumpsmentioning

confidence: 99%

Evaluations of Ceramic Bearings Used in Electric Water Pumps

Hirao¹,

Shibuya²,

Sekine³

et al. 2011

Tribology Online

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“…Wear administered solely by the processes of deformation and fracturing are basically described by mechanical wear. For brittle materials, the deformation procedure plays a major role in its wear mechanism [12][13][14]. The tribochemical wear describes the wear governed by chemical and thermal.…”

Section: Typical Compositions and Designations Of Brake Frictionmentioning

confidence: 99%

Application of Powder Metallurgy Methods for Production of a Novel Cu‐Based Composite Frictional Train Brake Material

Gyimah¹,

Guo²,

Huang³

et al. 2017

Powder Metallurgy - Fundamentals and Case Studies

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A novel Cu-based composite frictional train brake material composed of several elements such as Al, SiO 2 , Fe, graphite, Sn, Mn and SiO 2 re-enforced with other elements was treated under Powder Metallurgy (P/M) route. The materials were sintered at three different temperatures (850 C, 900 C and 950 C) at a constant pressure.The tribological behavior of these materials was analyzed by pad-on-disk tests without lubrication and the coefficient of friction, wear rate and wear number were studied in order to identify the effects of the sintering temperature on the base materials composition. The pores in the sintered material were mainly solid lubricants such as graphite and other low melting elements. This resulted in poor hardness and mechanical properties, which were compensated by its ability to reduce seizure.The wear mechanisms that were generated are as follows; delamination, plowing and abrasive wear. The abrasive wear were dominant and found on samples sintered at 850 C and 900 C, it is seen to be responsible for high wear rates. The friction coefficient under high pressure (3.13MPa) dry conditions had average values of 0. 404, 0.343, and 0.336, at 950 C, 900 C and 850 C respectively. The investigation of worn surface was assessed by using x-ray defractory and scanned electron microscope.

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Tribochemical Mechanism of Alumina With Water

Cited by 202 publications

References 2 publications

Silicon Nitride Bearings for Total Joint Arthroplasty

Silicon Nitride Bearings for Total Joint Arthroplasty

Evaluations of Ceramic Bearings Used in Electric Water Pumps

Application of Powder Metallurgy Methods for Production of a Novel Cu‐Based Composite Frictional Train Brake Material

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