Mass Loss and Ion Elution of Biomedical Co&amp;ndash;Cr&amp;ndash;Mo Alloys during Pin-on-Disk Wear Tests

Ueda, Kyosuke; Nakaie, Kaori; Namba, Susumu; Yoneda, Takashi; Ishimizu, Keita; Narushima, Takayuki

doi:10.2320/matertrans.me201316

Cited by 7 publications

(4 citation statements)

References 33 publications

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“…Therefore, it was suggested that Co was preferentially released, and the incorporated (or remaining) Ti, Cr, and Mo appeared to be combined to form an interfacial layer such as chlorides, phosphates, and mixtures of oxides owing to their ionization tendencies. [23][24][25] Similar phenomena were observed in a previous retrieval study, which reported the presence of chlorides, phosphates, and mixtures of oxides of Ti, Cr, and Mo in the corrosion debris. 26 In this study, the Co concentration in the lubricant increased with testing duration.…”

Section: Discussionsupporting

confidence: 85%

“…In this study, we observed Co concentrations 30 times higher than the Cr concentrations, and the formation of a thick Ti–Cr–Mo oxide plate‐like layer on the Ti–6Al–4V alloy trunnion. Therefore, it was suggested that Co was preferentially released, and the incorporated (or remaining) Ti, Cr, and Mo appeared to be combined to form an interfacial layer such as chlorides, phosphates, and mixtures of oxides owing to their ionization tendencies . Similar phenomena were observed in a previous retrieval study, which reported the presence of chlorides, phosphates, and mixtures of oxides of Ti, Cr, and Mo in the corrosion debris .…”

Section: Discussionsupporting

confidence: 71%

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Reducing fretting‐initiated crevice corrosion in hip simulator tests using a zirconia‐toughened alumina femoral head

et al. 2017

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Taper fretting corrosion is considered a potentially limiting factor for total hip arthroplasty longevity. Recently, attention has been focused on new materials for ceramic femoral heads, for example, zirconia-toughened alumina (ZTA), since they have an alternative bearing surface that can improve the wear resistance. Moreover, ceramics have high chemical stability and corrosion resistance. In this study, we evaluated the effects of ZTA and Co-Cr-Mo alloy femoral heads on their taper fretting and/or corrosion characteristics under a controlled hip simulator test. After the test, less fretting and corrosion were observed in the taper surface of the trunnion against the ZTA femoral head than for that against the Co-Cr-Mo alloy femoral head. In addition, corrosion damages were only observed in the lateral-distal taper surface (noncontact area) of the trunnion in the Co-Cr-Mo alloy femoral head group. The ZTA femoral head group also eliminated the potential for Co ion release into the lubricants from taper corrosion, reducing the possibility of adverse local tissue inflammatory responses. In conclusion, ZTA femoral heads showed markedly less fretting corrosion compared to Co-Cr-Mo alloy femoral heads and have a lower potential for metal ion release. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2815-2826, 2018.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionsupporting

confidence: 71%

Reducing fretting‐initiated crevice corrosion in hip simulator tests using a zirconia‐toughened alumina femoral head

et al. 2017

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“…The following is the result of the sem test for a 600°C nitriding speciment that has previously been tested for wear resistance using lactic acid solution. In the picture there is a cut line scratch, caused by three body abrasions [16]. Fig 6 . can explain various forms of scratches, such as the occurrence of abrasion, abrasion grooves, delamination, and finally cohesive failure of all forms of scratches that can occur on the N600 specimen based on the nitriding process journal which has similar results in this study [17].…”

Section: Fig 6 Sem Micrographs Of Wear Surfacesmentioning

confidence: 99%

Manufacture of Wear-Resistant Alloy Co-Cr-Mo for Medical Implant Applications by Nitriding Coating Method

Setiawan

Laksono

Sukma

et al. 2022

MSF

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Nitrogen doped as-cast Co-Cr-Mo alloy with markedly enhanced hardness and wear resistance was successfully produced by pack nitriding process. Nitriding proses used the in-pack process using urea fertilizer as a nitrogen source. It was carried out with variations in temperature of 400°C, 500°C, 600°C and followed by annealing. The wear resistance of the specimen is tested using pin-on-disk. The total sample will be soaked in the lactic acid solution for 3 days. The results obtained from the After nitriding process, the hardness of of speciment N400 obtained a hardness value of 261.54 HV speciment N500 of 309.68 HV, and speciment N600 of 429.14 HV, the results of the hardness value increased in each speciment. The wear resistance value obtained for each speciment N400, N500, N600 is 2,81 x 10-6 mm3/Nm, 7,50 x 10-7 mm3/Nm, 1,87 x 10-7 mm3/Nm. The nitriding process forms a layer on the surface of the as-cast Co-Cr-Mo, it’s called Layer of Cr-N which is the result of heating/decomposing urea fertilizer into nitrogen gas which can coat the surface so that Cr-N bonds are formed in the layer. The thickness of the Cr-N layer on the N400 specimen is 0.28 mm, N500 is 0.35 mm, N600 is 0.38 mm. In addition, the surface results that have been tested for wear resistance form quite fine scratches but the formation of abrasions, such as abrasion, abrasion groove, delamination, and cohesive failure

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“…After the passivation films were removed, the highly reactive fresh surfaces were exposed. 59) Then, the tribochemical reactions of bare metal with oxygen, ethanol and acetic acid took place on the fresh surface.…”

Section: The Effect Of Acetic Acid On Wear Behaviormentioning

confidence: 99%

Effect of Acetic Acid on Wear Properties of Ferrous and Titanium-Based Materials under Ethanol Lubrication

Hibi

Mano

2020

Mater. Trans.

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Disks of ferrous and titanium-based material were immersed and unidirectionally slid against a stainless steel pin in ethanol with or without acetic acid to evaluate the effect of acetic acid on wear. The disks were made of cast iron, stainless steel, titanium metal and particulate-reinforced titanium metal matrix composite sintered from mixed powder of Si 3 N 4 (5 mass%), TiN (10 mass%) and Ti (85 mass%). In the absence of sliding, the stainless steel, titanium and composite showed good corrosion resistance but the cast iron exhibited galvanic corrosion. With sliding, the addition of acetic acid to the ethanol increased the wear of the ferrous materials but had little effect on the titanium-based materials. Morphological and chemical analyses of the worn surfaces revealed that acetic acid promoted anodic dissolution of iron on the sliding surfaces of the ferrous materials in ethanol. The results also indicated that titanium and the composite in ethanol with and without acetic acid primary underwent mechanical wear and chemical wear, respectively. The composite exhibited good corrosion and wear resistance in ethanol regardless of the presence of acetic acid.

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Mass Loss and Ion Elution of Biomedical Co–Cr–Mo Alloys during Pin-on-Disk Wear Tests

Cited by 7 publications

References 33 publications

Reducing fretting‐initiated crevice corrosion in hip simulator tests using a zirconia‐toughened alumina femoral head

Reducing fretting‐initiated crevice corrosion in hip simulator tests using a zirconia‐toughened alumina femoral head

Manufacture of Wear-Resistant Alloy Co-Cr-Mo for Medical Implant Applications by Nitriding Coating Method

Effect of Acetic Acid on Wear Properties of Ferrous and Titanium-Based Materials under Ethanol Lubrication

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