Tribological and corrosion performance of the plasma-sprayed conformal ceramic coating on selective laser melted CoCrMo alloy

Li, H.Q.; Guo, Hong; Shen, Fei; Lou, Dianjun; Xia, Weilong; Fang, Xiaojun

doi:10.1016/j.jmbbm.2021.104520

Cited by 8 publications

(3 citation statements)

References 25 publications

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“…The passive region transfers to a transpassive region at about +0.3 V Ag/AgCl related to the dissolution of oxide and water oxidation. 69 These results are similar to other studies in similar electrolytes. 26,70 EIS measurements after 1 h of immersion revealed, in agreement with the CPP measurements, that the corrosion resistance difference among the specimens was small.…”

Section: Resultssupporting

confidence: 92%

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Influence of Proteins and Building Direction on the Corrosion and Tribocorrosion of CoCrMo Fabricated by Laser Powder Bed Fusion

Atapour,

Standish,

Henderson

et al. 2024

ACS Biomater. Sci. Eng.

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Cobalt–chromium–molybdenum (CoCrMo) alloys are common wear-exposed biomedical alloys and are manufactured in multiple ways, increasingly using additive manufacturing processes such as laser powder bed fusion (LPBF). Here, we investigate the effect of proteins and the manufacturing process (wrought vs LPBF) and building orientation (LPBF-XY and XZ) on the corrosion, metal release, tribocorrosion, and surface oxide composition by means of electrochemical, mechanical, microscopic, diffractive, and spectroscopic methods. The study was conducted at pH 7.3 in 5 g/L NaCl and 5 mM 2-(N-morpholino) ethanesulfonic acid (MES) buffer, which was found to be necessary to avoid metal phosphate and metal–protein aggregate precipitation. The effect of 10 g/L bovine serum albumin (BSA) and 2.5 g/L fibrinogen (Fbn) was studied. BSA and Fbn strongly enhanced the release of Co, Cr, and Mo and slightly enhanced the corrosion (still in the passive domain) for all CoCrMo alloys and most for LPBF-XZ, followed by LPBF-XY and the wrought CoCrMo. BSA and Fbn, most pronounced when combined, significantly decreased the coefficient of friction due to lubrication, the wear track width and severity of the wear mechanism, and the tribocorrosion for all alloys, with no clear effect of the manufacturing type. The wear track area was significantly more oxidized than the area outside of the wear track. In the reference solution without proteins, a strong Mo oxidation in the wear track surface oxide was indicative of a pH decrease and cell separation of the anodic and cathodic areas. This effect was absent in the presence of the proteins.

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Section: Resultssupporting

confidence: 92%

“…Also, there was no considerable difference between the sample surface before and after the CPP as imaged by OM (data not shown). The passive region transfers to a transpassive region at about +0.3 V Ag/AgCl related to the dissolution of oxide and water oxidation . These results are similar to other studies in similar electrolytes. , …”

Section: Resultssupporting

confidence: 90%

Influence of Proteins and Building Direction on the Corrosion and Tribocorrosion of CoCrMo Fabricated by Laser Powder Bed Fusion

Atapour,

Standish,

Henderson

et al. 2024

ACS Biomater. Sci. Eng.

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“…Moreover, uniform CNT distribution and good adhesion of coatings with the substrate are the major factors that improve the wear performance of the coated surface. Li et al [19] prepared the ceramic coating of Al 2 O 3 -ZrO 2 composite which is fabricated by atmosphere plasma spray on the CoCrMo alloy substrate by selective laser melting (SLM). They found that the Al 2 O 3 -ZrO 2 composite coating has better corrosion and wear resistance compared with the ceramic coating (Al 2 O 3 , ZrO 2 ) and the CoCrMo substrate.…”

Section: Introductionmentioning

confidence: 99%

Influence of pore-forming agent on wear resistance of composite coating

Liu

Bian

Wang

et al. 2022

Surface Engineering

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In this paper, polystyrene microsphere (PS) is selected as the pore-forming agent to prepare porous phosphate bonded ceramic coating. Then the mixed solution of polytetrafluoroethylene and polyamide-imide (PTFE-PAI) is pressed into the porous coating to prepare the composite coating. Besides, the microstructure and tribological properties of composite coatings were studied. The results show that the hydrophobicity of composite coating is improved because PTFE-PAI is pressed into the coating. Moreover, the coefficient of friction decreases with the increase of PS content due to the self-lubricating ability of polytetrafluoroethylene. Besides, the wear rate also decreases with the increase of PS content, because polytetrafluoroethylene forms a transfer film on the grinding ball, and the original ceramic coating framework can withstand shearing force due to its high hardness, which protects the composite coating and reduces the wear rate. With this self-lubricating capability, the composite coating with 6 wt-% PS showed the smallest wear rate.

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The Effect of Si Addition on the Microstructure, Mechanical Properties, and Wear Rate of the Co–Cr–Mo-Based Biomedical Alloys

Basha

Moustafa

Ibrahim

et al. 2023

Silicon

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Tribological and corrosion performance of the plasma-sprayed conformal ceramic coating on selective laser melted CoCrMo alloy

Cited by 8 publications

References 25 publications

Influence of Proteins and Building Direction on the Corrosion and Tribocorrosion of CoCrMo Fabricated by Laser Powder Bed Fusion

Influence of Proteins and Building Direction on the Corrosion and Tribocorrosion of CoCrMo Fabricated by Laser Powder Bed Fusion

Influence of pore-forming agent on wear resistance of composite coating

The Effect of Si Addition on the Microstructure, Mechanical Properties, and Wear Rate of the Co–Cr–Mo-Based Biomedical Alloys

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