Nano‐adhesion and friction of multi‐asperity contact: a molecular dynamics simulation study

Si, Lina; Wang, Xiaoli; Xie, Guoxin; Sun, Na

doi:10.1002/sia.5797

Cited by 13 publications

(2 citation statements)

References 41 publications

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“…However, severe plastic deformatio n was observed. This could be due to the multi-asperity contact between the two surfaces [64,65]. Fretting wear was started by the rough surface contact between CoCrMo and Ti alloy at a nanoscale.…”

Section: Discussionmentioning

confidence: 99%

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Improving fretting corrosion resistance of CoCrMo alloy with TiSiN and ZrN coatings for orthopedic applications

Tsai

Hung²,

et al. 2021

Journal of the Mechanical Behavior of Biomedical Materials

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Total hip replacement is the most effective treatment for late stage osteoarthritis. However, adverse local tissue reactions (ALTRs) have been observed in patients with modular total hip impla nts. Although the detailed mechanisms of ALTRs are still unknown, fretting corrosion and the associated metal ion release from the CoCrMo femoral head at the modular junction has been reported to be a major factor. The purpose of this study is to increase the fretting corrosion resistance of the CoCrMo alloy and the associated metal ion release by applying hard coatings to the surface. Cathodic arc evaporation technique (arc-PVD) was used to deposit TiSiN and ZrN hard coatings on to CoCrMo substrates. The morphology, chemical composition, crystal structures and residual stress of the coatings were characterized by scanning electron microscopy, energy dispersive x-ray spectroscopy, and X-ray diffractometry. Hardness, elastic modulus, and adhesion of the coatings were measured by nano-indentation, nano-scratch test, and the Rockwell C test. Fretting corrosion resistance tests of coated and uncoated CoCrMo discs against Ti6Al4V spheres were conducted on a four-station fretting testing machine in simulated body fluid at 1Hz for 1 million cycles. Post-fretting samples were analyzed for morphological changes, volume loss and metal ion release. Our analyses showed better surface finish and lower residual stress for ZrN coating, but higher hardness and better scratch resistance for TiSiN coating. Fretting results demonstrated substantial improvement in fretting corrosion resistance of CoCrMo with both coatings. ZrN and TiSiN decreased fretting volume loss by more than 10 times and 1000 times, respectively. Both coatings showed close to 90% decrease of Co ion release during fretting corrosion tests. Our results suggest that hard coating deposition on CoCrMo alloy can significa ntly improve its fretting corrosion resistance and could thus potentially alleviate ALTRs in metal hip implants.

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Section: Discussionmentioning

confidence: 99%

“…However, severe plastic deformatio n was observed. This could be due to the multi-asperity contact between the two surfaces [64,65].…”

Section: Discussionmentioning

confidence: 99%

Improving fretting corrosion resistance of CoCrMo alloy with TiSiN and ZrN coatings for orthopedic applications

Tsai

Hung²,

et al. 2021

Journal of the Mechanical Behavior of Biomedical Materials

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Experimental investigation of the adhesion force of single and double‐layer coatings on MEMS surfaces

Joulaei

Kolahdoozan

Salehi

et al. 2018

Surface & Interface Analysis

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Adhesion force is one of the most important factors in microelectromechanical systems (MEMS), especially for microassembly. It depends on operating conditions and is affected by the contact area. In this study, the adhesion force between MEMS materials and AFM tips was analysed using AFM's point-mode spectroscopy. The aim was to study the effectiveness of various coatings in MEMS adhesion surfaces.For this purpose, five silicon surfaces were used, four of which were coated, and one was noncoated. Two of them were deposited by single-layer coating (Au and Ag). The other two were deposited by double-layer coating (TiO 2 /Au, TiO 2 /Ag) on a Si (1 0 0) substrate. The depositing was accomplished by the thermal evaporation method. Composite materials and analysis were reviewed by observing the SEM image. The experimental results showed that the method of deposition helped to decrease the adhesion force between the probe tip and the surface of the specimens, and double-layer coating had stronger effect on decreasing the adhesion force than the single-layer coating.

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Effects of Surface Roughness on the Kinetic Friction of SiC Nanowires on SiN Substrates

2017

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Nano‐adhesion and friction of multi‐asperity contact: a molecular dynamics simulation study

Cited by 13 publications

References 41 publications

Improving fretting corrosion resistance of CoCrMo alloy with TiSiN and ZrN coatings for orthopedic applications

Improving fretting corrosion resistance of CoCrMo alloy with TiSiN and ZrN coatings for orthopedic applications

Experimental investigation of the adhesion force of single and double‐layer coatings on MEMS surfaces

Effects of Surface Roughness on the Kinetic Friction of SiC Nanowires on SiN Substrates

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