Construction of lubricant composite coating on Ti6Al4V alloy using micro-arc oxidation and grafting hydrophilic polymer

Wang, Kun; Xiong, Dangsheng

doi:10.1016/j.msec.2018.04.057

Cited by 27 publications

(16 citation statements)

References 29 publications

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“…It was found that the carburized region was consisted of a double-layer structure with an outer TiC ceramic layer and an inner carbon diffusion zone. These two sublayers were closely interlinked to Ti 13 Nb 13 Zr substrate mainly due to the metallurgical bonding through carburization, which provided an excellent bonding stability [27]. In contrast, the carburized region of ETSC0 and ETSC10 samples were so thin and discontinuous that they cannot covered the matrix completely, whilst two sublayers grew inwards significantly as the holding time exceeded.…”

Section: The Growth Mechanism Of Tic Ceramic Layermentioning

confidence: 99%

“…And the morphology analysis revealed that zirconia ball had almost no wear mark after sliding against titanium cermet, indicating excellent wear behavior of titanium cermet/zirconia counterparts. With regard to the wear reduction, the effect of calf serum diluted fluid should also be taken into account [27]. On one hand, the surface micro-pores structure of titanium cermet was conducive to generate the reversed press force under lubrication leading to the decreasing contact area between friction pairs.…”

Section: Tribological Propertiesmentioning

confidence: 99%

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Structure, tribological properties, and the growth mechanism of in-situ generated TiC in titanium cermet

et al. 2021

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Titanium cermet combining metallic toughness with ceramic wear resistance has been proven to be a potential candidate for implanted joint material. In this work, titanium cermet was synthesized by means of the elevated temperature solid carburizing technology. The Ti13Nb13Zr alloy surface was found to be converted into TiC ceramic layer combined with a carbon strengthened diffusion zone underneath. The overall thickness of the carburized region grew to about 100 µm after 120 min carburization at 1,500 K. In order to clarify the growth behaviors of TiC ceramic layer, a growth mechanism is proposed. At the beginning of carburizing process, carbonaceous gas decomposed from carburizer due to high temperature and then converted to free atomic carbons through reduction reaction. Then, in-situ generated TiC ceramic layer possessing certain thickness formed on the surface, meanwhile, the inner carbon diffusion zone also grew inwards due to physical diffusion of carbon, and finally forming a gradient carbon distribution. In addition, the tribological behaviors of the new materials were evaluated through reciprocating ball-on-plate sliding wear tests in bovine calf serum. Although there was an increase in friction coefficient, the wear rate decreased by 59.6% due to the formation of the wear-resistant TiC ceramic layer. The wear mechanisms evolved from severe abrasive wear for bare Ti13Nb13Zr alloy to mild adhesive wear for titanium cermet.

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Section: The Growth Mechanism Of Tic Ceramic Layermentioning

confidence: 99%

Section: Tribological Propertiesmentioning

confidence: 99%

Structure, tribological properties, and the growth mechanism of in-situ generated TiC in titanium cermet

et al. 2021

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“…The chain length, grafting density, and branching structure of PEG have been investigated [22−25]. Sulfonic polymers also show good tribological properties [26]. When the phosphate group is hydrated, superlubricity occurs in the phosphonic polymer coating, which is not affected by different loads and speeds [27,28].…”

Section: Frictionmentioning

confidence: 99%

Regulation mechanism of biomolecule interaction behaviors on the superlubricity of hydrophilic polymer coatings

et al. 2020

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Hydrophilic polymer coatings can improve the surface characteristics of artificial implants. However, because they are used in vivo, they inevitably come into contact with biomolecules that affect their interfacial tribological properties. In this paper, the friction behaviors of poly(vinylphosphonic acid) (PVPA)-modified Ti6Al4V and polytetrafluorethylene balls were analyzed using albumin, globulin, aggrecan, and hyaluronic acid as lubricants. The interaction properties and dynamic adsorption characteristics of the biomolecules and PVPA molecules were explored by a quartz crystal microbalance to identify the cause of the friction difference. It was found that protein molecules disturbed the superlubricity of the PVPA-phosphate-buffered saline system because of the formation of a stable adsorption film, which replaced the interfacial characteristics of the PVPA coating. Polysaccharides, with their excellent hydration properties and polymer structure, had an unstable dynamic interaction or zero adsorption with PVPA molecules, and hardly changed the superlubricity of the PVPA and phosphate-buffered-saline system. The influence mechanism of the specific friction of proteins and polysaccharides was analyzed. Interactions were observed among different biomolecules. Polysaccharides can potentially reduce protein adsorption. The result of the synergistic regulation of the friction coefficient for PVPA-modified Ti6Al4V is approximately 0.017. The results of this study will provide a theoretical basis for the use of polymer coatings in vivo.

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“…The friction coefficient curves of the self-lubricating PEO-PTFE composite coating under different loads consistently appeared to be low and stable, indicating that the self-lubricating PEO-PTFE composite coating has a good load-bearing capacity. Recently, Wang et al constructed a lubricant composite coating on Ti6Al4V alloy using micro-arc oxidation and grafting hydrophilic polymer [24]. Results showed that the composite coating exhibited the low friction coefficient and favorable wear resistance in water under a low contact stress of 1.52 MPa.…”

Section: Tribological Behaviorsmentioning

confidence: 99%

Self-Lubricating PEO–PTFE Composite Coating on Titanium

Ren

Wang

Chen

et al. 2019

Metals

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A self-lubricating plasma electrolytic oxidation–polytetrafluoroethylene (PEO–PTFE) composite coating was successfully fabricated on the surface of commercially pure titanium by a multiple-step method of plasma electrolytic oxidation, dipping and sintering treatment. The microstructure and tribological properties of the PEO–PTFE composite coating were investigated and compared with the PEO TiO2 coating and the PTFE coating on titanium. Results show that most of the micro-pores of the PEO TiO2 coating were filled by PTFE and the surface roughness of PEO–PTFE composite coating was lower than that of the PEO TiO2 coating. Furthermore, the PEO–PTFE composite coating shows excellent tribological properties with low friction coefficient and low wear rate. This study provides an insight for guiding the design of self-lubricating and wear-resistant PEO composite coatings.

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Construction of lubricant composite coating on Ti6Al4V alloy using micro-arc oxidation and grafting hydrophilic polymer

Cited by 27 publications

References 29 publications

Structure, tribological properties, and the growth mechanism of in-situ generated TiC in titanium cermet

Structure, tribological properties, and the growth mechanism of in-situ generated TiC in titanium cermet

Regulation mechanism of biomolecule interaction behaviors on the superlubricity of hydrophilic polymer coatings

Self-Lubricating PEO–PTFE Composite Coating on Titanium

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