Materials Research Express
·
2020
·Vol. 7
·期 1
·016438
·
IF 1.929
Yong Lian,Xianyi Dai,Jin Zhang
In the present work, particles of SiC were applied to the micro-arc oxidation (MAO) treatment of Ti6Al4V, characterization of MAO coatings with different SiC particle concentration were evaluated. X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM) results show that the structure and morphology of MAO ceramic coatings could change with different amounts of SiC in the electrolyte. Both of the number and size of the pores on the ceramic coating surface were decreased, while the layer thickness increased with the increase in SiC particles in the electrolyte. A dense double-layer structure coating composed of a Ti-based layer and a SiC-based layer with a thickness of about 40 μm was prepared. It was shown that the addition of SiC particles participated in the process of micro-arc oxidation and changed the microstructure of MAO coating.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 18
·6206
·
IF 3.748
Guangyan Zhu,Qian Peng,Ting Luo,Hao Pan,Yuehong Wang,Zhiwei Peng
The feasibility of synthesis of Ti6Al4V/SrFHA (Ca9.37Sr0.63(PO4)6F2) composites via coating strontium and fluorine co-doped HA to Ti6Al4V substrate by microwave-assisted liquid phase deposition and calcination was evaluated, with a focus on the effect of the deposition temperature from 30 °C to 70 °C. The outcomes demonstrate that strontium and fluorine can be successfully doped into HA to form a SrFHA coating with modified micromorphology which is deposited on the alloy. When the deposition temperature was 50 °C, the coating with the largest uniform continuous SrFHA coverage was obtained. After calcination, the adhesion strength and Vickers microhardness of the Ti6Al4V/SrFHA composite increased from 0.68 MPa and 323 HV to 2.41 MPa and 329 HV, respectively, with a decrease in the water contact angle from 10.88° to 7.24°, exhibiting enhancement of both mechanical properties and wettability. Moreover, the composite obtained at the deposition temperature of 50 °C exhibited good bioactivity based on the simulate body fluid (SBF) test. On account of the above features primarily as a result of the combined effect of the co-doping of strontium and fluorine, high crystallinity of SrFHA, large surface roughness, and formation of the titanium oxide transition layer, the Ti6Al4V/SrFHA composite shows great potential in dental implantology.Keywords:microwave processing;liquid phase deposition;co-doping;HA;Ti6Al4V
研究领域:
材料科学
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生物医学工程
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DOI
PubMed
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Hui Wang,Dongdong He,Weidong Huang,Xinxi Chen,Yu Wang,Lihong Huang
In this study, LaB 6 -reinforced Ti6Al4V was successfully fabricated by the selective laser melting (SLM) process. TiB and La 2 O 3 with particle-like shapes formed uniformly after the in-situ reaction of LaB 6 and Ti6Al4V. The sizes of the TiB and La 2 O 3 particles were around 1 µm and 200 nm, respectively. Due to a combined strengthening effect of the micrometer-scale and nanoscale reinforcements, the mechanical properties of the LaB 6 /Ti6Al4V samples were enhanced significantly. However, the effect was highly related to the SLM parameters. As the laser power increased, the TiB changed from particle to needle-like shape and La 2 O 3 tended to aggregate and grow into a larger size. Besides, the martensite α-Ti also became coarser, which was disadvantageous to the mechanical performance. The desired inner structure can be obtained by adjusting the processing parameters of the SLM. The best mechanical performance of the SLM LaB 6 /Ti6Al4V samples was achieved at the laser power of 260 W and the scanning speed of 500 mm/s. The maximum tensile strength and Vickers hardness were 1337.1 MPa and 477.62 HV, respectively, which outperformed the other counterparts significantly. Thus, the results suggest that the in-situ reaction of LaB 6 and Ti6Al4V can improve the mechanical properties of the Ti6Al4V alloys effectively.
研究领域:
材料科学
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增材制造
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DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2022
·Vol. 32
·期 14
·6123-6132
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IF 2.036
Deng Yaling,Xu Yu,Ni Xingya,LiYu Wencheng,Wang Yuxin,Yang Zhong
This study investigated the mechanical and tribological properties of branched polyethyleneimine/polyacrylic acid (bPEI/PAA) coatings. (bPEI/PAA) coatings were prepared on Ti6Al4V substrate using layer-by-layer assembly technique. The coatings have good tribological behaviors with the rotating mode under the deionized water. In particular, (bPEI/PAA) 40 has the lowest friction coefficient with the reciprocating mode, about 0.14. The cross-linked network structures were formed with the electrostatic attraction. The amorphous phase of coatings provides a crucial buffer during the loads applying on the surface. The (bPEI/PAA) n coatings have the swelling ability, and there are large decreases of storage modulus and loss modulus in deionized water compared with removing from the deionized water. The excellent tribological properties are ascribed to the cross-linked network structure, amorphous phase, and swelling ability.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2021
·
IF 4.872
Chao Yang,Suihan Cui,Zhongcan Wu,Jiayu Zhu,Jian Huang,Zhengyong Ma,Ricky K.Y. Fu,Xiubo Tian,Paul K. Chu,Zhongzhen Wu
Titanium alloys are important aerospace metals but suffer the poor mechanical property in high-loading area. Plasma electrolytic oxidation can improve their hardness and reduce friction but the precursor competition of functional phases in PEO electrolyte is inevitable. This work provides a new strategy to avoid ions competition and precipitation by choosing anionic salt (K 2 ZrF 6 ) and cationic salt (Ce(Ac) 3 ) as the precursors of the hard phase (ZrO 2 ) and lubrication phase (monoclinic CePO 4 ), respectively. As a result, the ions competition is avoided to achieve simultaneous high-content doping of functional phases. The optimized coating shows a maximum hardness of 626 HV, small friction coefficient of 0.12 and a lower wear rate of only 3.1 × 10 −5 ± 0.15 mm 3 N −1 m −1 , indicating excellent long-term self-lubrication property and wear resistance.
研究领域:
材料科学
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表面工程
·
机械工程
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产品关联
DOI
高影响因子
WEAR
·
2022
·
IF 4.695
Dongya Zhang,Xin Du,Ao Bai,Liping Wang
In this study, micro-arc oxidation (MAO) coatings were fabricated and modified graphene (MGr) was used as an oil additive to enhance the tribological properties of Ti6Al4V. The results show that: the friction coefficient of Ti6Al4V is significantly reduced when lubricated by the modified oil, and the friction coefficients of the MAO coatings are much lower than those of Ti6Al4V with Polyα olefin synthetic oils that are added with modified graphene (PAO–MGr). The mainly wear form of Ti6Al4V is mainly adhesive, while that of the MAO coating is abrasive. Furthermore, the peaks of typical graphene were observed in the friction region using Raman spectroscopy . The modified graphene enters the porous structure of the MAO coating and forms a stable graphene transfer film, thereby achieving a low friction coefficient and wear.
研究领域:
材料科学
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摩擦学
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DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2021
·
IF 4.158
Dexin Chen,Yaoxin Li,Hongyuan He,Wei Li,Rong Zeng,Xiaojian Wang
Silver antibacterial composite coatings were prepared on additive manufactured Ti6Al4V substrates by merging anodic oxidation , molecular grafting, and spray deposition methods. The surface microstructure, composition, elemental characteristics, and antibacterial properties of the composite coatings were obtained. When the anodizing time was varied from 0.5 to 4 h, the results revealed that the average inner diameter of TiO 2 nanotubes (TNTs) increased from 19.9 nm to 78 nm and the average wall thickness decreased from 22.9 nm to 12.8 nm, concluding the optimized voltage of 40 V and anodizing time of 1 h. X-ray diffraction spectra depicted that the structure of TNTs transformed to the more stable anatase phase with a small amount of rutile phase after annealing. After molecule grafting, silanes are covalently bonding to the TNTs via amino groups and Si-O-Si networks. With the help of the covalent bonding between Ag and TNTs, the Ag + release has been slowed down significantly from 1.127 ppm to 0.17 ppm. Bare TNTs show a certain antibacterial effect with an antibacterial rate of 57.5% for E. coli and of 50.1% for S. aureus . When the spraying pass for Ag deposition is 10, the prepared AgNPs embedded coatings have significantly improved the antibacterial properties, as the antibacterial efficiencies are 100% for all these silane-modified TNTs surfaces.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Xianxing Xu,Hailun Xu,Qihao Chai,Ziyang Li,Zhentao Man,Wei Li
Total hip arthroplasty (THA) is the most common and radical treatment for end-stage hip disease. Prosthesis loosening and periprosthetic infection are the most serious complications after THA, which may lead to prosthetic dysfunction. The early prevention of infection and the promotion of fast osseointegration between the prosthesis and host bone are essential to the success of THA. However, Ti6Al4V does not have biological function, such as promoting osseointegration and antibacterial properties, which limits its widespread use. Therefore, it is necessary to design a functional hip prosthesis to simultaneously reduce the incidence of loosening and periprosthetic infection. In this study, we developed a novel functionalized coating via micro-arc oxidation modification combined with vancomycin to treat a prosthetic surface for the early postoperative period to resist bacterial infection and promote osseointegration. The functionalized coating simultaneously prevents periprosthetic infections and promotes osseointegration at the prosthesis–host bone interface. We successfully constructed a prosthetic coating with the dual function of promoting osseointegration and preventing infection, which provides a practical and effective method for the treatment of periprosthetic infection and prosthetic loosening after THA.
研究领域:
生物医学工程
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骨科
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材料科学
·
生物材料
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 6
·1-9
·
IF 2.426
Deng Yaling,Sun Jianjun,Ni Xingya,Yu Bo
Natural joints have the hierarchical structure of bone and cartilage, providing excellent lubrication and load-carrying capacity. In our research, the hierarchical structure artificial joints of Poly Acrylic Acid (PAA)- Poly Acrylamide (PAAm) hydrogel coating and Ti6Al4V substrate were formed using a simple yet versatile method by mimicking the hierarchical structure of natural joints. The efficient lubrication at friction interfaces was achieved. The composition and microstructure were confirmed by Fourier-transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM). The hydrogel coatings were successfully prepared on the surface of Ti6Al4V substrate through the adsorption of the charged group. This hierarchical structure material exhibits the lower dynamic friction, approximately 0.085, which is much lower than bare Ti6Al4V, about 0.429. The wear on the surfaces after the tribological experiment is super-shallow and has no significant fracture area around the scratch. The PAA-PAAm hydrogel has a more uniform and compact cross-linked network porous structure, and the porous size is much smaller than PAA hydrogel. The cross-linked network porous structure is the main factor accounting for the low dynamic friction. This hierarchical structure of soft and hard improve the load-carrying ability and has the potential uses in artificial joints.
研究领域:
生物材料学
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摩擦学
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医学工程
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DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 19
·6450
·
IF 3.4
Di Le,Jie Pan,Haixia Xing
To chemically functionalize the Ti6Al4V alloy surface, a custom-made low-temperature atmospheric pressure plasma reactor device was used to polymerize heptylamine on it. The effect of different deposition times, an important process parameter, was also investigated. For each deposition time group, the surface morphology was observed via scanning electron microscopy (SEM). The surface chemical content was analyzed via X-ray photoelectron spectroscopy, and surface hydrophilicity was measured via water contact angle. The adhesion of bone marrow stromal cells (BMSCs) on the modified Ti6Al4V alloy surfaces was also observed via SEM. A quantitative evaluation of cell proliferation was performed via the Cell Counting Kit-8 assay. The results revealed that amino groups were introduced on the Ti6Al4V alloy surface via plasma-polymerized heptylamine (PPHA). The percentages of NH2/C for various deposition times (0 s, 30 s, 45 s, 60 s, 90 s, and 120 s) were 3.39%, 5.14%, 6.71%, 6.72%, 7.31%, and 7.65%. A 30 s, 45 s, and 60 s deposition time could significantly increase surface hydrophilicity with a mean water contact angle of 62.1 ± 1.6°, 65.7 ± 1.1°, and 88.2 ± 1.4°, respectively. Meanwhile, a 60 s, 90 s, and 120 s deposition time promoted BMSCs cell adhesion and proliferation. However, this promotion effect differed non-significantly among the three groups. In conclusion, the introduction of amino groups on the Ti6Al4V alloy surface exhibited surface modification and enhancement of cell adhesion and proliferation, which was partially associated with deposition time.Keywords:surface modification;heptylamine;plasma polymers;polymerization;titanium alloy;Ti6Al4V
研究领域:
生物材料学
·
细胞生物学
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产品关联
DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Lingling Cui,Yifan Lu,Chenyang Gong,Hang Li,Jiewen Huang,Dangsheng Xiong
Artificial joints are facing challenges of high friction and severe wear, which limits their application in the high stress-loading conditions of joint bearing interfaces. Inspired by the soft/hard structure of articular cartilage/subchondral bone in a natural joint and the presence of lubricating proteoglycan/lubricin on cartilage surface, a polyanionic hydrogel coating rich in carboxylates/sulfonates was constructed on a porous Ti6Al4V substrate through ultraviolet radiation combined with metal ion bridging method. In addition, metal ions were adopted to form ionic coordination bonds with the polyanionic hydrogel layer to enhance its mechanical properties . Characterization results showed that the hydrogel layer was firmly adhered to the porous Ti6Al4V surface, and the as-obtained metal ion reinforced hydrogel/Ti6Al4V joint bearing interfaces displayed improved hydrophilicity and mechanical properties. Notably, compared with Al 3+ and Fe 3+ , Ca 2+ reinforced PVA-PAA-PSPMK/DT-Ti6Al4V joint bearing interface in deionized water exhibited a lower friction coefficient (∼0.068), which was similar to that of fresh porcine cartilage, and only slight scratches on the worn surface. Moreover, after 4 h of lubrication in phosphate buffer (PBS) or calf serum , its stable and low friction coefficient further revealed its great application potential in physiological environments. The lubrication mechanisms were also discussed in detail. This work presents a simple and effective method to develop hydrogel/Ti6Al4V bionic composite joint bearing interfaces with advanced performance.
研究领域:
材料科学
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生物医学工程
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yaling Deng,Lei Nie,Yu Xu,Chenhong Gao,Zhe Wu
The development of highly effective bio-lubricant coatings for arthritis treatment is extremely demanded. Herein, inspired by the efficient lubrication of articular cartilage, acrylic acid (AA) with (3-(methacryloylamino) propyl) dimethyl (3-sulfopropyl) ammonium hydroxide (MPDSAH) hydrogel coatings containing nanoparticles on Ti6Al4V substrate were designed and fabricated via UV grafting technology. SiO 2 and SiO 2 grafted with PAA polymer brushes (SiO 2 -g-PAA) were separately doped into the PAA-PMPDSAH hydrogel. The PAA-PMPDSAH/SiO 2 -g-PAA exhibits good tensile and compressive properties compared with PAA-PMPDSAH/SiO 2 hydrogel, with an enhancement of 183.4% in tensile modulus and 60.8% in compressive modulus. The PAA-PMPDSAH/SiO 2 -g-PAA hydrogel coatings exhibit a low wear volume, 2.9 ± 0.16 × 10 6 μm 3 , representing a decline of 32.1% and 61.3% compared with the PAA-PMPDSAH and PAA-PMPDSAH/SiO 2 hydrogel coatings, respectively. The antiwear performance has obviously improved. The hydrophilic PAA polymer brushes prevent the agglomeration of nanoparticles and promote homogeneously dispersion within the hydrogel. The three-dimensional crosslinked network structure of hydrogel effectively protects the structural integrity of the polymer brushes, thereby facilitating enduring lubrication properties. This work provides a strategy for promising artificial joint lubrication in biomedical fields.
研究领域:
生物医学工程
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）