Article
Materials Science, Multidisciplinary
Ihsan Ullah, Qian Xu, Haseen Ullah Jan, Ling Ren, Ke Yang
Summary: The study investigated the application of Sr2+ and Zn2+ co-substituted HA coating on titanium alloy, demonstrating excellent bonding strength and capability to induce apatite layer formation. Cell experiments showed that 10Zn5Sr-HA coating had cytotoxicity, while 5Zn10Sr-HA coating exhibited good bonding strength, bioactivity, biocompatibility, and antibacterial properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Taki Aissou, Jessica Jann, Nathalie Faucheux, Louis-Charles Fortier, Nadi Braidy, Jocelyn Veilleux
Summary: A new method was developed to spray a uniform composite coating of copper nanoparticles and graphene nanoflakes onto a metal substrate using an inductively-coupled radio frequency plasma torch. The resulting coatings exhibited microstructural uniformity, strong coating splats cohesion, and good retention and dispersion of graphene nanoflakes within the copper matrix. Moreover, the copper-graphene composite coatings showed strong antibacterial properties, achieving a 99% reduction of Escherichia coli bacteria within 1 hour.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Xiaomei Liu, Dingyong He, Zheng Zhou, Xingye Guo, Yi Liu, Wenjia Hou, Hua Li
Summary: HA coatings fabricated by atmospheric plasma spraying exhibit high crystallinity, phase purity, and c-axis crystalline orientation, showing enhanced proliferation of osteoblasts cells and antibacterial properties. These findings suggest the potential applications of HA coatings in orthopedic and dental implantation fields.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Arjak Bhattacharjee, Amit Bandyopadhyay, Susmita Bose
Summary: Titanium alloys have excellent fatigue and corrosion resistance, high strength to weight ratio, and poor osseointegration ability, which can lead to implant loosening. Hydroxyapatite coating on titanium surfaces is commonly used to enhance osseointegration. The addition of zinc ions and fluoride improves the biological properties of hydroxyapatite. Parametric optimizations are used to fabricate zinc and fluoride doped hydroxyapatite-coated titanium, resulting in coatings with optimized thicknesses. The doped coatings show higher antibacterial efficacy and osteoblast viability compared to pure hydroxyapatite-coated samples. These coatings have potential applications in load-bearing implants for revision surgeries and immune-compromised patients.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Food Science & Technology
Xiaotong Yang, Qingjun Yu, Xuemei Wang, Wei Gao, Yuansong Zhou, Honghong Yi, Xiaoning Tang, Shunzheng Zhao, Fengyu Gao, Xiaolong Tang
Summary: This article summarizes the mechanism and application of antibacterial agents in spray-type coatings, focusing on inorganic, organic, and natural antibacterial agents. It also discusses the factors that affect the spraying effect and the formation mechanism of spray-type coatings.
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Tengfei Meng, Shu Cai, Lei Ling, You Zuo, Hao Tian, Huanlin Zhang, Hang Zhang, Guohua Xu
Summary: Recently, there is increasing interest in superhydrophobic magnesium-based implants due to their superior corrosion resistance and specific anti-bacterial adhesion properties. However, the superhydrophobic surface hinders cell adhesion and proliferation, limiting the application of these implants. In this study, a superhydrophobic composite coating composed of hydroxyapatite, bismuth sulfide, and lauric acid was prepared on AZ31B Mg alloys. The composite coating exhibited a water contact angle of 156 degrees, providing excellent corrosion resistance and antibacterial properties. Additionally, the surface of the coating could be transformed from superhydrophobic to hydrophilic upon near-infrared light irradiation, offering effective protection for the Mg alloy substrate. The coated Mg alloy demonstrated high antibacterial efficiency against Staphylococcus aureus and Escherichia coli, and good biocompatibility with favorable cell viability and early cell growth and adhesion.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yuxiang Zhao, Yuxue Ge, Xiaochao Jin, Denise Koch, Robert Vassen, Yao Chen, Xueling Fan
Summary: This paper focuses on the oxidation behavior of novel double-ceramic-layer thermal barrier coatings (DCL TBCs) deposited by atmospheric plasma spraying (APS) and suspension plasma spraying (SPS). Results showed that the developed APS-SPS DCL TBCs have better oxidation resistance than the single layer SPS TBC. In terms of oxidation rate and lifetime, segmented APS-SPS TBCs perform slightly better than columnar APS-SPS TBCs. Among the various APS-SPS TBCs, segmented dense APS-SPS TBCs with low vertical crack density appear to have more potential for industrial application.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
Shiming Xie, Chen Song, Shaowu Liu, Pengjiang He, Frederic Lapostolle, Didier Klein, Chunming Deng, Min Liu, Hanlin Liao
Summary: The study utilized low-pressure suspension plasma spraying (LPSPS) to prepare high-density nanostructured coatings, with findings suggesting that the environmental atmosphere plays a critical role in the microstructure of the coatings. A high-density nanostructured YSZ coating was successfully prepared by atmosphere control based on proposed deposition mechanisms in different atmospheres.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Szymon Kowalski, Weronika Gonciarz, Radoslaw Belka, Anna Goral, Magdalena Chmiela, Lukasz Lechowicz, Wieslaw Kaca, Wojciech Zorawski
Summary: Through the research, it was found that the distance of air plasma spraying had a negligible impact on the biocompatibility of hydroxyapatite coatings. Coatings sprayed at a distance of 120 mm showed a slight increase in biological properties tested. Additionally, hydroxyapatite coatings sprayed at different distances were not cytotoxic and did not activate NF-kB.
Article
Engineering, Mechanical
Han Hu, Lin Mao, Jinkun Xiao, Guodong Sun, Hanlin Liao, Chao Zhang
Summary: Atmospheric plasma spraying was used to deposit CT65 ceramic composite coatings on 304 stainless steel substrates. The influence of hydrogen flow rates on coating structure, hardness, and compactness was evaluated. The results showed that increasing hydrogen flow rate reduced coating wear rate and changed the wear mechanism from abrasive to adhesive.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
E. Canas, E. Rosado, C. Alcazar, M. J. Orts, R. Moreno, E. Sanchez
Summary: By using thermal spraying from concentrated aqueous suspensions, the possibility of obtaining coatings with significant amounts of preserved zircon has been evaluated successfully. The microstructural features of the coatings and the quantification of zircon content have been characterized.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Swarnima Singh, Krishna Kant Pandey, Anup Kumar Keshri
Summary: By increasing the plasma power from 20 to 35 kW, the hydroxyapatite coating on titanium alloys became denser, leading to improved corrosion resistance due to reduced pores and voids in the coatings.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Natalia Bulina, Denis K. Rybin, Svetlana Makarova, Dina Dudina, Igor S. Batraev, Alexey Utkin, Igor Yu Prosanov, Mikhail Khvostov, Vladimir Yu Ulianitsky
Summary: Hydroxyapatite (HA) is a suitable mineral for bone tissue engineering and coating metallic implants to enhance their biocompatibility and osteoinductive properties. Deposition of HA coatings on medical titanium alloy implants using detonation spraying technique showcased the potential for producing HA coatings on implants with complex geometries.
Article
Materials Science, Ceramics
Jarnail Singh, Sukhpal Singh Chatha, Hazoor Singh
Summary: The study showed that with the increase of CS content in the HA coating, the corrosion resistance of HA-CS coatings improved. Additionally, surface roughness, porosity, microhardness and crystallinity increased with the increase of CS content in HA.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Hediyeh Khatibnezhad, Fabian Ambriz-Vargas, Fadhel Ben Ettouil, Christian Moreau
Summary: By coating sub-stoichiometric TiO2-x films on stainless steel substrates and annealing at different temperatures, it is possible to enhance the photocatalytic activity and improve the degradation of methylene blue. Research on TiO2-x coatings indicates that oxygen vacancies have a positive effect on photocatalytic activity, reducing charge recombination rates by introducing energy levels.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)