Related references
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Article
Materials Science, Multidisciplinary
M. B. Sedelnikova et al.
Summary: The influence of pulsed electron irradiation on beta-tricalcium phosphate micro-arc coatings on Mg0.8Ca alloy was studied. The coating showed a melted layer and a denser transition layer when modified with an energy density of 10 J/cm2. The surface layer of the coating was enriched with calcium and phosphorus, and the adhesive strength of the coating increased. Corrosion activity of the coating was found to be lower compared to the unmodified state.
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Summary: This study investigates the impact of human physiological activity levels on the fatigue life of a porous magnesium scaffold. Dynamic immersion and biomechanical testing were conducted to simulate physiological conditions. Numerical data analysis and computer simulations were used to predict implant failure values. The findings suggest that activity levels play a crucial role in implant fatigue rate.
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Summary: A comprehensive study was conducted on the properties of coatings formed on a magnesium alloy by plasma electrolytic oxidation (PEO) using electrolytes with nanosized particles of anatase (titanium dioxide). The formed coatings exhibit a 2.5-fold reduction in corrosion current density and a 25% increase in hardness compared to coatings without particles. Confocal micro-Raman spectroscopy revealed the presence of anatase and rutile phases in the PEO coating composition due to the incorporation of TiO2 nanoparticles during plasma electrolytic treatment. The presence of titanium dioxide has a positive effect on the photocatalytic properties of the coatings, with a 1.6-fold and 1.8-fold increase in the constant rate of methyl orange and methyl blue decomposition, respectively, compared to coatings formed without TiO2 particles.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
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Engineering, Biomedical
R. Askarnia et al.
Summary: A composite coating with Al2O3 and ZrO2 particles was prepared on AZ31 magnesium alloy using micro-arc oxidation (MAO) technique. The addition of ZrO2 and Al2O3 ceramic particles reduced the surface pores of the composite coating. The hardness of the coating increased from about 380 to 620 MPa with the addition of Al2O3+ZrO2 particles and the wear rate decreased about 8 times. The wettability of the coating was improved by incorporating Al2O3 and/or ZrO2 particles, with Al2O3 being more effective than ZrO2. The antibacterial properties of the MAO coatings showed that Staphylococcus aureus bacteria were more sensitive to zirconia and alumina particles than Salmonella typhimurium bacteria after 24 hours of incubation.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
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Zatul Faqihah Mohd Salaha et al.
Summary: Total hip arthroplasty (THA) is one of the most successful surgical procedures in medicine. However, research has shown that the solid hip implant used in the procedure can cause cortical bone resorption. This study aimed to design a porous hip implant to improve osteointegration and revascularisation.
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Engineering, Biomedical
Mariya B. Sedelnikova et al.
Summary: In this study, porous diatomite biocoatings were created on the surface of a biodegradable Mg alloy using the method of micro-arc oxidation. The addition of ZrO2 microparticles was found to affect the structure and properties of the coatings. The coatings exhibited a porous structure and increased adhesive strength and corrosion resistance with the incorporation of ZrO2 particles.
JOURNAL OF FUNCTIONAL BIOMATERIALS
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Materials Science, Ceramics
Xinyan Wang et al.
Summary: The influence of micro-sized Cr2O3 particles on the corrosion, mechanical, and thermal control performance of plasma electrolytic oxidation coated Mg was studied. The presence of more Cr2O3 particles in the coating resulted in enhanced thermal control and mechanical properties, along with slightly improved corrosion resistance and hardness. Additionally, increased concentration of Cr2O3 particles led to higher absorptance of the coating, possibly due to the low band gap of Cr2O3.
CERAMICS INTERNATIONAL
(2022)
Review
Materials Science, Multidisciplinary
Wenhui Yao et al.
Summary: This article reviews the applications of micro-arc oxidation (MAO) process in surface treatment of magnesium and its alloys. By discussing its mechanism and influencing factors, the applications in various fields are reviewed and future developments are discussed.
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(2022)
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Materials Science, Coatings & Films
Parisa Molaeipour et al.
Summary: Plasma electrolytic oxidation (PEO) is a cost-effective and versatile technique to achieve protective oxide coatings in light metals. In this study, composite coatings containing B4C nanoparticles were successfully produced using PEO technique, and the influence of nanoparticles on the coatings' properties and incorporation mechanism were investigated.
SURFACE & COATINGS TECHNOLOGY
(2022)
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Summary: Magnesium has emerged as a promising biomaterial for bone tissue regeneration and support due to its biodegradability, mechanical properties similar to human bone, osteoconductive nature, and anti-bacterial properties. However, its rapid bio-corrosion is a major concern, which can be addressed through alloying and surface coatings to improve mechanical integrity and degradation rate of magnesium-based implants.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
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Xue Zhang et al.
Summary: The study focused on the performance of Ca-P coatings prepared in solutions with different pH values on pure magnesium substrate, showing that the 5.7Ca-P coating has excellent corrosion resistance and biocompatibility, providing stable protection in the initial degradation stage.
JOURNAL OF ALLOYS AND COMPOUNDS
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M. B. Sedelnikova et al.
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MATERIALS CHARACTERIZATION
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Davide Savio et al.
Summary: Total hip arthroplasty is a common and successful orthopedic surgery, but periprosthetic osteolysis associated with the stress-shielding effect can lead to surgical failure. This paper explains the impact of stress shielding on hip joint replacement and suggests solutions through literature survey and experimental studies, including redefining prosthetic design criteria, improving osteointegration process, and using innovative biomaterials.
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Materials Science, Ceramics
Maryam Molaei et al.
Summary: This study investigated the effects of incorporating different concentrations of anatase-TiO2 nanoparticles on the properties of porous coatings produced by plasma electrolytic oxidation (PEO) process on pure titanium. The results showed that adding TiO2 nanoparticles improved the corrosion resistance, cell compatibility, and antibacterial properties of the coatings.
CERAMICS INTERNATIONAL
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Materials Science, Multidisciplinary
Bahram Vaghefinazari et al.
Summary: This study explores the corrosion inhibition effect of 8-hydroxyquinoline (8HQ) on a PEO-coated AZ21 magnesium alloy. The corrosion inhibition mechanism is attributed to the extensive precipitation of insoluble complex between 8HQ molecules and Mg(2+) on top of the PEO layer.
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Materials Science, Multidisciplinary
Hanane Mozafarnia et al.
Summary: Plasma electrolytic oxidation (PEO) is a promising surface treatment that can generate thick and corrosion-resistant coatings on valve metals. In this study, PEO was used to modify the surface of AZ31 Mg alloy by incorporating titanium dioxide nanoparticles (NPs) into a phosphate-based electrolyte. The composite coatings showed improved porosity, thickness, roughness, and wettability. The coatings exhibited superior corrosion resistance in simulated body fluid (SBF) and demonstrated good wear and antibacterial properties.
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A.S. Gnedenkov et al.
Journal of Magnesium and Alloys
(2022)
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Guodong Hao et al.
Summary: The study found that ceramic coatings with aluminum titanuate prepared using pulsed bi-polar micro-arc oxidation on titanium alloy exhibited distinct discharge channels and pores, and demonstrated good oxidation resistance at high temperatures. The hardness of the coatings was inversely proportional to the electrolyte concentration, with higher concentration coatings showing better thermal shock resistance and oxidation resistance compared to lower concentration coatings.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
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V. V. Chebodaeva et al.
Summary: The effect of introducing charged aluminum oxyhydroxide nanoparticles into porous coatings formed by micro-arc oxidation on their electrical potential and structure was studied. The modification resulted in changes in the morphology and elemental composition of the coatings. The introduction of aluminum oxyhydroxide nanoparticles improved the corrosion properties of the coatings.
LETTERS ON MATERIALS
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Ting Wu et al.
Summary: A comparison of PEO layers formed in different electrolytes reveals that the phosphate-based electrolyte is the most promising one. The compositions and structures of the coatings formed in different electrolytes vary. All the coatings exhibit good corrosion resistance and photocatalytic performance.
APPLIED SURFACE SCIENCE
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A. D. Kashin et al.
Summary: The current study presents the experimental and analytical investigation of a new protective coating for orthopedic magnesium implants. The coating, synthesized via the micro-arc oxidation method, showed excellent physical, electrochemical, and mechanical properties. It significantly improved the corrosion resistance of the implants and reduced cytotoxic effects, making it a promising biogenic tool for enhancing biocompatibility.
CERAMICS INTERNATIONAL
(2022)
Review
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Jing Wang et al.
Summary: This review discusses the rapid development of magnesium alloys in the field of biomedical materials, covering their properties, corrosion mechanism, optimization of mechanical properties, and surface coating preparation. Effective methods such as heat treatment, plastic deformation, alloying, and surface modification have been adopted to address the poor mechanical properties and high corrosion rate of magnesium-based materials. The review also provides a detailed discussion on the applications of magnesium alloys, such as bone fixation and vascular stents.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
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S. Fida Hassan et al.
Summary: This article attempts to provide a comprehensive overview of biodegradable magnesium alloys, focusing on the biocompatibility of alloying elements, degradation characteristics, microstructure, and mechanical properties of binary alloys. The work processes for alloy preparation and surface modifications are highlighted, and a brief review of magnesium composites is included to offer a more complete picture of the topic.
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Materials Science, Multidisciplinary
Mariya Sedelnikova et al.
Summary: The introduction of particles into coatings can enhance their properties and possibilities. In this study, coatings containing beta-tricalcium phosphate (beta-TCP) and wollastonite microparticles, both separately and in combination, were created on an Mg0.8Ca alloy surface. Various characterization techniques were used to examine the structure, morphology, physical, mechanical, corrosive, and biological properties of the coatings. The results showed that the type of particles significantly influenced the properties of the coatings.
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Materials Science, Multidisciplinary
Sandeep Jhamb et al.
Summary: Due to their low density and high mechanical and physical properties, magnesium matrix composites have potential applications in aerospace and defense. The addition of reinforcement components can greatly impact creep and fatigue parameters compared to traditional materials. This paper outlines the effects of various reinforcements on magnesium and its alloys, discusses the performance of magnesium metal matrix composites in mechanical testing, and describes the manufacturing processes and prospects for magnesium-based composites.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
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Materials Science, Biomaterials
Fan Wang et al.
Summary: In this study, a micro-arc oxidation (MAO) coating containing titanium dioxide (TiO2), gallium oxide (Ga2O3), and tantalum oxide (Ta2O5) was fabricated on the titanium surface (MGT). The results showed that MGT exhibited optimized surface performance, outstanding corrosion resistance, good cytocompatibility, and improved cellular responses. Moreover, MGT demonstrated excellent antibacterial effects and possessed great potential for bone repair applications.
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Metallurgy & Metallurgical Engineering
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Summary: The study highlights the good biocompatibility and mechanical properties of magnesium and its alloys, but emphasizes the need for controlling the corrosion rate in the body. Plasma electrolytic oxidation coatings can provide porous and biocompatible coatings, while calcium phosphate compounds show promise in improving biological properties.
JOURNAL OF MAGNESIUM AND ALLOYS
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Summary: This study investigated the surface characteristics of WO3-MgO oxide layers formed on AZ31 Mg alloy via micro-arc oxidation (MAO) with different concentrations of WO3 nanoparticles. The addition of 2 g/L of WO3 nanoparticles led to a uniform distribution throughout the thickness of the oxide layer and improved corrosion resistance.
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S. Ignjatovic et al.
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APPLIED SURFACE SCIENCE
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Review
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Summary: Titanium and its alloys are widely used in orthopedic and dental implants due to their stable chemical properties and good biocompatibility. However, issues such as aseptic loosening and peri-implant infection still exist. Recent advancements in surface modification have provided strategies to enhance the bio-function and anti-infection properties of titanium implants, aiming to improve the interaction between these devices and the local biological environment.
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