Improving Biodegradable Mg-Zn(-Ca) Alloys by Surface Treatment via Plasma Electrolytic Oxidation

Materials, Journal Year: 2025, Volume and Issue: 18(4), P. 747 - 747

Published: Feb. 8, 2025

This study investigated the influence of plasma electrolytic oxidation (PEO) preparation time on degradation resistance Mg-1Zn (Z1) and Mg-1Zn-0.4Ca (ZX10) alloys, with comparisons to pure Mg commercial Mg-4Y-3RE-0.4Zr (WE43). PEO layers were formed varying times (5, 10, 15 min) analyzed for microstructure, morphology, corrosion resistance. The results indicated that a 10 min had most homogeneous structure optimal Prolonged increased pore density, crack formation, layer thickness while also promoting during extended immersion in 0.9% NaCl corrosive media. dissolution phosphates from contributes formation protective layer, enhancing long-term These findings demonstrate low-alloyed, biocompatible Mg-Zn(-Ca) alloys can achieve comparable high-performance WE43 through appropriate surface treatment.

Language: Английский

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New insights and perspectives into biodegradable metals in cardiovascular stents: A mini review

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1002, P. 175313 - 175313

Published: June 27, 2024

Language: Английский

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Fabrication and corrosion performance evaluation of LDHs@ZIF-67 composite coatings based on magnesium alloys AZ31

Surface and Coatings Technology, Journal Year: 2024, Volume and Issue: unknown, P. 131551 - 131551

Published: Nov. 1, 2024

Language: Английский

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Bioactive and Protective Calcium Orthophosphate (CaPO4) Deposits on Magnesium and Its Alloys

Corrosion and Materials Degradation, Journal Year: 2025, Volume and Issue: 6(1), P. 9 - 9

Published: Feb. 18, 2025

Research on bone regeneration has always been an intense and challenging field of tissue engineering. Biodegradable metals represent a novel class biomaterials combining superior mechanical qualities with capacity to promote growth. Among them, magnesium (Mg) its alloys have proposed as innovative for grafting therapy due their non-toxic nature comparable properties bones. In addition, they are lightweight, biocompatible biodegradable. They offer several advantages over other implant metals, including reduced stress-shielding effects unnecessity second surgery remove them. Unfortunately, clinical application is limited the rapid degradation rates in rather aggressive physiological conditions. Therefore, development Mg-based implants possessing controlled accordance kinetics healing necessary. On hand, protective yet biodegradable surface coatings emerged useful strategy fulfill diverse requirements, effective corrosion resistance. Calcium orthophosphates (abbreviated CaPO4) excellent candidates producing such well tolerated by living organisms. However, high chemical reactivity low melting point, grafts require specific parameters successful CaPO4 deposition. This paper reviews currently available preparation methods deposits Mg alloys, aiming build up comprehensive knowledge framework deposition techniques, processing parameters, performance measures terms resistance, adhesion strength biocompatibility. The literature analysis shows that increase ability magnesium-based metallic withstand improve biocompatibility surfaces all cases.

Language: Английский

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In Vivo Rat Model Study of Nanocomposite Coated Magnesium-Based Alloy and 3D Printed PLA Implants for Long Bone Regeneration Applications

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

Orthopedic implants play a vital role in restoring function patients with bone and joint disorders, yet improving their biocompatibility mechanical strength remains challenge. This study evaluates the vivo performance of 3D-printed poly L-lactic acid (PLA) AZ31 magnesium (Mg) alloy coated titanium-zirconium (Ti-Zr) titanium hydroxyapatite (Ti-HA) nanocomposites using Wistar rat model. The implants' degradation rates over 60 days were observed, Mg showing reduced (25 32%, respectively) compared to uncoated materials. Nano-CT analysis confirmed progressive regeneration, healing from 10-15% at day 30 60-70% 60. Histological revealed osteoblast osteoclast activity, indicating effective remodeling. These findings suggest that Ti-Zr Ti-HA nanocomposite-coated offer enhanced corrosion resistance, stability, biocompatibility. study's potential enhance efficacy orthopedic therapies advance creation functional fulfill patient requirements superior performance, durability, compliance. Further optimization may establish these coatings as promising candidates for clinical applications.

Language: Английский

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Fe/Cu doped black ceramic coating on magnesium alloy by plasma electrolytic oxidation method based on first principles

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 48, P. 104289 - 104289

Published: April 5, 2024

Language: Английский

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First-principles calculations to investigate the structural, elastic and thermodynamic properties of full-Heusler MgXY2(X = Zn, Cd, Y = Ag, Au, Cu) compounds

Journal of Magnesium and Alloys, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Recent developments in ureteral stent: Substrate material, coating polymer and technology, therapeutic function

Colloids and Surfaces B Biointerfaces, Journal Year: 2024, Volume and Issue: 238, P. 113916 - 113916

Published: April 12, 2024

Language: Английский

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Long-term degradation performance and biocompatibility of plasma electrolytic oxidation coated Mg-0.45Ca-xZn alloys prepared using a fluoride-based electrolyte

Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: 32, P. 926 - 936

Published: July 27, 2024

In this work, plasma electrolytic oxidation (PEO) with a fluoride-based electrolyte was performed on Mg-0.45Ca-xZn (x = 0, 0.45, 1.0, 2.0 wt%) alloys to enhance their degradation properties. These PEO coatings were composed of porous layer and barrier for Zn ≥ 0.45 wt%, while the coating Mg-0.45Ca alloy consisted dense inner outer layer. The content in has no significant effect hardness, adhesion strength composition coating. All coated-Mg-0.45Ca-xZn samples work showed decent anti-degradation properties simulated body fluid (SBF). Among them, Mg-0.45Ca-1.0Zn Mg-0.45Ca-2.0Zn could provide excellent protection substrate over 3 months exhibited good biocompatibility Grade 0–1 cytotoxicity, which expected be applied biomedical field. Besides, process enabled high-quality formed Mg–Ca–Zn bone screws.

Language: Английский

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Nucleation and growth process of a softened-spark layer during microarc oxidation on a selective laser melted Ti alloy

RSC Advances, Journal Year: 2024, Volume and Issue: 14(36), P. 25975 - 25985

Published: Jan. 1, 2024

A two-step method for preparing composite coatings with different composition on Ti alloys using softened spark microarc oxidation technology was proposed. The nucleation and growth processes of a layer, as well the influence sparks deposition anions in electrolytes, were studied. results show that process voltage discharge selective laser-melted Ti6Al4V alloy lower than breakdown its anodic oxide film. prioritized at coating/substrate interface initial area rather area. On one hand, layer grew towards substrate, other molten generated by sparking transferred into external porous layer. inside coating promoted rutile phase formation linear thickness Ca P are mainly distributed or between softened-spark layers. Nevertheless, had little effect micro/nanoporous structures coatings.

Language: Английский

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