Innovative plasma spray coating of HA-Ti-MgO composite on Ti6Al4V alloy for enhanced performance

IF 4.5 3区医学 Q2 ENGINEERING, BIOMEDICAL

Journal of Materials Science: Materials in Medicine Pub Date : 2025-07-31 DOI:10.1007/s10856-025-06920-4

Negin Nadian, Salman Nourouzi, Hamed Jamshidi Aval

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Abstract

In this study, an innovative hydroxyapatite–titanium–magnesium oxide composite coating was successfully fabricated on Ti₆Al₄V alloy using plasma spraying to enhance its mechanical and corrosion performance for biomedical applications. Granulation of nano-sized HA powder (~100 ± 20 nm) produced spherical agglomerates in the range of 5–20 µm, ensuring suitable flowability for uniform coating deposition. SEM analyses confirmed dense and crack-minimized layers for both pure HA (~105 µm thick) and composite (~98 µm thick) coatings. XRD revealed the formation of additional CaTiO₃ and MgO phases in the composite, strengthening interfacial bonding. The composite coating exhibited a significant improvement in adhesion strength, reaching 29.2 ± 3.4 MPa, compared to 6.9 ± 0.6 MPa for pure HA. Vickers hardness also increased from 431.3 ± 5.8 HV (HA) to 537.9 ± 1.9 HV (composite coating), outperforming the uncoated Ti₆Al₄V substrate (360.8 ± 1.7 HV). Electrochemical tests showed that the composite coating achieved a lower corrosion current density (9.72 × 10⁻⁸ A/cm²) and higher polarization resistance (41.2 kΩ·cm²) than the HA-only coating (1.19 × 10⁻⁶ A/cm², 28.9 kΩ·cm²), indicating enhanced corrosion resistance.

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在Ti6Al4V合金上创新等离子喷涂HA-Ti-MgO复合材料，以提高性能。

在本研究中，利用等离子喷涂技术在Ti6Al4V合金表面成功制备了一种新型羟基磷灰石-钛-氧化镁复合涂层，以提高其机械和腐蚀性能，并应用于生物医学领域。纳米级HA粉末（~100±20 nm）的造粒产生的球形团块在5-20µm范围内，确保了合适的流动性，以均匀沉积涂层。SEM分析证实了纯HA（~105µm厚）和复合（~98µm厚）涂层的致密和裂纹最小化。XRD分析表明，复合材料中还形成了CaTiO3和MgO相，增强了界面结合。复合涂层的结合强度达到29.2±3.4 MPa，而纯HA涂层的结合强度为6.9±0.6 MPa。维氏硬度也从431.3±5.8 HV （HA）提高到537.9±1.9 HV（复合涂层），优于未涂层Ti6Al4V基体（360.8±1.7 HV）。电化学测试结果表明，复合涂层的腐蚀电流密度（9.72 × 10-8 a /cm2）低于纯ha涂层（1.19 × 10-6 a /cm2, 28.9 kΩ·cm2），极化电阻（41.2 kΩ·cm2）高于纯ha涂层（28.9 kΩ·cm2），表明复合涂层的耐蚀性增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Science: Materials in Medicine 工程技术-材料科学：生物材料

CiteScore

8.00

自引率

0.00%

发文量

审稿时长

3.5 months

期刊介绍： The Journal of Materials Science: Materials in Medicine publishes refereed papers providing significant progress in the application of biomaterials and tissue engineering constructs as medical or dental implants, prostheses and devices. Coverage spans a wide range of topics from basic science to clinical applications, around the theme of materials in medicine and dentistry. The central element is the development of synthetic and natural materials used in orthopaedic, maxillofacial, cardiovascular, neurological, ophthalmic and dental applications. Special biomedical topics include biomaterial synthesis and characterisation, biocompatibility studies, nanomedicine, tissue engineering constructs and cell substrates, regenerative medicine, computer modelling and other advanced experimental methodologies.