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结合冷喷涂和高速悬浮火焰喷涂制备的锌/羟基磷灰石多层涂层的微观结构与腐蚀行为

Microstructure and Corrosion Behavior of Zinc/Hydroxyapatite Multi-Layer Coating Prepared by Combining Cold Spraying and High-Velocity Suspension Flame Spraying.

作者信息

Yao Hailong, Hu Xiaozhen, Chen Qingyu, Wang Hongtao, Bai Xiaobo

机构信息

Jiangxi Province Engineering Research Center of Materials Surface Enhancing & Remanufacturing, School of Materials Science and Engineering, Jiujiang University, Jiujiang 332005, China.

School of Architecture Engineering and Planning, Jiujiang University, Jiujiang 332005, China.

出版信息

Materials (Basel). 2023 Oct 20;16(20):6782. doi: 10.3390/ma16206782.

DOI:10.3390/ma16206782
PMID:37895763
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10608217/
Abstract

The study aims to enhance the corrosion resistance and bioactivity of Mg alloy substrates through the development of a zinc/hydroxyapatite multi-layer (Zn/HA-ML) coating. The Zn/HA-ML coating was prepared by depositing a cold-sprayed (CS) Zn underlayer and a high-velocity suspension flame sprayed (HVSFS) Zn/HA multi-layer and was compared with the CS Zn coating and the Zn/HA dual-layer (Zn/HA-DL) coating. Phase, microstructure, and bonding strength were examined, respectively, by X-ray diffraction, scanning electron microscopy, and tensile bonding testing. Corrosion behavior and bioactivity were investigated using potentiodynamic polarization, electrochemical impedance spectroscopy, and immersion testing. Results show that the HVSFS Zn/HA composite layers were mainly composed of Zn, HA, and ZnO and were well bonded to the substrate. The HVSFS HA upper layer on the CS Zn underlayer in the Zn/HA-DL coating exhibited microcracks due to their mismatched thermal expansion coefficient (CTE). The Zn/HA-ML coating exhibited good bonding within different layers and showed a higher bonding strength of 27.3 ± 2.3 MPa than the Zn/HA-DL coating of 20.4 ± 2.7 MPa. The CS Zn coating, Zn/HA-DL coating, and Zn/HA-ML coating decreased the corrosion current density of the Mg alloy substrate by around two-fourfold from 3.12 ± 0.75 mA/cm to 1.41 ± 0.82mA/cm, 1.06 ± 0.31 mA/cm, and 0.88 ± 0.27 mA/cm, respectively. The Zn/HA-ML coating showed a sixfold decrease in the corrosion current density and more improvements in the corrosion resistance by twofold after an immersion time of 14 days, which was mainly attributed to newly formed apatite and corrosion by-products of Zn particles. The Zn/HA-ML coating effectively combined the advantages of the corrosion resistance of CS Zn underlayer and the bioactivity of HVSFS Zn/HA multi-layers, which proposed a low-temperature strategy for improving corrosion resistance and bioactivity for implant metals.

摘要

该研究旨在通过开发锌/羟基磷灰石多层（Zn/HA-ML）涂层来提高镁合金基体的耐腐蚀性和生物活性。Zn/HA-ML涂层是通过沉积冷喷涂（CS）锌底层和高速悬浮火焰喷涂（HVSFS）锌/羟基磷灰石多层制备的，并与CS锌涂层和锌/羟基磷灰石双层（Zn/HA-DL）涂层进行了比较。分别通过X射线衍射、扫描电子显微镜和拉伸粘结试验对相、微观结构和粘结强度进行了检测。使用动电位极化、电化学阻抗谱和浸泡试验研究了腐蚀行为和生物活性。结果表明，HVSFS锌/羟基磷灰石复合层主要由锌、羟基磷灰石和氧化锌组成，并且与基体结合良好。由于热膨胀系数（CTE）不匹配，Zn/HA-DL涂层中CS锌底层上的HVSFS羟基磷灰石上层出现了微裂纹。Zn/HA-ML涂层在不同层之间表现出良好的结合，并且显示出比Zn/HA-DL涂层（20.4±2.7MPa）更高的粘结强度，为27.3±2.3MPa。CS锌涂层、Zn/HA-DL涂层和Zn/HA-ML涂层分别使镁合金基体的腐蚀电流密度从3.12±0.75mA/cm²降低了约两倍至四倍，分别降至1.41±0.82mA/cm²、1.06±0.31mA/cm²和0.88±0.27mA/cm²。在浸泡14天后，Zn/HA-ML涂层的腐蚀电流密度降低了六倍，耐腐蚀性提高了两倍，这主要归因于新形成的磷灰石和锌颗粒的腐蚀产物。Zn/HA-ML涂层有效地结合了CS锌底层的耐腐蚀性和HVSFS锌/羟基磷灰石多层的生物活性优势，为提高植入金属的耐腐蚀性和生物活性提出了一种低温策略。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/1f3ff2339811/materials-16-06782-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/e63c2b31c3b6/materials-16-06782-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/8ac8f5e0926b/materials-16-06782-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/1f3ff2339811/materials-16-06782-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/d546df9d37c1/materials-16-06782-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/799532070c84/materials-16-06782-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/7a84c364c805/materials-16-06782-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/eb6e9166eb6a/materials-16-06782-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/5327fef89844/materials-16-06782-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/0945f8fe90fe/materials-16-06782-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/e63c2b31c3b6/materials-16-06782-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/8ac8f5e0926b/materials-16-06782-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e97/10608217/1f3ff2339811/materials-16-06782-g009.jpg

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