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Volume 11
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10.3390/coatings11050597
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Article

Microstructure and Corrosion Behavior of Ti-Nb Coatings on NiTi Substrate Fabricated by Laser Cladding

by
Jie Hu
1,
Yaojia Ren
1,
Qianli Huang
1,
Hao He
2,*,
Luxin Liang
1,
Jingbo Liu
1,
Ruidi Li
1 and
Hong Wu
1,*
1
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
2
Department of Vascular Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China
*
Authors to whom correspondence should be addressed.
Coatings 2021, 11(5), 597; https://doi.org/10.3390/coatings11050597
Submission received: 29 March 2021 / Revised: 11 May 2021 / Accepted: 12 May 2021 / Published: 19 May 2021
(This article belongs to the Special Issue The Applications of Laser Processing and Additive Manufacturing)
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Abstract

Ti-23Nb (at.%) coatings on an NiTi alloy with metallurgical bonding were prepared by laser cladding (LC) technology using Ti-Nb mixture powders. The effects of laser processing parameters on the microstructure and mechanical properties of the coatings were systematically investigated and the corrosion resistance of the coatings was assessed. The coatings were composed of TiNb, (Ti, Nb)2Ni, and β-Nb phases. The coatings increased the hardness of the NiTi alloy by a combined strengthening effect of the eutectics and fine microstructure. The corrosion resistance of the coated part was improved. The coatings with great corrosion resistance could keep the coated parts inert in an aggressive environment, and effectively restrain the release of toxic Ni ions, which means that the Ti-Nb alloy coatings are likely to be used as a biomaterial for medical applications.
Keywords: laser cladding; Ti-Nb alloy coating; NiTi(Nb) phase; microstructure; corrosion resistance laser cladding; Ti-Nb alloy coating; NiTi(Nb) phase; microstructure; corrosion resistance

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MDPI and ACS Style

Hu, J.; Ren, Y.; Huang, Q.; He, H.; Liang, L.; Liu, J.; Li, R.; Wu, H. Microstructure and Corrosion Behavior of Ti-Nb Coatings on NiTi Substrate Fabricated by Laser Cladding. Coatings 2021, 11, 597. https://doi.org/10.3390/coatings11050597

AMA Style

Hu J, Ren Y, Huang Q, He H, Liang L, Liu J, Li R, Wu H. Microstructure and Corrosion Behavior of Ti-Nb Coatings on NiTi Substrate Fabricated by Laser Cladding. Coatings. 2021; 11(5):597. https://doi.org/10.3390/coatings11050597

Chicago/Turabian Style

Hu, Jie, Yaojia Ren, Qianli Huang, Hao He, Luxin Liang, Jingbo Liu, Ruidi Li, and Hong Wu. 2021. "Microstructure and Corrosion Behavior of Ti-Nb Coatings on NiTi Substrate Fabricated by Laser Cladding" Coatings 11, no. 5: 597. https://doi.org/10.3390/coatings11050597

APA Style

Hu, J., Ren, Y., Huang, Q., He, H., Liang, L., Liu, J., Li, R., & Wu, H. (2021). Microstructure and Corrosion Behavior of Ti-Nb Coatings on NiTi Substrate Fabricated by Laser Cladding. Coatings, 11(5), 597. https://doi.org/10.3390/coatings11050597

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