用磷酸等离子体电解氧化处理的Ti-25Nb-25Ta合金

IF 0.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Materia-rio De Janeiro Pub Date : 2021-01-25 DOI:10.1590/S1517-707620210001.1233
Gregory Beilner, B. Pereira, C. M. Lepienski, G. B. Souza, E. S. Szameitat, N. Kuromoto, A. Claro, V. S. Sampaio, B. Chee, A. D. Luz, M. Nugent
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引用次数: 4

摘要

在无毒元素钛合金中,Ti-25Nb-25Ta合金具有良好的弹性性能、生物相容性和优异的耐腐蚀性。本研究旨在通过等离子体电解氧化(PEO)处理改善Ti-25Nb-25Ta合金的表面生物相容性。形成的氧化膜是无定形的,由两种不同的多孔结构组成:较小的孔洞状孔隙和较大的火山状孔隙。在孔洞形成较小的区域和孔洞形状中,化学元素磷的原子百分率最高。纳米压痕测试表明,Ti-25Nb-25Ta合金的硬度略低于商业纯2级钛(作为参考材料),而Ti-25Nb-25Ta的弹性模量测量值更适合植入应用(与参考钛相比值更低)。PEO处理后,在骨组织中应用有明显的机械表面改善(表面硬度增加,弹性模量降低)。尽管Ti-25Nb-25Ta合金在硬质生物组织中具有优异的应用性能,但PEO处理能更好地发挥其性能。关键词:钛合金,Ti-25Nb-25Ta,纳米压痕,力学性能,等离子电解氧化
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Ti-25Nb-25Ta alloy treated by plasma electrolytic oxidation in phosphoric acid for implant applications
Among titanium alloys with non-toxic elements, the Ti-25Nb-25Ta alloy has good elastic behavior for applications in osseous implants, biocompatibility, and excellent corrosion resistance. The present study aimed to better the biocompatibility characteristics of Ti-25Nb-25Ta alloy modifying its surface through Plasma Electrolytic Oxidation (PEO) treatment. The formed oxide coating is amorphous and composed of two distinct porous formations: smaller hole-shaped pores and larger volcano-like pores. The regions with the formation of smaller pores and in the hole shaped presented the highest atomic percentage of the chemical element phosphorus. Nanoindentation tests have shown that the hardness of the Ti-25Nb-25Ta alloy is slightly lower than the commercially pure grade 2 titanium (a material used as reference), while elastic modulus measurements of Ti-25Nb-25Ta presented more suitable values for implant application (lower values when compared with titanium reference). After PEO treatment there were significant mechanical surface improvements (increased fairly surface hardness and decreased elastic modulus) for application in osseous tissue. Despite the Ti-25Nb-25Ta alloy presented excellent characteristics for applications in hard biological tissues, the PEO treatment better its features. Keywords: Titanium alloy, Ti-25Nb-25Ta, nanoindentation, mechanical properties, Plasma Electrolytic Oxidation.
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来源期刊
Materia-rio De Janeiro
Materia-rio De Janeiro MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
1.00
自引率
25.00%
发文量
51
审稿时长
6 weeks
期刊介绍: All the articles are submitted to a careful peer-reviewing evaluation process by the journal''s Editorial Board. The Editorial Board, reviewers and authors make use of a web based proprietary automated tool to deal with the reviewing procedures.the Revista Matéria''s article reviewing restricted access system - SEER. Authors are not informed about the identity of the reviewers.
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