Publication:
Biocorrosion behavior TiTaNbZrMo high-entropy alloy thin films sputtered on NiTi shape memory alloy substrates with controlled microstructure

dc.contributor.departmentDepartment of Mechanical Engineering
dc.contributor.departmentKUYTAM (Koç University Surface Science and Technology Center)
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.kuauthorHosseinjany, Azizeh
dc.contributor.kuauthorCanadinç, Demircan
dc.contributor.kuauthorYağcı, Mustafa Barış
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2024-12-29T09:41:26Z
dc.date.issued2024
dc.description.abstractThis paper presents the experimental findings on the effect of deposition conditions on the microstructure of the corrosion-resistant TiTaNbZrMo high entropy alloy (HEA) thin films deposited on NiTi substrates with the purpose of enhancing biocompatibility of the NiTi shape memory alloy (SMA). For this purpose, RF magnetron sputtering was employed to fabricate TiTaNbZrMo HEA films with 750 nm and 1500 nm thicknesses. Static immersion experiments were conducted in simulated body fluid (SBF) and artificial saliva (AS) solutions for 1, 14, and 28 days to establish the relationship between Ni ion release and deposition parameters. The results revealed that thin films grown under low working pressure exhibited crystalline body-centered cubic (BCC) microstructure with a highly dense, compact, and crack-free structure, while those deposited under high-pressure conditions exhibited an amorphous structure with inherent cracks. The biocorrosion test results indicated that the dense and compact thin film fulfilled the expected corrosion resistance requirements for prolonged utility in human body. Moreover, the HEA films revealed an outstanding amount of hydroxyapatite (HAp) formation, indicating remarkable bioactivity and favorable bone-bonding capabilities. The findings suggest that the HEA films deposited under low working pressures could constitute promising alternatives to conventional coatings on NiTi SMAs.
dc.description.indexedbyWoS
dc.description.indexedbyScopus
dc.description.openaccessN/A
dc.description.publisherscopeInternational
dc.description.sponsorsThe authors acknowledge the use of the services and facilities of n2 STAR-Ko\u00E7 University Nanofabrication and Nanocharacterization Center for Scientific and Technological Advanced Research, and Koc University Surface Science and Technology Center (KUYTAM). The authors also express their gratitude to Dr. Gulsu Simsek for her help with the ICP-MS analyses, Dr. Hadi Jahangiri for his assistance with XRD measurements, and Dr. Amir Motallebzadeh for his support with AFM measurements conducted at the Koc University Surface Science and Technology Center (KUYTAM). The authors acknowledge Dr. Seckin Akinci and Dr. Aziz Koyuncuo\u011Flu of n2 STAR-Ko\u00E7 University Nanofabrication and Nanocharacterization Center for Scientific and Technological Advanced Research for their assistance in metal deposition machine setting.
dc.description.volume661
dc.identifier.doi10.1016/j.apsusc.2024.160038
dc.identifier.eissn1873-5584
dc.identifier.issn0169-4332
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-85189941703
dc.identifier.urihttps://doi.org/10.1016/j.apsusc.2024.160038
dc.identifier.urihttps://hdl.handle.net/20.500.14288/23642
dc.identifier.wos1227968300001
dc.keywordsCoating
dc.keywordsCorrosion
dc.keywordsHigh entropy alloy
dc.keywordsMagnetron sputtering
dc.keywordsShape memory alloy
dc.languageen
dc.publisherElsevier B.V.
dc.relation.grantnoKoc University Surface Science and Technology Center
dc.relation.grantnoKUYTAM
dc.sourceApplied Surface Science
dc.subjectMechanical Engineering
dc.titleBiocorrosion behavior TiTaNbZrMo high-entropy alloy thin films sputtered on NiTi shape memory alloy substrates with controlled microstructure
dc.typeJournal article
dspace.entity.typePublication
local.contributor.kuauthorHosseinjany, Azizeh
local.contributor.kuauthorCanadinç, Demircan
local.contributor.kuauthorYağcı, Mustafa Barış
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Engineering
local.publication.orgunit1Research Center
local.publication.orgunit2Department of Mechanical Engineering
local.publication.orgunit2KUYTAM (Koç University Surface Science and Technology Center)
local.publication.orgunit2Graduate School of Sciences and Engineering
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