Researcher:
Aksoy, Cem Bahadır

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PhD Student

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Cem Bahadır

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Aksoy

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Aksoy, Cem Bahadır

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2018 - 20192

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Researcher Of Publications: search.filters.isAuthorOfPublication.65d75143-6f09-4786-a47a-920d5e21314c

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    Mechanical properties of titahfnbzr high-entropy alloy coatings deposited on niti shape memory alloy substrates
    (Springer, 2018) N/A; N/A; N/A; N/A; N/A; Department of Mechanical Engineering; Motallebzadeh, Amir; Yağcı, Mustafa Barış; Kılıç, Elif Bedir; Aksoy, Cem Bahadır; Canadinç, Demircan; Researcher; Researcher; PhD Student; PhD Student; Faculty Member; Department of Mechanical Engineering; Koç University Surface Science and Technology Center (KUYTAM) / Koç Üniversitesi Yüzey Teknolojileri Araştırmaları Merkezi (KUYTAM); N/A; N/A; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; N/A; N/A; 23433
    TiTaHfNbZr high-entropy alloy (HEa) thin films with thicknesses of about 750 and 1500 nm were deposited on NiTi substrates by RF magnetron sputtering using TiTaHfNbZr equimolar targets. the thorough experimental analysis on microstructure and mechanical properties of deposited films revealed that the TiTaHfNbZr films exhibited amorphous and cauliflower-like structure, where grain size and surface roughness increased concomitant with film thickness. More importantly, the current findings demonstrate that the TiTaHfNbZr HEa films with mechanical properties of the same order as those of the NiTi substrate constitute promising biomedical coatings effective in preventing Ni release.
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    Assessment of Ni ion release from TiTaHfNbZr high entropy alloy coated NiTi shape memory substrates in artificial saliva and gastric fluid
    (Elsevier Science Sa, 2019) Canadinç, D.; N/A; N/A; Aksoy, Cem Bahadır; Yağcı, Mustafa Barış; PhD Student; Researcher; Koç University Surface Science and Technology Center (KUYTAM) / Koç Üniversitesi Yüzey Teknolojileri Araştırmaları Merkezi (KUYTAM); Graduate School of Sciences and Engineering; N/A; N/A; N/A
    NiTi shape memory alloy substrates were coated with TiTaHfNbZr high entropy alloy (HEA) thin films by RF magnetron sputtering, and then immersed into artificial salvia (AS) and gastric fluid (GF) solutions in order to evaluate the effectiveness of the HEA coating in preventing Ni ion release from the substrates. The findings demonstrate that the TiTaHfNbZr HEA coating significantly restricts Ni ion release from NiTi even when subjected to two very acidic body fluids (AS and GF), warranting a thorough examination of this material for utility as coating material in NiTi based biomedical applications.