Evaluation of load-independent microhardness values in Plateau regions of Vanadium substituted Bi-2212 ceramics

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dc.authorid0000-0002-7112-5607en_US
dc.authorid0000-0002-0480-8176en_US
dc.authorid0000-0001-8058-1690en_US
dc.authorid0000-0003-0304-1097en_US
dc.authorid0000-0002-5177-3703en_US
dc.contributor.authorÜlgen, Asaf Tolga
dc.contributor.authorOkur, Semih
dc.contributor.authorErdem, Ümit
dc.contributor.authorPakdil, Murat
dc.contributor.authorTurgay, Tahsin
dc.contributor.authorYıldırım, Gürcan
dc.date.accessioned2023-08-16T08:02:30Z
dc.date.available2023-08-16T08:02:30Z
dc.date.issued2022en_US
dc.departmentBAİBÜ, Fen Bilimleri Enstitüsü, Makine Mühendisliği Ana Bilim Dalıen_US
dc.descriptionThis study is partially supported by Bolu Abant Izzet Baysal University Scientific Research Project Coordination Unit (Project No: 2016.09.05.999).en_US
dc.description.abstractThis study reveals extensively effect of homovalent V/Bi partial replacement in Bi2.0-xVxSr2.0Ca1.1Cu2.0Oy ceramic matrix (0.00 <= x <= 0.30) on the key mechanical design performance parameters and load-independent Vickers microhardness parameters in plateau limit region by means of experimental microhardness tests and semi-empiric approaching models. It is found that the vanadium substitution level of x = 0.01 is observed to be optimum amount in the Bi-2212 crystal lattice for refinement of fundamental mechanical properties due to the enhancement in stabilization of durable tetragonal phase, surface residual compressive stress and elastic recovery mechanism. Conversely, from the replacement level of x = 0.01 onwards, the lattice strain field and stress concentration sites enhance significantly depending on the increase of microscopic structural problems, interaction problems between adjacent layers and crack-initiating flaws in Bi-2212 ceramic system. Correspondingly, stress-induced phase transformation begins to play predominant role, and excess vanadium substituted ceramic materials are easily broken at relatively smaller test load. Moreover, the models indicate that every ceramic compound shows standard indentation size effect (ISE) feature due to predominant behavior of elastic recovery in crystal structure. Hence, presence of optimum vanadium ions strengthens typical ISE characteristic behavior. Furthermore, among semi-empirical models the indentation-induced cracking (IIC) model exhibits the highest performance to inspect real microhardness values of Bi2.0-xVxSr2.0Ca1.1Cu2.0Oy ceramic compounds in the plateau limit region.en_US
dc.description.sponsorshipBolu Abant Izzet Baysal University Scientific Research Project Coordination Unit [2016.09.05.999]en_US
dc.identifier.citationUlgen, A. T., Okur, S., Erdem, U., Pakdil, M., Turgay, T., & Yildirim, G. (2022). Evaluation of load-independent microhardness values in Plateau regions of Vanadium substituted Bi-2212 ceramics. Physica Scripta, 97(8), 085703.en_US
dc.identifier.doi10.1088/1402-4896/ac7e00
dc.identifier.endpage19en_US
dc.identifier.issn0031-8949
dc.identifier.issn1402-4896
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-85134778493en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage1en_US
dc.identifier.urihttp://dx.doi.org/10.1088/1402-4896/ac7e00
dc.identifier.urihttps://hdl.handle.net/20.500.12491/11540
dc.identifier.volume97en_US
dc.identifier.wosWOS:000822910800001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOkur, Semih
dc.institutionauthorPakdil, Murat
dc.institutionauthorYıldırım, Gürcan
dc.language.isoenen_US
dc.publisherIOP Publishing Ltden_US
dc.relation.ispartofPhysica Scriptaen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - İdari Personel ve Öğrencien_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBi-2212 Ceramic Materialen_US
dc.subjectHomovalent Substitutionen_US
dc.subjectElastic Recoveryen_US
dc.subjectHigh-Pressure Synthesisen_US
dc.subjectMechanical-Propertiesen_US
dc.subjectSuperconductoren_US
dc.titleEvaluation of load-independent microhardness values in Plateau regions of Vanadium substituted Bi-2212 ceramicsen_US
dc.typeArticleen_US

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