Effect of homovalent Bi/Ga substitution on propagations of flaws, dislocations and crack in Bi-2212 superconducting ceramics: Evaluation of new operable slip systems with substitution

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dc.authoridTURGAY, Tahsin/0000-0003-0304-1097
dc.contributor.authorTurkoz, M. B.
dc.contributor.authorZalaoglu, Y.
dc.contributor.authorTurgay, T.
dc.contributor.authorOzturk, O.
dc.contributor.authorYildirim, G.
dc.date.accessioned2024-09-29T15:55:06Z
dc.date.available2024-09-29T15:55:06Z
dc.date.issued2019
dc.departmentKarabük Üniversitesien_US
dc.description.abstractThis study defines a strong methodology between the mechanical performance behaviors and formation possible operable slip systems in the crystal structure of Bi-2212 superconducting phase with trivalent Bi/G substitution with the aid of Vickers hardness tests exerted at various indentation load intervals 0.245 N-2.940 N. It is found that the mechanical performance behaviors improve regularly with the increment in the trivalent Bi Ga partial substitution level up to the value of x = 0.05 due to the formation of new operable slip system. Namely, the optimum gallium (Ga) impurities serve as the strain fields and associated forces for the interaction of dislocations within the different orientations with each other to impose the surface residual compressive stresses orienting favorably the superconducting grains. Thus, the propagation of dislocations, flaws and cracks divert in the crystal structure. On this basis, the presence of optimum Ga impurity in the Bi-2212 crystal syster strengthens the mechanical strength, critical stress, resistance to the plastic deformation, stiffness and durabilit nature. Moreover, the experimental results advance in-depth understanding of fundamental links between th porosity and Young's moduli of elasticity founded on the impurity level and applied test loads. It is observed that in case of the optimum level of x = 0.05 the propagation of flaws, dislocations and cracks proceed along the transgranular regions instead of the intergranular regions as a consequence of improvement in the durabl tetragonal phase. On the other hand, the excess Ga content level in the polycrystalline Bi-2212 system results i the augmentation in the stress raisers, crack surface energy and crack-initiating flaws, activating the stress-induced phase transformation.en_US
dc.description.sponsorshipBolu Abant Izzet Baysz University Scientific Research Project Coordination Unit [2017.09.05.1217]en_US
dc.description.sponsorshipThis study is partially supported by Bolu Abant Izzet Baysz University Scientific Research Project Coordination Unit (Project No 2017.09.05.1217). Further, the corresponding author dedicates this study to his nephew, Ismail Okan Yildirim, on the occasion of his 7th Birthday.en_US
dc.identifier.doi10.1016/j.ceramint.2019.07.334
dc.identifier.endpage22919en_US
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.issue17en_US
dc.identifier.scopus2-s2.0-85072746720en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage22912en_US
dc.identifier.urihttps://doi.org/10.1016/j.ceramint.2019.07.334
dc.identifier.urihttps://hdl.handle.net/20.500.14619/4469
dc.identifier.volume45en_US
dc.identifier.wosWOS:000493217800062en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCeramics Internationalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBi-2212 superconducting phaseen_US
dc.subjectBi/Ga partial substitutionen_US
dc.subjectVickers hardness testsen_US
dc.subjectElasticityen_US
dc.subjectPorosityen_US
dc.subjectPropagationen_US
dc.titleEffect of homovalent Bi/Ga substitution on propagations of flaws, dislocations and crack in Bi-2212 superconducting ceramics: Evaluation of new operable slip systems with substitutionen_US
dc.typeArticleen_US

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