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Improvement of Indentation Size Effect of Bi 2212 Superconducting Matrix by Doped Nd Inclusion and Theoretical Modeling of New Matrix     
Yazarlar
Prof. Dr. Özgür ÖZTÜRK
Kastamonu Üniversitesi, Türkiye
Doç. Dr. Elif AŞIKUZUN TOKEŞER
Kastamonu Üniversitesi, Türkiye
Öğr. Gör. Şeydanur KAYA
Kastamonu Üniversitesi, Türkiye
Gürcan Yıldırım
Abant İzzet Baysal Üniversitesi, Türkiye
Mustafa Burak Türköz
Karabük Üniversitesi, Türkiye
Ahmet Kılıç
Ankara Üniversitesi, Türkiye
Özet
Neodmium (Nd) inclusions at different stoichiometric ratios (x=0.0, 0.001 %, 0.005 %, 0.01 %, 0.05 %, 0.1 %) are doped in the Bi-2212 superconducting samples and the samples obtained are subjected to the sintering process at 840 °C constant temperature for 72 hours. The effect of Nd doping on the structural and mechanical properties of prepared samples is investigated by the standard characterization measurements. XRD and SEM measurements are performed to obtain information about surface morphology, phase ratios, lattice parameters and particle size. Moreover, Vickers microhardness (H V ) measurements are exerted to investigate the mechanical properties of the all samples in detail. It is found that all the properties given above retrogress with the increase of the Nd concentration in the Bi-2212 superconducting core. However, the ISE nature of the materials improves systematically. Additionally, the experimental results of microhardness measurements are analyzed using Meyer's law, PSR, MPSR, EPD models and HK approach. The results show that Hays-Kendall approach is determined as the most successful model. © 2014 Springer Science+Business Media New York.
Anahtar Kelimeler
XRD,SEM,Meyer's law,HK approach,ISE
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Journal of Superconductivity and Novel Magnetism
Dergi ISSN 1557-1939
Dergi Tarandığı Indeksler SCI
Makale Dili İngilizce
Basım Tarihi 06-2014
Cilt No 27
Sayı 6
Sayfalar 1403 / 1412
Doi Numarası 10.1007/s10948-014-2477-4
Makale Linki http://link.springer.com/10.1007/s10948-014-2477-4