Abstract
The aim of this work is to investigate the effect of BaFe12O19 nanoparticles on the microstructure, phase formation and mechanical properties of (Bi,Pb)-2223 superconducting phase. Co-precipitation and solid-state reaction techniques were used to synthesize BaFe12O19 nanoparticles and (BaFe12O19)x(Bi,Pb)-2223 superconducting samples with , respectively. BaFe12O19 nanoparticles and (BaFe12O19)x(Bi,Pb)-2223 structures were performed using X-ray diffraction. The morphology of BaFe12O19 nanoparticles and (BaFe12O19)x(Bi,Pb)-2223 were observed by means of transmission electron microscope (TEM) and scanning electron microscope (SEM), respectively. The experimental results reveal the composition of Bi-2223 phase and traces of Bi-2212 as a secondary phase when compared to the undadded sample. Lattice parameters are not altered with BaFe12O19 addition which indicate that nanoparticles do not enter the host crystal of (Bi,Pb)-2223. Vickers microhardness Hv is measured as function of indentation load and time. It was found that microhardness has a non-linear trend with applied load and time. The experimental results were analyzed using different models. The analysis revealed that the HK model was more suitable than the other approaches in estimating the load independent hardness of the samples.
Highlights
Bi2Sr2Can-1CunO2n+4+y ceramic superconductor (n=1,2 and 3) BSCCO, being characterized by its high superconducting transition temperature Tc and high critical current density Jc, is considered as an interesting material for technological applications (Celebi, Karaca, Ozturk, & Nezir, 1998) (Khalil, 2006)
BSCCO is often characterized by its poor mechanical performance; low ductility and elevated brittleness (Karaca, Uzun, Kolemen, Yilmaz, & Sahin, 2009)
The aim of this work is the enhancement of the mechanical properties, through Vickers microhardness meassurements, by the addition (x) of BaFe12O19 nanoparticles to (Bi,Pb)-2223 superconducting ceramics
Summary
Bi2Sr2Can-1CunO2n+4+y ceramic superconductor (n=1,2 and 3) BSCCO, being characterized by its high superconducting transition temperature Tc and high critical current density Jc, is considered as an interesting material for technological applications (Celebi, Karaca, Ozturk, & Nezir, 1998) (Khalil, 2006). BSCCO is often characterized by its poor mechanical performance; low ductility and elevated brittleness (voids, microcraks, grain and twin boundaries, nonstoichiometric oxygen content) (Karaca, Uzun, Kolemen, Yilmaz, & Sahin, 2009). For most applications, such materials take the form of wires and tapes. It was shown that the increase in the mechanical deformation provides high internal energy, which enhances the formation of Bi-2223 phase
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
