Homovalent Ho/Bi substitution effect on characteristic properties of Bi-2212 superconducting ceramics

Erdem, Ümit

doi:10.1007/s10854-021-07236-z

Cited by 10 publications

(2 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this context, the pure and Bi 2.0−x V x Sr 2.0 Ca 1.1 Cu 2.0 O y perovskite superconducting samples studied exhibit standard ISE behavior [48]. Therefore, every ceramic compound exhibits both reversible (elastic) and irreversible (plastic) deformations simultaneously throughout the crystal structure due to the predominant character of elastic recovery in the system [49]. In other words, if the applied forces are removed from the materials, the system recovers quickly without any signs of deformations under the test loads applied.…”

Section: Meyer's Law (Mk) Based Reviewmentioning

confidence: 94%

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

Ülgen¹,

Okur²,

Erdem³

et al. 2022

Phys. Scr.

Self Cite

View full text Add to dashboard Cite

This 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.

show abstract

Section: Meyer's Law (Mk) Based Reviewmentioning

confidence: 94%

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

Ülgen¹,

Okur²,

Erdem³

et al. 2022

Phys. Scr.

Self Cite

View full text Add to dashboard Cite

show abstract

“…On this basis, the Co surface-layered compounds prepared have exhibited the standard ISE behavior [34]. Namely, both reversible and irreversible deformations have proceeded simultaneously along the crystal structure as a result of the predominant character of elastic recovery [35]. In the case of remove of applied microindentation test loads from the workpiece surface, the Bi-2212 crystal system has recovered rapidly without plastic deformations.…”

Section: Examination Of Mechanical Characteristic Behaviors In Satura...mentioning

confidence: 97%

Change in transition balance between durable tetragonal phase and stress-induced phase of cobalt surface-layered in Bi-2212 materials by semi-empirical mechanical models

et al. 2023

Self Cite

View full text Add to dashboard Cite

This study has indicated the positive effect of sintering temperature on the mechanical durability, strength, critical stress, deformation degrees, durable tetragonal phase, failure and fracture by fatigue, and mechanical characteristic behavior to the applied test loads for the Co surface-layered Bi-2212 ceramic materials produced by the standard solid-state reaction method. The sintering mechanism has been used as the driving force for the penetration of cobalt ions in the Bi-2212 ceramic matrix. The microindentation hardness test measurements have been performed at the load intervals 0.245 N-2.940 N. The experimental findings have also been examined by the six different semi-empirical mechanical and indentation-induced cracking models. It has been found that all the mechanical performance parameters are improved considerably with increasing the diffusion sintering temperature up to 650°C. On this basis, the Co surface-layered Bi-2212 sample produced at the sintering temperature of 650°C has been observed to improve dramatically the mechanical durability and resistance to the applied test loads as a consequence of the formation of new force barrier regions, surface residual compressive stress regions, and slip systems in the Bi-2212 ceramic system. Similarly, the optimum sintering temperature has extensively enhanced the elastic recovery mechanism, critical stress values, and deformation degree levels, stored internal strain, and crack surface energy through the Bi-2212 ceramic materials. Accordingly, it has been noted that the best sample produced at 650°C is more hardly broken than the other ceramics. Namely, the optimum sintering temperature has decreased the sensitivity to the applied test loads as a result of delaying the beginning of the plateau limit regions. On the other hand, all the mechanism has been found to reverse completely depending on the excess sintering temperature. Lastly, the indentation-induced cracking model has been found to exhibit the closest results to the original Vickers microhardness parameters in the plateau limit regions.

show abstract

Refinement of some basic features of Zr surface-layered Bi-2223 superconductor with diffusion annealing temperature

Orhan

Kara

Kaya

et al. 2022

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Homovalent Ho/Bi substitution effect on characteristic properties of Bi-2212 superconducting ceramics

Cited by 10 publications

References 56 publications

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

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

Change in transition balance between durable tetragonal phase and stress-induced phase of cobalt surface-layered in Bi-2212 materials by semi-empirical mechanical models

Refinement of some basic features of Zr surface-layered Bi-2223 superconductor with diffusion annealing temperature

Contact Info

Product

Resources

About