Improvement of the Nature of Indentation Size Effect of Bi-2212 Superconducting Matrix by Doped Nd Inclusion and Theoretical Modeling of New Matrix

Öztürk, O.; Asikuzun, E.; Kaya, S.; Turkoz, Mustafa; Kılıç, Ahmet

doi:10.1007/s10948-014-2477-4

Cited by 11 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, from the XRD study, a and c lattice parameters for HA are determined with the help of the device library and presented in Table 2. While a and c lattice parameters increased with the augmentation of La value, no notable change is observed in the a and c lattice parameters with the addition of F. According to the table, while the a‐ and c‐ axis lengths were found to increase with the augmentation of La concentration level, no notable change is observed in the a and c lattice cell parameters with the addition of F. This may be attributed to the fact that the fundamental physical and chemical properties such as new bonding formation between host atoms, atomic occupancy, magnetic moment magnitude, ionic radius size, chemical valence state, and electron configurations of outermost orbital shell of La atoms (partial substituted by Ca atoms) are totally different from those of F atoms (partially substituted by P atoms; Ozturk et al, 2014; Zalaoglu et al, 2013). In more detail, for the inner substitution mechanism (much more affecting the a‐ and c‐ axis lengths) the Ca atom possesses the outer atomic electron configuration of 4s 2 whereas the La atom presents the outer electron configuration of 5d 1 6s 2 .…”

Section: Resultsmentioning

confidence: 99%

“…figurations of outermost orbital shell of La atoms (partial substituted by Ca atoms) are totally different from those of F atoms (partially substituted by P atoms;Ozturk et al, 2014;Zalaoglu et al, 2013). In more detail, for the inner substitution mechanism (much more affecting the a-and c-axis lengths) the Ca atom possesses the outer atomic electron configuration of 4s 2 whereas the La atom presents the outer electron configuration of 5d 1 6s 2 .…”

mentioning

confidence: 93%

See 1 more Smart Citation

La³⁺and F⁻dual‐doped multifunctional hydroxyapatite nanoparticles: Synthesis and characterization

Erdem

Turkoz

2021

Microscopy Res & Technique

View full text Add to dashboard Cite

Hydroxyapatite (HA) co-doped with La 3+ and F À ions were synthesized by the precipitation method and sintered at 1,100 C for 1 hr. Samples were characterized by the standard experimental methods including the density, X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM) to investigate their microstructure, phase formation, and bonding characteristics in detail. Moreover, the materials produced were identified using the microhardness tests. It was observed that in the most of materials, the hydroxyapatite was found to be the main phase with a minor amount of β-tricalcium phosphate (β-TCP).Furthermore, the presence of fluoride and small amount of β-TCP was verified with all the characteristic FTIR bands of hydroxyapatite for the majority of samples studied. The result in SEM evaluation is that the produced HA powders have less deformed, uniformly distributed, and regularly shaped particles. Here, the material density has changed towards a less dense state with the increasing rate of La doping, but statistically significant difference was not obtained (p, .1942 > .05) with increase

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 93%

La³⁺and F⁻dual‐doped multifunctional hydroxyapatite nanoparticles: Synthesis and characterization

Erdem

Turkoz

2021

Microscopy Res & Technique

View full text Add to dashboard Cite

show abstract

“…In Table 6, the values of W HK , A 1HK and the H HK values are tabulated. The values of W HK are positive for all samples which can be interpreted as the applied load is enough to create both the elastic and plastic deformation [41,42]. Among these models, the values of microhardness calculated using HK model are the closest to the values of the plateau (saturation) region (Table 7).…”

Section: Hays-kendall (Hk) Approachmentioning

confidence: 88%

Preparation, structural and micromechanical properties of (Al/Mg) co-doped ZnO nanoparticles by sol–gel process

Asikuzun

Öztürk

Arda

et al. 2015

J Mater Sci: Mater Electron

Self Cite

View full text Add to dashboard Cite

Zn 0.90 Mg 0.10-x Al x O (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5 and 0.10) nanoparticles were prepared by using sol-gel technique. The effects of Al and Mg doping on the structural and mechanical properties were investigated by using X-Ray diffraction (XRD), scanning electron microscopy (SEM) and digital micro-hardness tester, respectively. The grain size, a and c lattice parameters and morphology of nanoparticles were characterized by XRD and SEM measurements. The grain sizes of Al/Mg co-doped ZnO nanoparticles were also calculated by Scherrer-Warren equation. a and c lattice parameters are calculated from XRD peaks. According to the results it was observed that the grain sizes increased with increasing the Al doping. c lattice parameter partially decreased with Al doping. The experimental results of hardness measurements were analyzed using Meyer's law, proportional specimen resistance model, elastic/plastic deformation model, and Hays-Kendall (HK) approach. It was observed that HK approach is the most successful model for the micro-hardness analysis of Al/Mg co-doped ZnO materials.

show abstract

“…Some reports [61] states that the smaller n value indicates that the size effect becomes more dominant and the strain gradient increases due to the formation of a large population of sessile dislocations. Likewise, the approximate decrease in n values from 1.48 for the pure sample to 1.27 for x = 0.10 implies that the samples exhibit more ISE behavior with increasing Er-doping content [63]. On the other hand, Meyer's index is also related to the lattice perfection, with larger value signifying larger lattice damage [64].…”

Section: Analyses and Modelingmentioning

confidence: 98%

Vickers microhardness and indentation creep studies for erbium-doped ZnO nanoparticles

2019

View full text Add to dashboard Cite

The effect of erbium (Er) doping on the structural, magnetic and mechanical properties of Zn 1−x Er x O, with 0.00 ≤ x ≤ 0.10, samples was studied using X-ray powder diffraction, M-H magnetic hysteresis and digital Vickers microhardness tester, respectively. The samples were prepared by wet chemical co-precipitation method. Vickers microhardness (H v) measurements were carried out at different applied loads (0.25-10 N) and dwell times (t = 10-60 s) to study the mechanical performance of the samples. Experimental results of H v were analyzed using Meyer's law, and modeled according to Hays-Kendall, elastic/plastic deformation, modified proportional specimen resistance (MPSR) and Indentation Induced Cracking models. It was observed that the MPSR model was the most appropriate model for describing the load independent microhardness data of Er-doped ZnO nanoparticle samples. Indentation creep behavior of Zn 1−x Er x O samples was studied at room temperature by measuring the variation of H v with the dwell times (t = 10-60 s) at fixed applied loads F = 1, 5 and 10 N, respectively. The results showed that Er-doped ZnO nanoparticles samples possessed grain boundary sliding and dislocation climbs at low loads followed by dislocation creep for higher loads within the operative creep mechanism.

show abstract

Improvement of the Nature of Indentation Size Effect of Bi-2212 Superconducting Matrix by Doped Nd Inclusion and Theoretical Modeling of New Matrix

Cited by 11 publications

References 39 publications

La³⁺and F⁻dual‐doped multifunctional hydroxyapatite nanoparticles: Synthesis and characterization

La³⁺and F⁻dual‐doped multifunctional hydroxyapatite nanoparticles: Synthesis and characterization

Preparation, structural and micromechanical properties of (Al/Mg) co-doped ZnO nanoparticles by sol–gel process

Vickers microhardness and indentation creep studies for erbium-doped ZnO nanoparticles

Contact Info

Product

Resources

About

Improvement of the Nature of Indentation Size Effect of Bi-2212 Superconducting Matrix by Doped Nd Inclusion and Theoretical Modeling of New Matrix

Cited by 11 publications

References 39 publications

La3+and F−dual‐doped multifunctional hydroxyapatite nanoparticles: Synthesis and characterization

La3+and F−dual‐doped multifunctional hydroxyapatite nanoparticles: Synthesis and characterization

Preparation, structural and micromechanical properties of (Al/Mg) co-doped ZnO nanoparticles by sol–gel process

Vickers microhardness and indentation creep studies for erbium-doped ZnO nanoparticles

Contact Info

Product

Resources

About

La³⁺and F⁻dual‐doped multifunctional hydroxyapatite nanoparticles: Synthesis and characterization

La³⁺and F⁻dual‐doped multifunctional hydroxyapatite nanoparticles: Synthesis and characterization