Enhanced mechanical properties of yttrium doped ZnO nanoparticles as determined by instrumented indentation technique

Kaya, S.; Akcan, D.; Öztürk, O.; Arda, L.

doi:10.1016/j.ceramint.2018.03.038

Cited by 24 publications

(11 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Consequently, hardness of the composites has been determined be dependent of the applied load, Figure 6. Similar observation has been presented in the literature, where it has been indicated that the increase in hardness with the applied load is called the reverse indentation size effect [23].…”

Section: Resultssupporting

confidence: 84%

Production and characterization of boron carbide and silicon carbide reinforced copper‐nickel composites by powder metallurgy method

Akkaş

2021

Materialwissenschaft Werkst

View full text Add to dashboard Cite

In this study, composite samples were produced by reinforcing boron carbide and silicon carbide particles in different rates by weight into copper‐nickel powder mixture using powder metallurgy method. The prepared powder mixtures were cold pressed under 600 MPa pressure and pelletized. The pelletized samples were then sintered in an atmosphere‐controlled furnace. Scanning electron microscopy to determine the microstructure of the produced samples and x‐ray diffraction method analysis to determine the phases forming in the structure of the produced samples were used and microhardness was taken to determine the effect of boron carbide and silicon carbide on hardness. In addition to that, the mechanical properties the transverse rupture strength were investigated using three‐point bending tests. The corrosion tests were performed potentiodynamic polarization curves of the samples in 3.5 % sodium chloride solution. The highest hardness value was measured as 162 HV 0.05 in the sample reinforced with 10 % boron carbide. As the amount of silicon carbide increased, the corrosion resistance of the composite increased. Moreover, as the amount of boron carbide increased, the corrosion resistance of the composite decreased. Load‐contact depth values were examined, copper‐nickel+10 % silicon carbide has the highest peak depth of 48.12.

show abstract

Section: Resultssupporting

confidence: 84%

Production and characterization of boron carbide and silicon carbide reinforced copper‐nickel composites by powder metallurgy method

Akkaş

2021

Materialwissenschaft Werkst

View full text Add to dashboard Cite

show abstract

“…ZnO is considered to be relatively 'soft' material compared to other ceramics [40] and the hardness values of ZnO vary between 0.0105 GPa and 6 GPa as reported by Kaya et al [41] and Keyan et al [42], respectively. The hardness of our synthesized Zn 1−x Sm x O nanoparticles is equal to 0.845 GPa for x=0.00 which lies in the above-mentioned range.…”

Section: Vickers Microhardness Measurementsmentioning

confidence: 99%

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

Badreddine

Srour

Awad

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

Zn1−xSmxO nanoparticles, with 0.00 ≤ x ≤ 0.10, were prepared using chemical co-precipitation method. The structure and morphology of the obtained samples were characterized using x-ray powder diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. However, the mechanical properties were investigated via digital Vickers microhardness tester. Vickers microhardness measurements were carried out at different applied loads, varying between 0.5 and 10 N at dwell time 60 s on pressed discs of average thickness 3 mm. Hv decreased as the Sm-content increased up to 0.02 and then it increased for higher concentrations. Whereas, it increased as the applied load increased, revealing that the samples exhibited a reverse indentation size effect (ISE). The microhardness measurements were interpreted using various models such as Meyer’s law, Hays and Kendall (HK) approach, elastic/plastic deformation (EPD), proportional specimen resistance (PSR) and the indentation-induced cracking (IIC). Mechanical parameters such as Young’s modulus (E), yield strength (Y), fracture toughness (K) and brittleness index (B) were calculated as a function of x. The most adequate model for the true microhardness of these samples is IIC. It was found that the addition of Sm content enhanced the mechanical properties of the prepared samples after x = 0.02. Dielectric measurements were used to compute different parameters such as real and imaginary parts of the complex permittivity, dielectric loss (tan δ) and ac conductivity (σ ac).

show abstract

“…( ) ℎυ = k(hυ − ) 1/2 (2) Also, Eq 2. could be written ( ( ) ℎυ) 2 = 2 (hυ − ). The band gap energies are calculated by the slope of the graph of ( ( ) ℎυ) 2…”

Section: Band Gap Calculationmentioning

confidence: 99%

Structure, microstructure and optical properties of Tb doped ZnO nanorods

Güler

2020

International Journal of Advances in Engineering and Pure Sciences

View full text Add to dashboard Cite

The rare-earth-doped Zinc Oxides (ZnO) are significant materials, especially in photodetector technology, for high detection and high-speed optical communication. Here, important physical properties of Terbium-doped ZnO synthesized by the hydrothermal method were analyzed based on their concentration dependence. Structural behaviors of the nanorods were identified by the X-ray diffraction (XRD) technique and were figured out that Zn1-xTbxO samples were hexagonal Wurtzite structure with no secondary phase. The results of the structural behaviors were also proved by Rietveld analysis. The effect of Tb element in Zn1-xTbxO composition was clarified by calculating lattice parameters and cell volumes. To define the system better, microstructural parameters were provided by calculation. Scanning Electron Microscope images revealed random agglomeration. Due to the small amount of Tb increment in Zn1-xTbxO set, the desired elemental composition results were obtained in the nanorod sets (from x=0 to x=0.05 with the increment x rate of 0.01). By plotting (() ℎυ) 2 versus hʋ, the bandgap energies of Zn1-xTbxO structures were determined, and the variation of Eg energies with increasing Tb dopant in the structures were discussed.

show abstract

Enhanced mechanical properties of yttrium doped ZnO nanoparticles as determined by instrumented indentation technique

Cited by 24 publications

References 58 publications

Production and characterization of boron carbide and silicon carbide reinforced copper‐nickel composites by powder metallurgy method

Production and characterization of boron carbide and silicon carbide reinforced copper‐nickel composites by powder metallurgy method

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

Structure, microstructure and optical properties of Tb doped ZnO nanorods

Contact Info

Product

Resources

About