An investigation of equibiaxial flexural strength and hardness properties of Al2O3–Ni nanocomposites based microstructures with ZrO2 and Cr2O3 additives

Yıldız, Betül Kafkaslıoğlu; Tür, Yahya Kemal

doi:10.1016/j.msea.2019.05.014

Cited by 13 publications

(9 citation statements)

References 37 publications

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“…So, compared to the previous study, the sintered relative density of the samples: A increased from 95.7 to 97.6, AN from 92.8 to 95.3, AC from 96.7 to 97.8, ANZ from 97.7 to 98.6 and ANC from 94.8 to 96.3, without changing the sintering conditions. On the other hand, there was no significant difference in the green density values compared to the samples in the previous study[21] and again 56-60% values were obtained.X-ray diffraction patterns of all compositions after pressureless sintering are shown in Fig.2. In the ZrO 2 containing composites in addition to dominant α-Al 2 O 3 , tetragonal ZrO 2 phase was confirmed by the presence of a high-intensity peak at 30.16°and additional peaks at 50.11°and 59.22°.…”

supporting

confidence: 41%

“…3 to compare the hardness values of all compositions from both previous and the present work and to analyse the effect of additives on hardness. In the previous study [21] the higher hardness value of the AZ composites was attributed to its better densification compared to the pure Al 2 O 3 . In the present study, the A and AZ samples have similar hardness values since the difference in density is quite small and their hardness values follow the empirical equation (Fig.…”

Section: Hardnessmentioning

confidence: 88%

“…In addition to hardness measurements, equibiaxial flexu-ral tests were conducted for strength measurements and the stored energy at failure was estimated by using the theoretical deflection of the cylindrical plate and total crack lengths were measured after failure. The possible fragmentation behaviour of each composition was observed, and the ballistic performance of the ceramics was evaluated through the quasi-static tests (elastic modulus, hardness, flexural strength) [21]. In the current study, hardness measurements of the samples, which are produced thicker (∼4 mm) than in the previous study (∼2 mm), were made and re-examined.…”

Section: Introductionmentioning

confidence: 98%

“…The Vickers hardness (H), green (ρ 0 ) and sintered density (ρ s ) values of the produced specimensFigure 2. XRD results of the composites prepared with Al 2 O 3 , Ni, ZrO 2 and Cr 2 O 3 after pressureless sinteringin our previous work[21]. So, compared to the previous study, the sintered relative density of the samples: A increased from 95.7 to 97.6, AN from 92.8 to 95.3, AC from 96.7 to 97.8, ANZ from 97.7 to 98.6 and ANC from 94.8 to 96.3, without changing the sintering conditions.…”

mentioning

confidence: 94%

“…In the current study, hardness measurements of the samples, which are produced thicker (∼4 mm) than in the previous study (∼2 mm), were made and re-examined. Addi The samples were prepared under the same conditions as the specimens produced for the quasi-static mechanical tests in our previous study [21]. The heterogeneous precipitation method was used to obtain nanosized metal particles in the ceramic matrix for the Nicontaining composites.…”

Section: Introductionmentioning

confidence: 99%

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Low velocity drop weight impact behaviour of Al2O3-Ni-ZrO2 and Al2O3-Ni-Cr2O3 ceramic composites

Kafkaslıoğlu

Buyuk

Tür

2021

PAC

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Particulate Al2O3 matrix nanocomposites containing 1 vol.%Ni were prepared by the heterogeneous precipitation method and the addition of 5 vol.% ZrO2 (ANZ) or 1 vol.% Cr2O3 (ANC). The prepared samples were subjected to the low energy drop weight impact tests to compare the behaviour of the composites under low energy impact and to investigate the damage mechanisms. The pure Al2O3, Al2O3/Ni, Al2O3/ZrO2 and Al2O3/Cr2O3 compositions with the same additive ratios were also produced to make the comparison systematically. Also, the Vickers hardness measurements were carried out and a significant increase in hardness was attained for both ANZ and ANC composites. The average hardness value around 24.8?1.0GPa was measured for the ANZ and ANC composites which means ~15% improvement compared to the pure Al2O3. Between all the compositions, the maximum force (Fmax) value was obtained for the ANZ (for 12 J impact energy level Fmax = 26617N) according to the low energy drop weight impact test results. Tensile radial crack network formation, cone formation, fracture and crushing of the cone structure were observed as damage mechanisms for all compositions. The volume of conical frustum structure was evaluated for each composition and the effect of microstructure on possible ballistic performance was also discussed.

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supporting

confidence: 41%

Section: Hardnessmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 98%

mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Low velocity drop weight impact behaviour of Al2O3-Ni-ZrO2 and Al2O3-Ni-Cr2O3 ceramic composites

Kafkaslıoğlu

Buyuk

Tür

2021

PAC

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Multifunctional composite designs for structural energy storage

Nie,

Lim,

Liu

et al. 2023

Battery Energy

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Structural batteries have emerged as a promising alternative to address the limitations inherent in conventional battery technologies. They offer the potential to integrate energy storage functionalities into stationary constructions as well as mobile vehicles/planes. The development of multifunctional composites presents an effective avenue to realize the structural plus concept, thereby mitigating inert weight while enhancing energy storage performance beyond the material level, extending to cell‐ and system‐level attributes. Specifically, multifunctional composites within structural batteries can serve the dual roles of functional composite electrodes for charge storage and structural composites for mechanical load‐bearing. However, the implementation of these multifunctional composites faces a notable challenge in simultaneously realizing mechanical properties and energy storage performance due to the unstable interfaces. In this review, we first introduce recent research developments pertaining to electrodes, electrolytes, separators, and interface engineering, all tailored to structure plus composites for structure batteries. Then, we summarize the mechanical and electrochemical characterizations in this context. We also discuss the reinforced multifunctional composites for different structures and battery configurations and conclude with a perspective on future opportunities. The knowledge synthesized in this review contributes to the realization of efficient and durable energy storage systems seamlessly integrated into structural components.

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The effect of sintering temperature and low content of TiO2 on the microstructure and mechanical properties of ZTA-TiO2 composites

Usta,

Kafkaslıoğlu Yıldız,

Dara

2023

J Aust Ceram Soc

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An investigation of equibiaxial flexural strength and hardness properties of Al2O3–Ni nanocomposites based microstructures with ZrO2 and Cr2O3 additives

Cited by 13 publications

References 37 publications

Low velocity drop weight impact behaviour of Al2O3-Ni-ZrO2 and Al2O3-Ni-Cr2O3 ceramic composites

Low velocity drop weight impact behaviour of Al2O3-Ni-ZrO2 and Al2O3-Ni-Cr2O3 ceramic composites

Multifunctional composite designs for structural energy storage

The effect of sintering temperature and low content of TiO2 on the microstructure and mechanical properties of ZTA-TiO2 composites

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