The effect of sintering time, temperature, and graphene addition on the hardness and microstructure of aluminum composites

Gürbüz, Mevlüt; Şenel, Mahmut Can; Koç, Erdem

doi:10.1177/0021998317740200

Cited by 94 publications

(31 citation statements)

References 37 publications

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“…These properties are directly related with diffusion phenomena. Eqn (2) and Eqn (3) give the effect of the time and temperature on the powder properties [16,17]. As given the Scherer calculations, the crystallite size of the LMO samples are increases with increasing temperature and time.…”

Section: Resultsmentioning

confidence: 99%

Single Step Solid-State Synthesis of Lanthanum Molybdate

Avcıoğlu

Mutuk

Gürbüz

et al. 2019

Advances in Materials Science

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In this study, LaxMoyOz powders were synthesized by a cost-effective solid-state synthesis method. Four different heating cycles were designed to investigate the effects of synthesis temperature and holding time on lanthanum molybdate (LMO) formation, phase assemblies, particle size and morphology. X-Ray Diffraction (XRD) and scanning electron microscopy (SEM) studies were performed to observe crystal structure and particle morphology of synthesized powders. The results showed that nearly ninety percent β - La2Mo2O9 (43,3 nm crystal size) phase was obtained at 1000 °C for 6 h holding time. Longer holding times at 1000 °C favor more oxygen-rich compounds which cause recrystallization of various new crystalline phases. The grain size of the synthesized powder was increased from 0,2 µm to 1,5 µm with increasing holding time. In summary, it is possible to manufacture LMO powders rich in β - La2Mo2O9 by one - step solid - state synthesis method. The phase assembles and particle size of LMO powders could also be tailored by optimization of heat treatment cycle.

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Section: Resultsmentioning

confidence: 99%

Single Step Solid-State Synthesis of Lanthanum Molybdate

Avcıoğlu

Mutuk

Gürbüz

et al. 2019

Advances in Materials Science

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“…The Vickers hardness of samples was detected by micro-Vickers hardness tester under 200 g load for 15 s. The measurement was carried out at least six times from the surface of the sample and then, they were averaged. The apparent density and compressive strength of composites were performed by Archimedes' density meter and universal test machine (Mares Tst_10t), respectively [15][16][17].…”

Section: B Methodsmentioning

confidence: 99%

Fabrication and Mechanical Behavior of Aluminum Matrix Composites Reinforced with Nano Alumina Particles

Gürbüz¹,

Şenel²

2019

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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In the present work, nano alumina (Al 2 O 3) reinforced aluminum (Al) matrix composites with various alumina content (0-2.5wt.%) were fabricated by powder metallurgy method. This method consists of mixing, ultrasonic dispersion, filtering, drying, pressing, and sintering processes. The effects of nano alumina amount on the Vickers hardness, apparent density, compressive strength, and microstructure of nano alumina reinforced aluminum matrix composites were investigated. The maximum apparent density (2.66 g/cm3), Vickers hardness (43±1 HV), and compressive strength (130±3 MPa) were determined at Al-2wt.%Al 2 O 3 composite. After 2wt.% nano alumina content, the agglomeration was detected by a scanning electron microscope (SEM). This agglomeration deteriorated the mechanical properties of nano alumina reinforced aluminum matrix composites.

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“…The experimental procedure and sintering conditions were studied in our previous study [28]. In summaries, Al-GNPs composites were fabricated by PM method as given in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

“…Graphene has been used as reinforcement element in metal matrices such as aluminum [27][28][29], magnesium [30], and titanium [31] to enhance the properties of metal matrix nanocomposites. However, there are a limited number of studies related to mechanical or tribological properties of Al-GNPs composites.…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Content on Tensile Strength and Microstructure of Aluminum Matrix Composites

Şenel¹,

Gürbüz²,

Koç³

2018

ujms

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In this study, graphene nanoplatelets (GNPs) reinforced aluminum (Al) composites with various GNPs content (0.1, 0.3, 0.5wt.%) were fabricated by powder metallurgy (PM) method. In this method, ultrasonication, mixing, filtering, drying, compacting and sintering processes were performed. The crystal structure and microstructure of powders and fabricated composites were analyzed with X-Ray diffractometer (XRD) and scanning electron microscopy (SEM). With this study, the effects of GNPs content were investigated on the density, Vickers hardness, ultimate tensile strength, and microstructure of Al-GNPs composites. The Vickers hardness (57±2.5 HV) and ultimate tensile strength (120MPa) of Al-0.1%GNPs improved up to +90% and +23.3% when compared with pure aluminum (30±2 HV, 92MPa). From the microstructural analysis, homogeneously distributed GNPs was located at aluminum grain boundaries. The mechanical properties of Al-GNPs composite decreased due to the agglomeration of GNPs above 0.1wt.% GNPs content.

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The effect of sintering time, temperature, and graphene addition on the hardness and microstructure of aluminum composites

Cited by 94 publications

References 37 publications

Single Step Solid-State Synthesis of Lanthanum Molybdate

Single Step Solid-State Synthesis of Lanthanum Molybdate

Fabrication and Mechanical Behavior of Aluminum Matrix Composites Reinforced with Nano Alumina Particles

Effect of Graphene Content on Tensile Strength and Microstructure of Aluminum Matrix Composites

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