Microstructure, hardness, thermal and wear behaviours in Al–10Ni/TiO2 composites fabricated by mechanical alloying

Bülbül, Berna; Okumuş, Mustafa

doi:10.1016/j.matchemphys.2022.125908

Cited by 14 publications

(2 citation statements)

References 65 publications

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“…Besides, it has been observed that bond-free bonding occurs as a result of the fusion between the matrix phase and the reinforcement phase. These results were found to agree with previous studies [45][46][47][48]. As a result, clustering occurs as the rate of reinforcement increases, and the particle size decreases as the milling time increases.…”

Section: Experimental Procedures and Processingsupporting

confidence: 93%

Mekanik alaşımlama ile üretilen Al4.5Cu/TiO2 kompozitlerinin mikroyapı, sertlik ve termal özellikleri

Okumuş¹,

KAYA²,

Göğebakan³

2024

Politeknik Dergisi

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Al4.5Cu/TiO2 composites were fabricated from their elemental powders by the mechanical alloying method. Microstructural and thermal properties of the composites were investigated by a combination of differential thermal analysis (DTA), scanning electron microscopy with energy dispersive X-ray detection (SEM-EDX), and X-ray diffraction (XRD). Microstructural evolutions, phase transformations, and crystallite size changes were investigated depending on the milling time. XRD and SEM results showed that there were a more homogeneous structure and shrinkage in grain size due to the increased milling time. The DTA results showed an endothermic peak of around 650 oC which indicates the melting temperature of Al. Besides, the mechanical properties of the pressed and sintered composites were investigated by Vickers micro-hardness testing. The results showed that microhardness values significantly increased as milling time increased from 5h to 10h. The maximum microhardness value of 173±10 HV was obtained for Al4.5Cu with 20 wt% TiO2 composite after milling for 10h.

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Section: Experimental Procedures and Processingsupporting

confidence: 93%

Mekanik alaşımlama ile üretilen Al4.5Cu/TiO2 kompozitlerinin mikroyapı, sertlik ve termal özellikleri

Okumuş¹,

KAYA²,

Göğebakan³

2024

Politeknik Dergisi

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show abstract

“…8 shows that the plot between time vs Coefficient of Friction (CoF). Plot indicated that CoF increased while increasing time [16]. The same trend is followed like 300 °C sample performed lower that the sample of 400 °C.…”

Section: Wear Testsupporting

confidence: 58%

Investigation on Ni-Al Intermetallic Compounds Fabricated through Reactive Sintering Processes

Azhagarsamy,

Sekar,

Murali

2023

MSF

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The utilization of nickel aluminide compounds in high-temperature structural applications is advantageous due to their desirable properties. One efficient method for producing nickel aluminide samples with desirable chemical reactions using minimal energy is reactive sintering. In this study, Ni-Al (20 wt.%-80 wt.%) compounds were fabricated by initially cold pressing them, followed by reactive sintering. The reactive sintering process resulted in the formation of NiAl3 and Ni2Al3 phases within the Ni-Al compounds. The microstructure, porosity, and hardness of the samples were thoroughly examined and analyzed. Generally, the compounds produced through reactive sintering exhibited significant porosity attributed to shrinkage and the Kirkendall effect. Microstructural analysis confirmed the presence of porosity, NiAl3, and Ni2Al3 phases. The sintered sample processed at 400 °C demonstrated higher density and hardness. Additionally, the wear test indicated a low wear rate and friction coefficient for the sintered sample processed at 400 °C.

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Investigation of Microhardness, Microstructural, Tribological, and Thermal Properties of Al7075/TiO₂/Kaoline Hybrid Metal Matrix Composites Produced by Powder Metallurgy Process

Demir,

Okumuş

2024

Adv Eng Mater

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The shift from traditional, single‐component metals and alloys continues, and researchers are currently investigating alternative materials. This evolution has led to the creation of innovative materials, including hybrid metal‐matrix composites. The present study aims to investigate the microstructural, surface morphological, and thermal properties of a novel Al7075/TiO2/Kaoline hybrid metal‐matrix composite prepared using high‐energy ball milling and sintering methods. In this study, phases related to the composite components are formed depending on the milling time, no undesirable phase is formed, but the peak intensities decreas as the milling time increases. Particle size increases from 63 to 215 μm with increasing milling time. Increasing the kaoline reinforcement ratio and sintering temperature increases the microhardness from 62.27 ± 2 to 75.83 ± 2 HV, and reduces the friction coefficient from 0.82 ± 0.01 to 0.62 ± 0.01. The wear rate of the composite without kaoline addition is 2.1 (mm3 m−1) × 10−3, while with 6 wt% kaoline addition, it decreases to 1.5 (mm3 m−1) × 10−3. There are no cracks in the composite other than plastic deformation due to sintering and wear. Peaks indicating endothermic and exothermic reactions during continuous heating occurr in the 635–750 °C temperature range.

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Microstructure, hardness, thermal and wear behaviours in Al–10Ni/TiO2 composites fabricated by mechanical alloying

Cited by 14 publications

References 65 publications

Mekanik alaşımlama ile üretilen Al4.5Cu/TiO2 kompozitlerinin mikroyapı, sertlik ve termal özellikleri

Mekanik alaşımlama ile üretilen Al4.5Cu/TiO2 kompozitlerinin mikroyapı, sertlik ve termal özellikleri

Investigation on Ni-Al Intermetallic Compounds Fabricated through Reactive Sintering Processes

Investigation of Microhardness, Microstructural, Tribological, and Thermal Properties of Al7075/TiO₂/Kaoline Hybrid Metal Matrix Composites Produced by Powder Metallurgy Process

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Microstructure, hardness, thermal and wear behaviours in Al–10Ni/TiO2 composites fabricated by mechanical alloying

Cited by 14 publications

References 65 publications

Mekanik alaşımlama ile üretilen Al4.5Cu/TiO2 kompozitlerinin mikroyapı, sertlik ve termal özellikleri

Mekanik alaşımlama ile üretilen Al4.5Cu/TiO2 kompozitlerinin mikroyapı, sertlik ve termal özellikleri

Investigation on Ni-Al Intermetallic Compounds Fabricated through Reactive Sintering Processes

Investigation of Microhardness, Microstructural, Tribological, and Thermal Properties of Al7075/TiO2/Kaoline Hybrid Metal Matrix Composites Produced by Powder Metallurgy Process

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Investigation of Microhardness, Microstructural, Tribological, and Thermal Properties of Al7075/TiO₂/Kaoline Hybrid Metal Matrix Composites Produced by Powder Metallurgy Process