Mekanik Alaşımlama ile Üretilen Nanokristal Fe60Al30Cu10 (at.%) Tozların Yapısal ve Mekanik Özellikleri

Avar, Barış; Şimşek, Tuncay; Göğebakan, Musa

doi:10.29109/gujsc.470909

Cited by 5 publications

(5 citation statements)

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“…Bu sonuç malzeme içerisinde SiC oranının düşük olduğunda Al4.5Cu alaşımı içerisinde katı çözelti oluşturduğunu ve kompozit içerisinde SiC oranı azaldıkça kümelenmelerin oluştuğunu, dolayısıyla tane sınırı boylarının ve kristalit boyutunun arttığını işaret etmektedir. Burada takviye oranı sabit tutulup öğütme süresi arttırılsa idi kırılma, yassılaşma ve soğuk kaynaklanma mekanizmalarından dolayı kristalit boyutu benzer çalışmalarda[34,36] olduğu gibi küçülebilirdi. Kristalit boyutunun öğütme süresi ile değişimi ve bu değişimin kompozitin mekaniksel özelliklerine etkisinin araştırılması farklı bir çalışmanın konusu olabilir.Üretilen kompozit malzemelerin ısısal özelliklerini tespit etmek amacıyla DTA çalışmaları yapılmıştır ve sonuçları Şekil 2'de verilmiştir.…”

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Mekanik Alaşımlama Metodu ile Üretilen Al-4.5Cu/SiC Kompozitin Termal ve Mikroyapısal Özelliklerinin İncelenmesi

Okumuş

Bülbül

2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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In this study, Al4.5Cu/SiC alloy matrixed composites are produced by mechanical alloying. The effect of the amount of reinforcement and milling time on the thermal and microstructural properties of the composites produced was investigated by differential thermal analysis (DTA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Also, the microhardness of the pressed and sintered composites was investigated. As a result, the mechanical alloying process led to increased hardness in the microstructure by welding the matrix with homogeneously dispersed reinforcement. Figure A. Microhardness of Al4.5Cu/SiC compositesPurpose: In this study, it was aimed to design and produce high-quality Al-4.5Cu/SiC alloybased composite to be used in many sectors, especially in the maritime, automotive, electrical, and aerospace industries, and to examine its properties.Theory and Methods: Al4.5Cu/SiC alloy matrix composites, in which as reinforcement SiC is mixed into the Al4.5Cu alloy-matrix at a weight ratio of 10-20%, are produced by grinding for 5 and 10 hours with mechanical alloying method. In mechanical alloying processes, the ball-topowder weight ratio is 10:1, and the rotation speed is set to 350 rpm. The composite samples pressed under 250 MPa were sintered in an argon-controlled atmosphere furnace at 700 o C for 1 hour. Hardness measurements were carried out with a Shimadzu microhardness tester using a load of 100 g for 10 seconds. The microstructure properties of the produced powder composites were analyzed using XRD and SEM, and their thermal behavior was analyzed using DTA.Results: It was observed that while the SiC ratio in the composite was low, solid solutions were formed, and as the SiC ratio increased, agglomerations occurred. Endothermic peaks indicating that Al2Cu, α-Al and SiC doped Al4.5Cu solid solution phases melted during continuous heating with DTA. As the SiC ratio and grinding time increased, it was observed that the composite had more homogeneous, irregularly shaped or spherical particles, and shrinkage in particle sizes. In addition, as the milling time and SiC ratio increased, it was found that the sample hardness increased due to the decrease in crystallite size and deformation hardening, and the maximum hardness value was approximately 260 HV. Conclusion:The Al4.5Cu/SiC composites is successfully fabricated by mechanical alloying and sintering. During the production process, no undesirable intermetallic phase occurs in the composites. As the milling time increases, the increase in microhardness indicates an improvement in the mechanical properties of the composites.

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Mekanik Alaşımlama Metodu ile Üretilen Al-4.5Cu/SiC Kompozitin Termal ve Mikroyapısal Özelliklerinin İncelenmesi

Okumuş

Bülbül

2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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“…Alaşımlanma süresinin fazla tutulması, deformasyon sertleşmesi, kristal boyuttaki azalma, katı çözeltilerin oluşmaya başlaması ile birlikte dislokasyon hareketleri engellenir, sonuç olarak sertliği ve mukavemeti önemli ölçüde arttırır. [10] Mekanik alaşımlama için tozlar hemen hemen her formda gerçekleşebilir. Fakat özellikle faz oluşumun inceleneceği çalışmalarda safsızlığın çok düşük olduğu tozlar seçilmelidir [4,11].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Mekanik Alaşımlama Yöntemi İle Demir Ve Bakırın Alaşımlanması

Kurt

ÖZER

2023

Politeknik Dergisi

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“…Numerous synthesis methods have been used for the production of refractory borides such as combustion synthesis, which is also known as self-propagating high-temperature synthesis (SHS), solvothermal, carbothermal and mechanical alloying (MA) methods [2][3][4][5]. Among these methods, MA is intensively preferred for the advantages such as relatively low-cost equipment, simplicity, low-temperature processing, great flexibility in the selection of the processing parameters, and ability to produce large quantities of material with the same physical properties [6][7][8][9]. The powders are subjected to continuous cold-welding, flattened, fracturing and re-welding mechanisms due to impacts on the balls and grinding medium.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Mn2B Nanoparticles by Mechanochemical Method

Şimşek¹,

Şimşek²,

Özcan³

2019

Journal of Boron

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In this study, elemental Mn and B initial materials were used to synthesize pure Mn 2 B nanocrystals by ball milling. Milling experiments were conducted with highenergy planetary ball mill in a hardened steel vial with hardened steel balls, under Ar atmosphere at 40:1 ball-to-powder ratio and 300 rpm rotating speed. As synthesized Mn 2 B nanocrystals phase structures and morphological/microstructural investigation were analyzed by X-Ray diffractometry (XRD) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX), respectively. Particle size of Mn 2 B were calculated as 34.5 nm by Rietveld refinement. Furthermore, the magnetic behavior of nanocrystals were determined by vibrating sample magnetometer (VSM). Mn 2 B sample shows ferromagnetic behavior at room temperature with saturation magnetization of 13 emu/g and coercivity of 90 Oe.

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Mekanik Alaşımlama ile Üretilen Nanokristal Fe60Al30Cu10 (at.%) Tozların Yapısal ve Mekanik Özellikleri

Cited by 5 publications

References 20 publications

Mekanik Alaşımlama Metodu ile Üretilen Al-4.5Cu/SiC Kompozitin Termal ve Mikroyapısal Özelliklerinin İncelenmesi

Mekanik Alaşımlama Metodu ile Üretilen Al-4.5Cu/SiC Kompozitin Termal ve Mikroyapısal Özelliklerinin İncelenmesi

Mekanik Alaşımlama Yöntemi İle Demir Ve Bakırın Alaşımlanması

Fabrication and Characterization of Mn2B Nanoparticles by Mechanochemical Method

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