Alüminyum Atıktan Üretilmiş Si3N4 Takviyeli Kompozitlerin Mekanik Özelliklerinin İncelenmesi

Öz

Bu çalışmada öncelikle, atık alüminyum içecek kutuları ergitilip kalıplara dökülerek külçe halinde matris malzemesi elde edilmiştir. Kompozit malzeme üretimi için karıştırma döküm yöntemi kullanılmıştır. Matris malzemesine ağırlıkça % 0.5, % 0.75 ve % 1 oranlarında Si3N4 takviyesi yapılmıştır. Takviye oranlarının kompozit malzemelerin yoğunluk, sertlik, çekme dayanımı, darbe dayanımı ve mikroyapısına etkisi incelenmiştir. Si3N4 takviyeli kompozitlerde, artan takviye oranına bağlı olarak, çekme mukavemeti 54,5 MPa’dan 105,17 MPa’ya, darbe mukavemeti 4,94 J’den 13,18 J’ye ve sertlik 70 HV’den 87,9 HV’ye yükselmiştir. Yapılan yoğunluk ölçümlerinde takviye oranının artmasıyla yoğunluğun ve gözenek oranının arttığı görülmüştür. Üretilen kompozitlerin taramalı elektron mikroskobu (SEM) görüntülerinden, takviye oranının artmasıyla partikül dağılımının arttığı ve takviye malzemesinin homojen olarak dağıldığı belirlenmiştir.

Anahtar Kelimeler

• Atık Alüminyum
• Grafen
• Karıştırma Döküm
• Alüminyum Matrisli Kompozit
• Mekanik Özellik
• Mikroyapı

Investigation of Mechanical Properties of Si3N4 Reinforced Composites Produced from Aluminum Waste

Abstract

In this study, first of all, waste aluminum beverage cans were melted and poured into molds to obtain matrix material in the form of ingots. Stir casting process was used for composite material production. 0.5%, 0.75% and 1% by weight Si3N4 reinforcement was added to the matrix material. The effects of reinforcement ratios on the density, hardness, tensile strength, impact strength and microstructure of composite materials were investigated. In Si3N4 reinforced composites, tensile strength increased from 54,5 MPa to 105,17 MPa, impact strength increased from 4,94 J to 13,18 J, and hardness increased from 70 HV to 87,9 HV depending on the increased reinforcement ratio. Also, in the density measurements, density and porosity ratio increased with the increase of the reinforcement ratio. From the scanning electron microscope (SEM) images of the produced composites, it was determined that the particle distribution increased with the increase in the reinforcement ratio and the reinforcement material was homogeneously dispersed.

Keywords

• Waste Aluminum
• Graphene
• Stir Casting
• Aluminum Matrix Composite
• Mechanical Property
• Microstructure

Kaynakça

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