Al6061 Matrisli Hibrit Kompozitlerin Sertlik ve Çekme Dayanımına SiC Al2O3 ve Yumurta Kabuğu Tozu Takviyesinin Etkilerinin İncelenmesi

Bu çalışmanın amacı kolayca bulunabilen atıklardan elde edilen takviye kullanarak çevre dostu ve uygun maliyetli alüminyum matrisli kompozit geliştirmektir. Tavuk yumurtası kabuğu, bertaraf edilmediği takdirde ciddi çevresel tehlikeye neden olan endüstriyel bir atık olduğundan bu çalışmada takviye malzemesi olarak kullanılabilirliğinin yanı sıra SiC ve Al2O3 gibi geleneksel takviye malzemeleri ile uyumu da araştırılmıştır. Bu kapsamda hibrit kompozit üretimi için iki kademeli karıştırmalı döküm yöntemi kullanılarak, Al6061 matrisli, yumurta kabuğu tozu, SiC ve Al2O3 takviyeli hibrit kompozitler üretilmiştir. Kompozitler ağırlıkça %1, 3, 5, ikili hibrit kompozitler ağırlıkça %4, 6, 8 ve üçlü hibrit kompozitler ise ağırlıkça %7, 9, 11 takviye-hacim oranlarında 22-59µm toz boyutuna sahip takviyeler kullanılarak üretilmiştir. Üretilen kompozitlerin mikro yapıları taramalı elektron mikroskobu ile görüntülenerek takviyelerin varlığı tespit edilmiştir. Kompozitlerin sertlikleri Brinell sertlik ölçüm yöntemi kullanılarak, maksimum çekme gerilmeleri ve birim uzama miktarları ise çekme testi ile belirlenmiştir. Kompozit içerisinde ağırlıkça yumurta kabuğu tozunun artması ile sertlik ve maksimum çekme gerilmesi artarken, birim uzama miktarının azaldığı belirlenmiştir.

Anahtar Kelimeler:

kompozit, Karıştırmalı Döküm, Yumurta Kabuğu Tozu, Mekanik Özellikler

Investigation of the Effects of SiC Al2O3 ve Eggshell Powder Reinforcement on the Hardness and Tensile Strength of Al6061 Matrix Hybrid Composites

The aim of this study is to develop an environmentally friendly, and cost-effective aluminum matrix composite using reinforcement from readily available waste. Since chicken eggshell is an industrial waste that causes serious environmental hazards if not disposed of, this study investigated its compatibility with conventional reinforcement materials such as SiC ve Al2O3 as well as its compatibility as a reinforcement material. In this concept, hybrid composites with Al6061 matrix, eggshell powder, SiC and Al2O3 reinforcement were produced using two-stage stir casting method. The composites were produced using reinforcements with 22-59µm powder size at reinforcement-to-volume ratios of 1, 3, 5 wt%, 4, 6, 8 wt% for binary hybrid composites ve 7, 9, 11 wt% for triple hybrid composites. The microstructures of the composites were monitored by scanning electron microscopy to determine the presence of reinforcements. The hardness of the composites was examined by using Brinell hardness measurement method, while ultimate tensile stress and elongation were determined by tensile test. It was observed that the hardness, ultimate tensile stress increased and the elongation decreased with the increase of eggshell powder by weight in the composite.

Keywords:

Composite, Stir Casting, Eggshell Powder, Mechanical Properties,

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