Cam Partikül Takviyeli Alüminyum Matrisli Kompozitlerin Mikrodalga Sinterleme Yöntemi ile Üretimi

Bu çalışmada, %0-20 atık cam tozları içeren aluminyum kompozit numuneler üretilmiştir. Farklıoranlarda cam tozu takviyesi içeren karışımlar yüksek devirli bilyeli öğütme işlemine maruz bırakıldıktansonra tek eksenli hidrolik presleme ile şekillendirilmiştir. Sinterleme işlemleri mikrodalga fırındagerçekleştirilmiştir. Tekrar edilebilir uygun sinterleme sıcaklıkları ev tipi bir mikrodalga fırının başarılı birşekilde modifiye edilmesi ile elde edilmiştir. Sinterleme işlemleri 550oC’de 18 dk süre ilegerçekleştirilmiştir. Kompozit numunelerin faz içerik ve mikroyapıları incelemelerinde istenmeyenarayüzey reaksiyon ürünlerine rastlanılmamıştır. Sinterleme sonrasında cam tozu katkılı numunelerdekiporozite miktarının ham durumdaki numunelere kıyasla azalması (%20 CT için %13’ten %8,5’e kadar),sinterleme işleminin göreceli başarısını göstermiştir. Artan cam partikül katkısına göre numunelerinbasma yüklemesi altındaki davranışları incelendiğinde, takviye partikül oranı artıkça basma dayanımıdeğerinin 67 MPa’dan 234 MPa’a kadar arttığı tespit edilmiştir. Bununla birlikte katkısız alüminyumunmikrosertlik değeri (53 Hv) %20 cam partikül takviyesi ile birlikte 77 Hv’ye kadar artırılmıştır.

Production of Glass Particle Reinforced Aluminum Matrix Composites by Microwave Sintering Method

In this study, aluminum composite samples containing 0-20% waste glass powders were produced. Mixtures containing different amounts of glass powder reinforcement were shaped by uniaxial hydraulic pressing after subjected to high-speed ball milling. The sintering process was carried out in the microwave oven. Controllable suitable sintering temperatures were achieved by successfully modifying a domestic microwave oven. The sintering processes were performed at 550oC for 18 minutes. During the phase and microstructure analysis of composite samples, undesirable interface reaction products were not encountered. After sintering, the amount of porosity in samples with glass powder decreased compared to the samples in the green state (from 13% to 8.5% for 20% CT), indicating the relative success of the sintering process. When the mechanical behaviors of the samples under compression loading were examined, it was determine that the compressive strength values of the samples increased from 67 to 234 MPa, as fraction of the glass particles were increased. In addition, the microhardness value of pure aluminum (53 Hv) was increased to 77 Hv with 20% glass particle addition.

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