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Farklı oranlarda Cr partikül takviyesinin Cu matrislikompozitlerin mekanik özelliklerine ve mikroyapısna etkisi

Effect of Cr particle reinforcements at different ratios on the mechanical properties and microstructure of Cu matrix composites

Journal Name:

  • Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi

Publication Year:

  • 2017

Key Words:

Keywords (Original Language):

Author NameUniversity of Author
Abstract (2. Language): 
Today, the technology is developing very fast and different materials are being developed with new production methods. These materials are better suited to today’s conditions and their usage is becoming widespread. Metal matrix composite materials are widely used and developed in recent years in accordance with this aim. In this study, Cr particles were used in Cu matrix at different ratios by using the powder metallurgy method and Cu matrix composite material was produced. Cr particles in pure Cu dust were added at different ratios of 5%, %10 and %15 by weight. The article size of the Cr powder used was chosen to be under 50 μm. The prepared blends were shaped into a mold produced from the C40 material under a pressure of 400 MPa. The shaped parts were sintered at 900 ° C for 30 minutes. The sintering process was carried out under a protective atmosphere and an alumina base was used. The success rate of the sintering process was evaluated by examining the intensity and SEM images. Microstructure and mechanical properties of the produced composite materials were investigated. Microscope studies were performed using scanning electron microscopy (SEM). In the SEM study, it was observed that the Cr phase was uniformly distributed in the Cu matrix composed of coaxial grains. After sintering, it has been found that the granules are formed in a healthy twinning and the pore structure is decreased, and the grain boundaries can be clearly seen. In addition, it was determined that the relative density value of the sintering end the relative density decreased as the Cr ratio increased. When the mechanical properties are determined, the hardness measurement method is used, in which the measurement is taken from five different points of a sample. The highest hardness value of 40 HV was observed in specimens reinforced with 15% Cr particles by weight. In addition, an increase in hardness was observed depending on the increased Cr ratio. Finally, this work can be supported by the tensile strength test. Again, as a result of different Cr reinforcements, the use of this composite material industry can be supported by determining the wear resistance.
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Abstract (Original Language): 
Bu çalışmada toz metalürjisi (T/M) yöntemi kullanılarak farklı oranlarda Cr partikülleri, Cu matrisi içerisinde kullanılarak Cu matrislikompozit malzeme üretilmiştir. Saf Cu tozu içerisine Cr partikülleri ağırlıkça %5, %10 ve %15 olmak üzere farklı oranlarda katılmıştır. Hazırlanan karşımlar 400 MPa basınç altında şekillendirilmiştir. Şekillendirilen parçalar 900 0C’de 30 dakika boyunca sinterlenmiştir. Sinterleme işleminin başarısı yoğunluğun ve SEM görüntülerinin incelenmesi ile değerlendirilmiştir. Üretilen kompozit malzemelerin mikroyapı ve mekanik özellikleri incelenmiştir. Mikroskop incelemeleri taramalı elektron mikroskobu (SEM) kullanılarak yapılmıştır. Mekanik özelliklerin belirlenmesinde ise sertlik ölçüm metodu kullanılmıştır. Yapılan SEM incelenmesinde, eş eksenli tanelerden oluşan Cu matrisi içerisinde Cr fazının dengeli dağıldığı gözlenmiştir. Ayrıca artan Cr oranına bağlı olarak sertliğin artığı da gözlenmiştir.
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  • Turkish

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