Mahir UZUN, Mehmet Mehdi MÜNİS, Üsame Ali USCA

Farklı oranlarda CrC partikül takviyesi kullanılarak toz metalürjisi yöntemiyle üretilmiş Cu matrisli kompozit malzemelerin mikroyapı ve mekanik özelliklerinin incelenmesi

Bu çalışmada, toz metalürjisi (T/M) yöntemi kullanılarak farklı oranlarda CrC partikülleri, Cu matrisi içerisinde kullanılarak Cu matrisli kompozit malzeme üretimi amaçlanmıştır. Bu amaçla Saf Cu tozu içerisine CrC partikülleri ağırlıkça %5, %10, %15 ve %20 olmak üzere farklı oranlarda katılmıştır. Hazırlanan karşımlar 450 MPa basınç altında şekillendirilmiştir. Şekillendirilen parçalar 950 0C’de 60 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. Yapılan SEM incelenmesinde, eş eksenli tanelerden oluşan Cu matrisi içerisinde CrC fazının dengeli dağıldığı gözlenmiştir. Yapılan sertlik ölçümlerinde, CrC oranı arttıkça buna bağlı olarak sertliğin arttığı gözlenmiştir.

Anahtar Kelimeler:

bakır, kompozit, krom-karbür, sertlik

Investigation of microstructure and hardness properties of Cu matrix composite materials produced by powder metallurgy using CrC particle reinforcements at different ratios

In this study, it was aimed to investigate the effect of CrC particles in Cu matrix, Cu matrix composite material production, CrC particles hardness value of Cu matrix composites using powder metallurgy (P / M) method.. For this purpose, CrC particles in pure Cu dust were added at different ratios of 5%, 10%, 15% and 20% by weight. The prepared samples were stirred for 24 hours using a turbula mixer. The prepared mixtures were shaped under a pressure of 450 MPa. The shaped parts were sintered at 950 0C for 60 minutes. The actual and theoretical densities of the sintered samples were determined The success rate of sintering was evaluated by examining the intensity and SEM images. Microstructure and mechanical properties of the produced composite materials were investigated. Microstructure and hardness values 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 CrC phase was uniformly distributed in the Cu matrix composed of coaxial grains. In the hardness measurements made, it was observed that as the CrC ratio increased, the hardness increased accordingly.

Keywords:

copper, composite, crom-carbide, hardness,

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