Mekanik Alaşımlama Metodu ile Üretilen Al-4.5Cu/SiC Kompozitin Termal ve Mikroyapısal Özelliklerinin İncelenmesi

Yıl 2020, Cilt: 8 Sayı: 2, 405 - 417, 28.06.2020

Mustafa Okumuş , Berna Bülbül

https://doi.org/10.29109/gujsc.704063

Cited By: 1

Öz

Bu çalışmada, farklı oranlarda SiC takviyeli Al4.5Cu alaşım matrisli kompozitleri farklı öğütme sürelerinde mekanik alaşımlama yöntemiyle üretilmiştir. Katkı miktarının ve öğütme süresinin kompozitin termal ve yapısal özellikleri üzerine olan etkisi incelenmiştir. Üretilen kompozitlerin mikroyapı özellikleri X-ışını kırınımı (XRD) ve taramalı elektron mikroskobu (SEM) ile termal davranışları ise diferansiyel termal analiz (DTA) ile araştırılmıştır. Üretilen toz kompozitler preslendikten sonra sinterleme işlemine de maruz bırakılmıştır. Sinterlenen numunelerin yüzey analizleri optik mikroskop ile incelenmiştir ve ayrıca yüzey sertlikleri de ölçülmüştür. XRD ve SEM sonuçları öğütme süresi arttıkça tane boyutunda küçülme ve daha homojen bir yapı oluştuğunu göstermiştir. DTA sonuçlarına göre sürekli ısıtma esnasında 550-650 oC sıcaklık aralığında faz dönüşümünü işaret eden bir dizi ekzotermik pik gözlenmiştir. Optik mikroskop sonuçlarının SEM analizleri ile uyum içinde olduğu ve ayrıca yüzey sertliğinin katkı miktarı ve öğütme süresi arttıkça arttığı görülmüştür.

Anahtar Kelimeler

Metal matrisli kompozitler, Mekanik alaşımlama, Termal özellikler, Mikroyapı, Mikrosertlik

Destekleyen Kurum

Batman Üniversitesi Bilimsel Araştırma Projeleri Koordinasyonu

Proje Numarası

BTÜBAP-2019-YL-11

Teşekkür

Batman Üniversitesi Bilimsel Araştırma Projeleri Koordinasyonuna BTÜBAP-2019-YL-11 nolu proje ile çalışmamıza sağladığı finansal destek için teşekkür ederiz.

Kaynakça

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