Karbon Nanotüp Takviyeli Alüminyum Matriksli AlMg/KNT Kompozitlerinin Mekanik Davranışlarının İncelenmesi

Abstract

Bu çalışmada, toz metalürjisi tekniği kullanılarak AlMg matriksine ağırlıkça farklı  oranlar da  (%2,5, %5 ve %10) KNT takviyesi ile güçlendirilmiş AlMg/KNT nano kompozit materyalleri sentezlenmiştir. Mekanik alaşımlama (MA) işlemi 7 saat ve 400 Rpm de Turbula  karıştırma cihazında yapılmıştır. Mekanik alaşımlamanın ardından sırası ile toz karekterizasyonu, optik incelemeler, sertlik ve yoğunluk testleri yapılmıştır. XRD spektrometre cihazında 10-90 derecede taranarak hassasiyetle XRD incelenmiş ardından 200 Mpa basınç altında metal kalıpta numuneler üretilmiştir. Üretilen AlMg/KNT kompozit numuneleri yüksek vakum altında farklı (350 ⁰C, 400 ⁰C, 450 ⁰C)  sıcaklıklar da  120 dakika boyunca sinterlenerek üretilen numunelerin sertlik, yoğunluk ve metalografik incelemeleri yapılmıştır. Aynı atmosferde, farklı sıcaklık ve farklı KNT oranlar ile üretilmiş olan AlMg/KNT kompozit numunelerin pik şiddetlerinde  artan KNT oranları ile birlikte 42,6º gözle görülür şekilde  artış gözlemlenmiştir. Aynı şekilde artan KNT oranı ile birlikte sinterleme sıcaklığına bağlı olarak sertlik değerlerinde iyileşme ve  buna karşılık artan KNT oranı ile birlikte yoğunluk düşüşü gözlemlenmiştir.

Keywords

• Sinterleme,Nano Malzemeler,Toz metalürjisi

Investigation of Mechanical Behavior of Carbon Nanotube Reinforced Aluminum Matrix AlMg / KNT Composites

Abstract

In this study, AlMg / KNT nanocomposite materials reinforced with KNT reinforced with different proportions (2.5%, 5% and 10%) to AlMg matrix were synthesized using powder metallurgy technique.

The mechanical alloying (MA) process was carried out in Turbula mixing device for 7 hours and 400 rpm.

After mechanical alloying, powder characterization, optical examinations, hardness and density tests were carried out. The XRD spectrometer was scanned at 10-90 degrees to sensitively XRD the specimen, and then samples of metal mold under 200 MPa pressure were produced. Composite samples of AlMg/KNT produced were sintered at different temperatures (350 ºC, 400 ºC, 450 ºC) for 120 minutes under high vacuum, and hardness, density and metallographic investigations of the samples were made. In the same atmosphere, an increase of 42,6º visibly was observed with increasing CNT ratios in peak intensities of AlMg / KNT composite specimens produced with different temperature and different CNT ratios. Along with the increased KNT ratio in the same way, the improvement of the hardness values due to the sintering temperature and the corresponding decrease in the density of KNT were observed.

Keywords

• Sintering,Nano Materials,Powder Metallurgy

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