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

Year 2018, Volume: 4 Issue: 1, 99 - 109, 17.05.2018

İsmail Topcu

https://doi.org/10.28979/comufbed.359796

Cited By: 6

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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