An Investigation of Wear Behaviours of Mg Matrix Composites Reinforced Carbon Nanotube Produced by Powder Metallurgy Method

Year 2021, Volume: 13 Issue: 3, 1 - 8, 31.12.2021

Musa Yıldırım , Dursun Özyürek

https://doi.org/10.29137/umagd.1038336

Abstract

In this study, production, and wear behaviours of AZ91-carbon nanotube reinforced metal matrix composites by powder metallurgy method were investigated. Composite powders were produced by multi wall carbon nanotube powders (four different amount) were added to AZ91 Mg. Produced composite powders were pre-formed by cold press then they were sintered at 550 ºC for 1 hour. Sintered samples were characterized. Wear tests were done by pin-on disc type wear device under 30 N load with three sliding distances. At the end of the study, it was seen that hardness values were increased with increasing carbon nanotube amount. The maximum hardness value was measured in the 0.25% carbon nanotube added sample. However, according to wear test, the weight loss values were increased with increasing reinforcement amount due to non-homogenous distribution and occurred agglomeration of reinforcement. The maximum weight loss values were measured in added 2 % sample.

Keywords

Mg matrix composites, carbon nanotube, powder metallurgy, wear behaviours

Toz Metalurjisi Yöntemiyle Üretilen Karbon Nanotüp Takviyeli Mg Matrisli Kompozitlerin Aşınma Davranışlarının İncelenmesi

Abstract

Toz metalurjisi yöntemi ile AZ91-Karbon nanotüp takviyeli metal matrisli kompozitlerin üretimi ve aşınma davranışlarının incelendiği bu çalışmada, AZ91 Magnezyum alaşımına çok duvarlı karbon nanotüp ilave edilerek kompozit tozlar üretilmiştir. Üretilen kompozit tozlar soğuk preslenerek ön şekillendirilmiş arkasından 550 ºC’de 1 saat sinterlenmiştir. Sinterlenen kompozitlerin karakterizasyon çalışmaları yapılmıştır. Pin-on disk tipi aşınma cihazında 30 N yük altında üç farklı kayma mesafesinde aşınma testleri yapılmıştır. Yapılan çalışmalar sonucunda karbon nanotüp ilave edilen kompozitlerde sertlik değerinin arttığı en yüksek sertlik %0,25 karbon nanotüp ilave edilen kompozitte elde edilmiştir. Ancak yapılan aşınma testleri sonucunda takviye elemanının yapı içerisinde homojen dağılmaması ve oluşan aglomerasyonlar sonucu ilave edilen takviye miktarıyla aşınmanın arttığı, ağırlık kaybındaki en yüksek değer %2 karbon nanotüp takviyeli kompozitte elde edilmiştir.

Keywords

Mg matrisli kompozit, karbon nanotüp, toz metalürjisi, aşınma davranışları

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