Elektrik Akım Destekli Sinterleme Yöntemiyle Alüminyum Matrisli Rgo Takviyeli Kompozitlerin Geliştirilmesi

Yıl 2024, Cilt: 9 Sayı: 1, 35 - 44, 29.06.2024

Yakup Pehlivan , Harun Gül

https://doi.org/10.56171/ojn.1476115

Öz

Bu çalışma da toz metalursiji yönteminden faydalanarak alüminyum matrisli indirgenmiş grafen oksit (rGO) takviyeli kompozitler akım destekli sinterleme yöntemi ile (ECAS) üretilmiştir. Üretilen numulerde kullanılan alümiyumun ortalama tane boyutu 20 mikron olup 2 ile 5 tabakalı indirgenmiş grafen oksitler aracılı ile kompozit malzemeler elde edilmiştir. Bu amaçla saf alüminyum, %3, %8 ve %16 rGO katkılı kompozit malzemeler ECAS yöntemi ile 2000A/14 dk şartlarında üretilmiştir. Üretilen kompozitlerin karekterizasyonu için taramalı elektron mikroskobu (SEM) ve X ışınları kırınım analizi (XRD) tekniklerinden faydalanılmıştır. Ayrıca kompozitlerin elektro kimyasal davranışlarını belirlemek amacıyla korozyon testi yapılmıştır. Artan rGO takviyesi ile homojen dağılıma sahip alüminyum matrisli kompozit yapılar elde edilmiştir. rGO fazının varlığı XRD analizi ile de doğrulanmıştır. Elektro kimyasal testler sonucunda artan rGO takviyesi ile korozyon dayanımının arttığı tespit edilmiştir. En yüksek korozyon dayanımına sahip malzemenin de %16 rGO içeren alüminyum matrisli kompozit malzeme ile elde edildiği ortaya konmuştur. Bununla birlikte kompozit malzemelerde en yüksek sertlik değeri %3 rGO içeren kompozit malzemede olduğu, aşınma dayanımı ve sürtünme katsayısı açısından ise optimum sonuca yine en düşük grafen oksit içeren (%3 rGO) kompozit malzemede ulaşılmıştır.

Anahtar Kelimeler

Alüminyum, rGO, ECAS, Sinterleme, Korozyon, Aşınma

Development Of Alumınum Matrıx Rgo Reınforced Composıtes By Electrıc Current Assısted Sınterıng

Öz

In this study, reduced graphene oxide (rGO) reinforced composites with aluminium matrix were fabricated by using powder metallurgy method by current assisted sintering (ECAS). The average grain size of aluminium used in the produced samples is 20 microns and composite materials were obtained by means of 2 to 5 layers of reduced graphene oxides. For this purpose, pure aluminium, 3%, 8% and 16% rGO doped composite materials were produced by ECAS method under 2000A/14 min conditions. Scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD) techniques were used for the characterisation of the composites. Corrosion tests were also carried out to determine the electrochemical behaviour of the composites. Aluminium matrix composite structures with homogeneous distribution were obtained with increasing rGO reinforcement. The presence of rGO phase was also confirmed by XRD analysis. As a result of electro chemical tests, it was determined that corrosion resistance increased with increasing rGO reinforcement. It was revealed that the material with the highest corrosion resistance was obtained with aluminium matrix composite material containing 16% rGO. However, the highest hardness value in composite materials was found in the composite material containing 3% rGO, while the optimum result in terms of wear resistance and friction coefficient was reached in the composite material with the lowest graphene oxide content (3% rGO).

Anahtar Kelimeler

Aluminium, rGO, ECAS, Sintering, Corrosion, Wear resistance

Kaynakça

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