EFFECT OF ELECTRICAL RESISTANCE AND CORROSION PROPERTIES ON GRAFEN ADDED AA1050 METAL MATRIX COMPOSITES

Öz

Since the studies on aluminum matrix composites are mostly designed to examine the mechanical and tribological properties of the addition of different metallic or ceramic oxide added structures, the findings about the different functional properties of such structures are quite limited. In this context, the interaction of the graphene oxide structure, which is one of the carbon-derived structures with superior electrical and corrosive resistance, with the AA1050 matrix becomes very interesting. In this study, changes in microstructure, corrosion and electrical properties of graphene oxide added AA1050 metal matrix composites produced by mechanical stir casting method were investigated. Contrary to solid-state methods, the semi-solid casting technique, known as one of the liquid-state methods, has been chosen to ensure its dispersion in the aluminum matrix of the graphene oxide structure with a high surface area. It has been determined that graphene oxides, which are uniformly dispersed in grain structures due to the increasing amount of additives, increase the electrical resistance of the material from 1kΩ to 60MΩ. In addition, the effect on the corrosive properties was investigated by time-dependent potential (OCP), Tafel and anodic polarization curves, and it was determined that the corrosive resistance increased with increasing graphene oxide content.

Anahtar Kelimeler

• AA1050
• Graphene Oxide
• Corrosion
• Electrical Conductivity
• Casting

GRAFEN OKSİT TAKVİYESİNİN AA1050 METAL MATRİSLİ KOMPOZİTLERİN ELEKTRİKSEL DİRENÇ VE KOROZYON ÖZELLİKLERİNE ETKİSİ

Öz

Alüminyum matrisli kompozitler üzerine yapılan çalışmalar çoğunlukla farklı metalik veya seramik oksit katkılı yapıların ilavesinin mekaniksel ve tribolojik özelliklerini incelemek üzere kurgulanmasından dolayı bu tür yapıların farklı fonksiyonel özellikleri hakkında elde edilen bulgular oldukça sınırlı kalmaktadır. Bu kapsamda üstün elektriksel ve korozif direnç özelliği gösteren karbon türevi yapılardan biri olan grafen oksit yapısının AA1050 matrisi ile etkileşimi oldukça ilgi çekici bir hal almaktadır. Bu çalışmada, mekanik karıştırmalı döküm yöntemi ile üretilen grafen oksit katkılı AA1050 metal matris kompozitlerin mikroyapı, korozyon ve elektriksel özelliklerinin değişimleri incelenmiştir. Katı hal yöntemlerinin aksine, sıvı hal yöntemlerinden biri olarak bilinen yarı katı döküm tekniği ile yüksek yüzey alanına sahip grafen oksit yapısı, alüminyum matris içerisinde dağılımının sağlanması için seçilmiştir. Artan katkı miktarına bağlı olarak tane yapılarında uniform olarak dağılan grafen oksitlerin malzemenin elektriksel direncini 1kΩ’dan 60MΩ’a yükselttiği tespit edilmiştir. Ayrıca, korozif özelliklerine olan etkisi zamana bağlı potansiyel (OCP), Tafel ve anodik polarizasyon eğrileriyle incelenmiş olup, korozif direncin artan grafen oksit miktarıyla artış gösterdiği belirlenmiştir.

Anahtar Kelimeler

• AA1050
• Grafen oksit
• Korozyon
• Elektriksel İletkenlik
• Döküm

Kaynakça

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