Toz Metalurjisi Yöntemiyle Üretilen Al-MgO Kompozitlerin Özelliklerine Sinterleme Sıcaklığının Etkisi

Yıl 2020, Cilt: 7 Sayı: 3, 1131 - 1139, 30.09.2020

Mikail Aslan , Engin Ergül , Abdulaziz Kaya , Halil İbrahim Kurt , Necip Fazıl Yılmaz

https://doi.org/10.31202/ecjse.742887

Cited By: 4

Öz

Bu çalışmada, magnezyum oksit (MgO)ilave edilmiş alüminyum (Al) - MgO kompozitler toz metalurjisi yöntemiyle üretilmiştir. Kompozitlerde MgO güçlendirici olarak ağırlıkça %10 oranında ilave edilmiş olup güçlendiricinin ortalama çapı <40 nm boyutundadır. Kompozitler, karıştırma, sıkıştırma ve 5 saat sinterleme süresi ile farklı sinterleme sıcaklıklarına (500 oC – 550 oC – 600 oC) tabi tutulmuşlardır. Kompozitlerin mikroyapıları optik mikroskop ve taramalı elektron mikroskobu (SEM) aracılığıyla incelenmiştir. Kompozitlerin teorik yoğunlukları karışım kanununa göre ve ölçülen yoğunlukları Arşimed prensibine göre araştırılmıştır. Teorik yoğunluk değerleri ve ölçülen yoğunluk değerleri kullanılarak ürünlerin porozite içeriği belirlenmiştir. Ayrıca kompozitlere sertlik testi uygulanarak mekanik özellikleri araştırılmıştır. MgO nano partikül alüminyum matrsinin sertliğini önemli derecede arttırmıştır. Maksimum sertlik değeri Al-10 MgO kompozitte 104 HB olarak elde edilmiştir. Tane büyümesi sertlikte liner büyümeyi engellediği görülmüştür. Artan sıcaklıkla kompozitlerde tane büyümesi meydana gelmekte, porozite içeriği azalmakta ve sertlikte farklı değerler elde edilmektedir. Maksimum relatif yoğunluk 600 oC sintermele sıcaklığı ile elde edilmiştir.

Anahtar Kelimeler

Al, kompozit, MgO, toz metalürjisi

Teşekkür

10-12 Ekim 2019 tarihlerinde Gaziantep Üniversitesi'nde düzenlenen konferansta sunulan çalışmamın seçimi için TICMET19 organizasyon komitesine en derin takdirimi sunmak istiyorum.

Effect of Sintering Temperature on the Properties of Al-MgO Composites Fabricated by Powder Metallurgy Method

Öz

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