Production and Properties of Al/NbB2 In-situ Composite

Öz

In this study, NbB2 particle reinforced composites in Al matrix were produced by in-situ method. The effects of particle reinforcement at different ratios and production time on composites were investigated. The size and spatial distribution of the formed particles were examined, and the effect on grain size and hardness was determined. As a result of the studies, it was determined that the mixing time is as important as the alloying ratio in the formation of particles, and the best values were obtained in the 3.75% NbB2 added composite, which was formed after 1.5 hours of mixing. In this composite, the grain size was reduced to 112 μm and the hardness was 306.4 MPa.

Anahtar Kelimeler

• Aluminium
• Boride
• Grain refiner
• Casting
• Composite

Al/NbB2 In-Situ Kompozit Üretimi ve Özelliklerinin İncelenmesi

Öz

Bu çalışmada in-situ yöntemi ile Al matriste NbB2 partikül takviyeli kompozitler üretilmiştir. Farklı oranlarda partikül takviyesinin ve üretim süresinin kompozitler üzerindeki etkileri incelenmiştir. Oluşan partiküller, boyutları ve dağılımları incelenmiş, tane boyutu ve sertliğe etkisi belirlenmiştir. Yapılan çalışmalar neticesinde partikül oluşumunda karıştırma süresinin kullanılan alaşım oranı gibi önemli olduğu belirlenmiş ve en iyi değerler 1,5 saat karıştırma sonucu oluşan %3,75 NbB2 ilaveli kompozitte elde edilmiştir. Bu kompozitte tane boyutu 112 μm seviyelerine inmiştir ve sertlik 306,4 MPa olmuştur.

Anahtar Kelimeler

• Alüminyum
• Borür
• Tane inceltici
• Döküm
• Kompozit

Kaynakça

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