Effect of BN Addition on the Mechanical Properties of B4C/Al Hybrid Composites Produced via Squeeze Casting Method

Öz

In this study, effects of boron nitride (BN) addition on the mechanical properties of boron carbide reinforced (B4C) aluminum (Al) composites were investigated. 3, 5 and 10 wt. %BN were added to Al matrix composites reinforced with 5% B4C and melts were cast by squeeze casting technique under 75 MPa casting pressure to produce BN-B4C/Al hybrid composites. Control samples were prepared without any BN and B4C addition for comparison purposes and effect of BN and B4C addition on the density and chip lengths of the produced materials were obtained. In order to determine the effect of BN addition on the mechanical properties hardness measurements were conducted and the yield and ultimate tensile strengths and per cent elongation values were determined by tensile testing and results were compared.

Anahtar Kelimeler

• Aluminum
• Boron nitride
• Boron carbide
• Squeeze casting
• Mechanical properties

BN İlavesinin Sıkıştırma Döküm Yöntemi ile Üretilen B4C/Al Hibrit Kompozitlerin Mekanik Özellikleri Üzerine Etkileri

Öz

Yürütülen çalışma kapsamında, bor nitrür (BN) ilavesinin bor karbür (B4C) ile güçlendirilmiş alüminyum (Al) kompozitlerinin mekanik özellikleri üzerindeki etkileri incelenmiştir. Ağırlıkça %5 B4C katkılı olarak hazırlanan alüminyum matriks kompozit malzemelere ağırlıkça %3, %5 ve %10 BN ilave edilerek ve 75 MPa basınç altında sıkıştırma döküm yöntemi ile döküm işlemi gerçekleştirilerek BN-B4C/Al hibrit kompozit malzeme üretilmiştir. Kontrol ve karşılaştırma amacıyla, BN ve B4C ilavesi olmaksızın alüminyumdan elde edilen numuneler kullanılmış; BN ve B4C ilavesinin üretilen malzemelerin yoğunlukları üzerine etkileri ve ortalama talaş uzunlukları incelenmiştir. BN katkısının mekanik özellikler üzerindeki etkisini belirlemek amacıyla, sertlik ölçümleri gerçekleştirilmiş; malzemelerin akma dayanımları, çekme dayanımları ve yüzde uzama miktarları çekme testi yardımıyla belirlenmiş ve karşılaştırılmıştır.

Anahtar Kelimeler

• Alüminyum
• Bor nitrür
• Bor karbür
• Sıkıştırma döküm
• Mekanik özellikler

Kaynakça

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