MEKANOKİMYASAL YÖNTEMLE BOR KARBÜR SENTEZİ VE ALÜMİNYUM MATRİSLİ KOMPOZİT MALZEMEDE KULLANILABİLİRLİĞİNİN İNCELENMESİ

Bu çalışmada, bor ve karbon reaktiflerinden çıkılarak mekanokimyasal yöntemle bor karbür sentezlenmiş ve bu malzemeden stratejik öneme sahip seramik metalik kompozit malzeme üretilerek dayanımı test edilmiştir. Çalışma 2 aşamada gerçekleştirilmiştir. İlk aşamada, 4 farklı orandaki karbon ve bor elementlerinin inert atmosferde mekanokimyasal reaksiyonla oluşumu gerçekleştirilmiş, elde edilen ürünler 1550°Cde sinterlenerek bor karbür kristalleri oluşturulmuştur. İkinci aşamada, 5 farklı oranda hazırlanmış Al-B4C kompozitleri bilyalı değirmende öğütülerek 400 MPa basınçta plaka halinde preslenmiştir. Preslenen Al-B4C kompozitler 600°Cde atmosferik ortamda 1 saat süreyle sinterlendikten sonra sertlik ölçümleri yapılmıştır. Yapılan çalışmalar sonucunda optimum parametrelere sahip numune argon atmosferinde 120 dakika boyunca sinterlenerek hazırlanmış, B/C oranı 4/1 olan, %50 takviye katkılı kompozit numunesi olarak belirlenmiştir. Anahtar kelimeler: Mekanokimyasal reaksiyon, bor karbür, kompozit malzeme

PRODUCTION OF BORON CARBIDE BY MECHANOCHEMICAL METHOD AND INVESTIGATION OF USABILITY ON THE ALUMINIUM BASED COMPOSITE MATERIAL

In this study, boron carbide has been synthesized using boron and carbon elements. Ceramic-metallic composite material produced and tested from this material. The study established two phases. At the first stage, carbon and boron elements, which 4 different ratio, are produced in inert atmosphere with mechanochemical reaction. Products are sintered at 1550° C fort he formation of boron carbide crystals. At the second stage, 5 different rates of Al-B4C composites prepared by making a uniform ball mill, pressed into the plate 400 MPa pressure. After Al-B4C composites pressed at 600 ° C for 1 hour at atmospheric environment, their hardness measurements were carried out. At the end of the study, the sample which was sintered during 120 min in argon atmosphere, B/C ratio is 4/1 and 50% reinforced composite are chosen optimum parameters.

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