Investigation of the effect of manufacturing parameters on the density of AlCu-B4C composites prepared by powder metallurgy method

Abstract

In this study, the effect of reinforcement ratio, compression pressure and sintering temperature on the post-sintering density of Al-10%Cu matrix composite material with B4C particle reinforcement at different ratios (0, 10 and 20% by volume) prepared by powder metallurgy method was investigated. High-purity alloy and ceramic powders were used for composite production, the obtained homogeneous mixture was compressed in a cold press and sintered in a tube furnace. The effect of the variables on the density after sintering was investigated using the Taguchi experimental design method. For this purpose, the L9 orthogonal experimental design, which is the most suitable Taguchi design for the process, was chosen and the experiments were carried out according to this matrix. According to the S/N ratio responses obtained as a result of the analyzes made with this design, it was observed that the compression pressure had the highest effect and the reinforcement ratio had a relatively low effect. As a result of the Taguchi experimental design and the regression analysis, it was concluded that the regression model was within the 95% confidence interval.

Keywords

• AlCu matrix
• B4C reinforcement
• Powder metallurgy
• Taguchi experiment design
• Density after sintering

Toz metalurjisi yöntemi ile hazırlanan AlCu-B4C kompozitlerin yoğunluğuna imalat değişkenlerinin etkisinin incelenmesi

Abstract

Bu çalışmada, toz metalurjisi yöntemi ile hazırlanan, farklı oranlarda (hacimce % 0, 10 ve 20) B4C parçacık takviyeli Al-%10Cu ana yapılı kompozit malzemenin sinterleme sonrası yoğunluğuna, takviye oranı, sıkıştırma basıncı ve sinterleme sıcaklığının etkisi incelenmiştir. Kompozit üretimi için yüksek saflıkta alaşım ve seramik tozları kullanılmış, elde edilen homojen karışım soğuk preste sıkıştırılmış ve tüp fırında sinterlenmiştir. Tayin edilen değişkenlerin sinterleme sonrası yoğunluğa etkisi Taguchi deney tasarımı yöntemi kullanılarak incelenmiştir. Bu amaç ile sürece en uygun Taguchi tasarımı olan, L9 ortogonal deney tasarımı seçilmiş ve deneyler bu matrise göre gerçekleştirilmiştir. Bu tasarım ile yapılan analizler sonucunda elde edilen S/N oranı yanıtlarına göre, sıkıştırma basıncının en yüksek etkiye, takviye oranının da görece düşük etkiye sahip olduğu gözlemlenmiştir. Taguchi deney tasarımı ve yapılan regresyon analizi sonucunda, oluşturulan regresyon modelinin ise %95 güven aralığın içinde olduğu sonucu elde edilmiştir.

Keywords

• AlCu anayapı
• B4C takviye
• Toz metalürjisi
• Tagushi deney tasarımı
• Sinterleme sonrası yoğunluk

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