Akademik Veri Yönetim Sistemi
Ulusal Toz Metalurjisi Konferansi: Second National Powder Metallurgy Conference, Ankara, Türkiye, 15 - 17 Eylül 1999, ss.399-408
In this study, the relation between cooling rate and powder size of air and nitrogen atomised aluminium powders has been investigated. Cooling rates have been calculated by the secondary dendrite arm spacing (SDAS) measured on microstructure pictures of 10-150μm sized powders. This study shows that the powder size considerably affects the cooling rate, thus the powder size decreases while the cooling rate increases very rapidly. Furthermore, the cooling rate of air atomised powders is higher than that of nitrogen atomised powders. The highest cooling rate calculated on the diameter of 10μm air atomised aluminium powder was 3,78×104°Ks-1 as the lowest cooling rate on the diameter of 150μm nitrogen atomised aluminium powder was 260°Ks-1.