pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (12권4호 326-334)
Microstructure and Thermal Behaviors of Droplets During the Formation of Particle Reinforced Metal Matrix Composites by Spray Casting Process
분사주조에 의한 입자강화 금속기지 복합재료의 제조시 액적의 열적거동과 미세조직에 대한 고찰
Myung-Ho Kim, Cha-Hurn Bae*, Hae-Young Jeong*, Heung-ll Park**
University of Ulsan, *Pusan National University of Technology, ** Pusan National University of Technology
Particle-reinforced metal matrix composites via the Osprey spray casting process were fabricated by injecting second phase particles of Al_2O_3(40μм) and W(6μм) into the spray of Cu droplets, and the thermal behaviors of the composite droplets during flight were considered theoretically on the basis of mixing modes between the Cu droplets and the reinforced particulates injected. It was found that the W-injected spray is comprised of particle-embedded droplets, and the Al_2O_3- injected spray comprises particle-attached droplets. From the predicted results of the thermal behaviors of the composite droplets and preforms produced, it is concluded that the thermal behaviors of the composite droplets during flight, and during the subsequent deposition are strongly influenced by its mixing modes between the reinforced particulates and Cu droplets during flight.
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