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용융 (熔融) 마그네슘중 SiC 입자분산거동에 미치는 합금원소의 영향
임석원,장융랑 (長隆郞),박용진 ( Suk Won Lim,Takao Choh,Young Jin Park ) 한국주조공학회 1992 한국주조공학회지 Vol.12 No.6
熔融 마그네슘中 SiC粒子分散擧動에 미치는 合金元素의 영향에 대하여 調査하였다. 마그네슘中 Sic粒子의 分散을 위한 所要時間은 總時間으로 定義했다. 總時間은 Ce, Mn, Cr, Bi, Pb, Sn 및 Zn을 添加하여도 總時間은 지연되었고 粒塊成의 數는 많이 나타났다. N/A
용탕교반법에 의한 SiC 입자강화 Mg 기 복합재료의 기계적 특성
임석원,장융랑 (長隆郞),박용진 ( Sug Won Lim,Takao Choh,Young Jin Park ) 한국주조공학회 1993 한국주조공학회지 Vol.13 No.5
N/A SiC particulate reinforced magnesium matrix composites were fabricated by melt stirring method. The effet of several factors on mechanical properties and the efficiency of melt stirring method from the viewpoint of these properties were investigated. The tensile strength increased and the elongation decreased with decrease of the particle size or the increase of the paticulate volume fraction for pure magnesium matrix and Mg-5%Zn alloy matrix composites. A longer stirring time improved the tensile strength of these composites. The tensile strength of Mg-5%Ca alloy matrix composites which shows no uniform particulate distribution was a little lower than that of matrix alloy. Rapid solidification rate is preferred for the improved tensile strength of these composites. The pure magnesium matrix and Mg-5%Zn alloy matrix composites have tensile strength of about 400㎫. This value agrees with the tensile strength of some magnesium matrix composites fabricated by liquid infiltration method or powder metallurgy method at the same volume fraction of reinforcements of whisker or particle. Therefore, the melt stirring method which has the advantages of simple process is considered to be efficient in fabricating magnesium matrix composites.
TiC 입자강화 Mg 복합재료에 있어서 입자 분산거동 및 기계적 성질에 미치는 합금원소의 영향
임석원,장융랑 (長隆郞),박용진 ( Suk Won Lim,Takao Choh,Yong Jin Park ) 한국주조공학회 1994 한국주조공학회지 Vol.14 No.3
N/A TiC particulate reinforced magnesium matrix composites were fabricated by melt stirring method. The effect of alloying elements on TiC particulate dispersion into molten magnesium and mechanical properties were investigated. The incorporation time is defined as the time required for dispersion of solid particles into molten metal. The incorporation time of TiC particles into molten pure magnesium was remarkably shorter and the particulated dispersion was more uniform than that of pure aluminum which was reported previously. The incorporation time was, prolonged by the addition of Al, Bi, Ca, Ce, Pb, Sn or Zn. The tensile strength increased and elongation decreased by the addition of Cu or Sn into the matrices and composites. Although, the tensile strength of the matrices and composites increased by alloying with Ca or Ce, the maximum elongation was observed at a content of about 1% for the matrices. By alloying with Zn, the tensile strength increased for the matrices and composites, but the elongation of the matrices increased. The pure magnesium and its alloy matrix composites reinforced with 20vol% TiC have the tensile strength of about 400㎫. This value is compared with the tensile strength of SiC whisker reinforced magnesium matrix composites fabricated by liquid infiltration method at the same volume fraction. There fore, the melt strirring method which has the advantages of simple process is considered to be efficient in fabricating magnesium matrix composites.