Al-Ni系共晶合金을 一方向凝固시켜 그 composite 組織의 成長機構와 기계적성질에 미치는 Mg 첨가량에 따른 영향을 조사 검토하였다. Dendrite 및 composite 조직은 colony 조직에 비하여 기계적성질이 우수하였으며, 또한 dendrite 및 composite 조직이 형성될 수 있는 凝固條件下에선는 G/R 比(G: temperature gradient, R: growth rate)가 작을 수록 引張强度가 증가하였다.

Directional solidification experiments were conducted on Al-Ni eutectic alloys to investigate the growth mechanism and the mechanical behavior of Al-A1₃Ni composites. The effects of the growth rate and the addition of magnesium on the composite structures and the mechanical properties were investigated. Dendritic and composite structures are superior to colony structure as regards the mechanical strength. If the growth condition favors the formation of dendritic or composite structures, a decrease in G/R ratio (G: temperature gradient, R: growth rate) will cause an increase in tensile strength.