Microhardness and tension tests at room and elevated temperatures were carried out on Al-T (ternary compound) regular eutectic alloys in the coupled growth region. The eutectics are hardened linearly in proportion to λ
-1 (λ: interphase spacing) and: Fe+Ni%. The tenslie strength at room temperature depends on the microstructure and volume fraction of fibers. The maximum strength is 31kg/mm
2. The non-cellular rod-like eutectic has a modulus of elasticity of fibers
Ef=12700kg/mm
2 and strength σ
f=240kg/mm
2. The Al-T eutectic is stronger than the Al-NiAl
3 eutectic and has a more stable fiber-matrix interface at 200° to 500°C. The Al-T eutectic in which rod-like regular eutectics are easily grown has strength equivalent to that of the Al-NiAl
3 eutectic. It is further available for composite materials than Al-FeAl
6.
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