Structure of the Al90Y10 Alloy Formed upon Pressure Solidification

Resumo

The effect of temperature and the melt cooling rate on the structure of an Al₉₀Y₁₀ alloy after high-pressure solidification is comparatively studied by X-ray diffraction analysis, optical microscopy, and electron microscopy. Only the crystalline α-Al and Al₃Y phases form in the Al₉₀Y₁₀ alloy under all considered solidification conditions. The effect of the temperature, the cooling rate, and the pressure on the morphology, the size, and the microhardness of the structural alloy constituents, such as primary yttrium aluminide and eutectic crystals, is found.