Abstract
The steady-state growth crystallography of Al-Al 3Ni and Al-Al 2Cu eutectic single crystals has been determined using precise Kikuchi line electron diffraction techniques. Growth of Al-Al 3Ni is found to be controlled by anisotropic growth kinetics of the Al 3Ni phase, and there is a strong tendency for [010] Al 3Ni , the fibre axis and the growth direction to be mutually parallel. Subsidiary growth anisotropies prevent the aluminium phase orientation from being completely random. Orientation variations within individual crystals are very small. Growth of Al-Al 2Cu is found to be controlled by the formation of a low-energy solid-solid interphase boundary parallel to {111} Al and {211} Al 2Cu . However the crystallography can vary within individual crystals by as much as 8–10°.
Published Version
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