An experimental method for the in-situ observation of eutectic growth patterns in bulk samples of transparent alloys
Abstract
We present an experimental method for the in-situ observation of directional-solidification fronts in bulk samples of transparent eutectic alloys. The growth front is observed obliquely in dark field through the liquid and a glass wall of the container with a long-distance microscope. We show that a focused image of the whole growth front can be obtained at a certain tilt angle of the microscope. At this tilt angle, eutectic fibers of about 3.5 in diameter can be clearly seen over the whole growth front in 400- thick samples.
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