Polar anisotropy of microhardness for refractory boride single crystals of different syngony
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Anisotropy of Knoop microhardness is measured in different directions within the limits 0–90 and 0–180° with a step in the azimuth of 22.5° in different identified faces of single crystals belonging to different crystallographic syngony of refractory borides, some of which are used as antioxidants in the production of carbon-containing refractories. Single crystals are prepared from Al solution-melts with slow cooling of the system from 1200–1400 to 20°C. Experimental data for polar anisotropy of microhardness with a step in azimuth indicated are obtained for the first time and their qualitative interpretation is provided.
KeywordsAzimuth Boride Refractory Compound Titanium Diboride Polar Anisotropy
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