ormation of Nanosized Inclusions in Cubic Boron Nitride Single Crystals
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Abstract
Cubic boron nitride (c-BN) crystals with dimensions of 0.3-0.4 mm, which have been synthesized using lithium nitride (Li3N) as a catalyst with a high-pressure high-temperature method, were examined by transmission electron microscopy (TEM). The TEM result shows that there exits some nanostructrued areas containing several types of nanosized foreign particles within the as-grown c-BN crystals. We find that the nanometer inclusions are hexagonal BN with the lattice constants of a = 2.054Å and c = 6.66Å, tetragonal B25N with a = 8.79Å and c = 5.08Å, tetragonal B53N with a = 8.79Å and c = 5.08Å, and hexagonal Li3N with a = 3.648Å and c = 3.875Å. -
References
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