Growth of Tungsten Carbide Monocrystals

Abstract
Tungsten carbide monocrystals have been grown from a Co flux using a modified Czochralski technique. These crystals are about 1 cm in size, show little internal strain, and contain few Co inclusions. The highest‐quality crystals grow in the [0001] direction with a melt composition of 16 mole% WC‐84 mole% Co, a surface temperature of 1475°C, and a pulling rate of 0.2 mm/h.