1989 Volume 105 Issue 2 Pages 201-204
Pressureless sintered hexagonal boron nitride (h-BN) were fabricated using turbostratic BN and amorphous B as starting powders. Further, the effects of additives on bending strength and corrosion resistance of the sintered BN were studied.
Bulk density and bending strength of the sintered BN with additives were significantly increased compared to the case of using pure h-BN as a starting powder. Especially in the sintered BN with 5 wt%SiC, high bending strength, -9kg/mm2, were constantly obtained in the range room temperature to 1200C°C. On the other hand, the sintered BN with 30 wt%AlN had revealed superior corrosion resistance. These materials could be applicable to the protective tube for the continuous temperature measurement of molten steel in the range 1500 to 1560C°C.
