ISSN 2594-5327
52º Congresso anual — Vol. 52 , num. 1 (1997)
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During the past decades cubic boron nitride (cBN) and wurtzite boron nitride (wBN) have received considerable attention. These dense modifications of hexagonal graphite boron nitride (gBN) possess hardness approaching that of the diamond and thermal stability better than that of diamond. They are chemically inert and do not react with iron. Superhard materials made from cBN or wBN found wide application in many areas of metal cutting operations. The compact sintered products from superhard boron nitride powder have a polycrystalline composite structure either of cBN or cBN plus wBN. In final industrial form they also have high fracture toughness. The cutting tools made of this material show better service life in interrupted cutting of cast irons and hardened steels. It is essential to have a proper understanding of this class of superhard material in order to realize its full potential not only in cutting applications but, due to their unique physical properties, also in the electronic industry. The present paper shows a comparative analysis of modern methods of producing superhard composites based on cubic boron nitride and wurtzite-like boron nitride. A wide knowledge of this materials will help to find better use for them in various fields of application.
During the past decades cubic boron nitride (cBN) and wurtzite boron nitride (wBN) have received considerable attention. These dense modifications of hexagonal graphite boron nitride (gBN) possess hardness approaching that of the diamond and thermal stability better than that of diamond. They are chemically inert and do not react with iron. Superhard materials made from cBN or wBN found wide application in many areas of metal cutting operations. The compact sintered products from superhard boron nitride powder have a polycrystalline composite structure either of cBN or cBN plus wBN. In final industrial form they also have high fracture toughness. The cutting tools made of this material show better service life in interrupted cutting of cast irons and hardened steels. It is essential to have a proper understanding of this class of superhard material in order to realize its full potential not only in cutting applications but, due to their unique physical properties, also in the electronic industry. The present paper shows a comparative analysis of modern methods of producing superhard composites based on cubic boron nitride and wurtzite-like boron nitride. A wide knowledge of this materials will help to find better use for them in various fields of application.
Palavras-chave
pressure high, cubic boron nitride, wurtzite boron nitride
pressure high, cubic boron nitride, wurtzite boron nitride
Como citar
Bochko, Anatoly Vasilievitch; Bobrovnitchij, Guerold Sergeevitch.
SUPERHARD COMPOSITES OF CUBIC BORON NITRIDE,
p. 3380-3387.
In: 52º Congresso anual,
São Paulo, Brasil,
1997.
ISSN: 2594-5327, DOI 10.5151/2594-5327-C00217-3380-3387
