What is it about?
Sinters of cBN-TiN/TiC after heat treatment were characterized using transmission electron microscopy and X-ray diffraction. The samples exhibit dense polycrystalline structure, and at the BN - binder interface a thin layer of fine TiB2 is visible. The hardness decreases significantly after heat treatment.
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Why is it important?
Owing to their unique physicomechanical properties these materials are frequently applied in machine engineering as cutting blades that are especially useful for processing of quenched steel and cast iron.
Perspectives
Modification of this composites is promising in developing its optimal hardness, its high electrical resistivity in combination with high thermal shock behavior, high corrosion resistance, and high transparency for x-rays. When compared to diamond, cBN is particularly attractive owing to its superior fracture toughness and oxidation resistance.
prof.dr hab.inż. Stanislaw Jan Skrzypek
Akademia Gorniczo-Hutnicza im Stanislawa Staszica w Krakowie
Read the Original
This page is a summary of: cBN–TiN, cBN–TiC composites: chemical equilibria, microstructure and hardness mechanical investigations, Diamond and Related Materials, October 1999, Elsevier,
DOI: 10.1016/s0925-9635(99)00131-4.
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