D. A. Stratiichuk, N. M. Belyavina, V. Z. Turkevich, S. P. Starik, Ya. M. Romanenko
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引用次数: 0
Abstract
The chemical interactions between components and high-pressure high-temperature (HPHT) reaction sintering processes (p = 7.7 GPa, T = 2200°C) were studied for superhard composites of groups BH and BL in the cBN–Me and cBN–TiCN–Me systems (where Me = Ni, Co, W with a content of 30 vol %). It was established that, during sintering for 60 s, there is no chemical interaction between the cBN–Me charge components, while the formation of a small amount (1–3 vol %) of additional phases (Ni3B or Co3B, W2B, and W2C) is observed for the cBN–TiCN–Me composites. For all the systems, the resulting metal ceramic has zero porosity and has a monolithic, homogeneous microstructure, in which the original morphology of cBN grains is preserved. The Young’s modulus ranges from 370 to 427 GPa, and the Vickers hardness is 18–25 GPa.
期刊介绍：
Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.
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