T. B. Serbeniuk, T. O. Prikhna, V. B. Sverdun, V. E. Moshchil, M. V. Karpets, A. A. Marchenko, V. V. Bilorusets, S. P. Starik
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引用次数: 0
Abstract
The structure formation features and mechanical properties of the AlN–С–TiB2 ceramic composite containing 2 wt % of diamond powder and 13 wt % of TiB2 for vacuum electronics applications were investigated. Composite samples were sintered by hot pressing at a temperature 1900°C and a pressure of 20 MPa. Using structural and X-ray diffraction studies, the AlN, Al3(O, N)4, TiB2, TiC, Y3Al5O12, and C (graphite) phases were revealed in the material. When measuring the mechanical properties, it was found that the Vickers hardness of the studied composite materials is 12.5 ± 0.44 GPa at a load on the indenter of 9.8 N. Increasing the indenter load to 49 N led to the formation of cracks, and the fracture toughness under such conditions was 5.82 ± 0.11 MPa m0.5.
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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