Technology offer departmens 1, Novel Hybrid Ultrahard Material
Name of the scientific solution / development/ methodology, tool, prototype Contact information: Institute for Superhard Materials of National Academy of Sciences of Ukraine. Prof. Dr. Shulzhenko Alexander Office: 2, Avtozavodskaya Str., Kiev, 04074 Ukraine. Problem Description The essence of the problem of controlling structure and properties of diamond polycrystals is in the ability to produce a new generation of superhard materials that will combine the advantages of using both unique properties of CVD diamonds and diamond polycrystalline composites obtained by HPHT treatment on the basis of theoretical and experimental results obtained from the study of structural changes in the consolidation of diamond powders at high pressures and temperatures in the presence of additives activating the process of sintering The way of the problem solving A strong covalent bond determines a high hardness of diamond, by which it penetrates into the most solid material without permanent deformation. Composite polycrystalline superhard materials obtained by HP-HT method are widely used in the manufacture of cutting and drilling tools that are the least energy-consuming. The diamond composite thermostable materials (DCTM), the dispersed structure of it was created in a strong framework of diamond-diamond bonding between particles, indicate a high strength of diamond particles retention in a composite matrix. In the process of cutting the surface, drill bits with the DCTM inserts penetrate into the rock, creating macro-and micro-cracks that contribute to its further destruction. The average Vickers hardness of DCTM is ~ 50 GPa, which is not enough for cutting especially of hard rocks. Polycrystalline CVD diamond obtained under strictly controlled conditions of activated carbon-hydrogen mixture have a hardness ~ 70 GPa and is synthesized in the form of plates larger than 50 mm and a thickness of several millimeters. At the same time CVD diamond have disadvantages - a tendency to generate high local stresses (up to 10 GPa) in the presence of inclusions of a nondiamond phase, structural and impurity defects, low coefficient of thermal expansion that mismatch with a substrate, the problem of obtaining the raw material of desired size because of the high hardness. During realization of works carried out by joint scientific projects of the NAS of Ukraine and the Russian Fund of basic Research in 2010 (project N° 29-08-10), a new approach was tested, which is using the polycrystalline CVD diamond in the development of hybrid materials with high hardness at high pressure and at a lower temperature (~ 1500 K). Basic publications Novel Hybrid Ultrahard Material ISSN 1063-4576 Journal of Superhard Materials, 2010, Vol 5, pp 293-300. 2. Shul’zhenko A.A., Ashkinazi E.E., Sokolov A.N., et al., Novel Ultrahard Polycrystalline Composite Material, in Porodorazrushayushchii I metaloobrabatyvayushchii instrument-tekhnika I tekhnologiya ego izgotovleniya I primeneniya (Rock Destruction and Metal-Working Tools-Techniques and Technology of the Tool Production and Applications), Collect. Sci. Papers, Kiev: Bakul’ISM, Natl. Acad.Sci., 2009, issue 12, pp.143-153. 3. Shul’zhenko A.A., Nozhkina A.V., Bogdanov R.K., et.al., Wear Resistance and Thermostability of Diamond Polycrystalline Composite Materials, ibid., pp. 237-242 4. Shul’zhenko A.A., Gargin V.G., Shishkin V.A., and Bochechka A.A., Polikristalicheskie materially na osnove almaza (Diamond-Based Polycrystalline Materials), Novikov N.V., Ed., Kiev: Naukova Dumka, 1989. 5. Shul’zhenko A.A. and Sokolov A.N., Synthesis of Special Superhard Materials, Trudy Mezhdunar.Akademii “Kontenant” (Proc. of the Contenant International Academy), Russian Division, vol. 2, Forming of Optical Surfaces, Moscow: Contenant, 2005, pp. 41-84. 6. Novikov N.V., Fedoseev D.V., Shul’zhenko, A.A., and Bogatyreva, G.P., Sintez almazov (Synthesis of Diamonds), Novikov, N.V., Ed., Kiev: Naukova Dumka, 1987. 7. Shul’zhenko A.A., Nozhkina A.V., Gargin V.G., Bogdanov R.K., Zakora A.P., Bogatyreva, G.P., Petasyuk G.A., Loshak M.G., Aleksandrova L.I., Rusinova N.A., Gvyazdovskaya V.L., and Shamraeva V.S. Comparative physico-mechanical characteristics of micron powders of synthetic and natural diamonds and their based-polycrystalline composite materials of Superhard Materials, 2008, Vol.5, pp 7-15. Innovative Aspects of the solution / development/ methodology, tool, prototype Main advantages of the solution / development/ methodology, tool, prototype
Investment Offer (is not obligatory) Current stage of development of the offered solution / development/ methodology, tool, prototype (please, select) Intellectual Property Rights (please, select) 2. Patent for utility model 45291 Ukraine, ÌÏÊ Ñ 04 Â 35/5831, C 04 B 35/80. Superhard material / Shulzhenko O.O., Sokolov O.M., Gargin V.G., etc. – Published 10.11.09, Journal ¹21 3. Patent for utility model 58629 ÌÏ Ñ 04 Â 35/583 (2011.01). Hybrid superhard material / Shulzhenko O.O., Bogdanov R.K., Gargin V.G., Sokolov O.M., Zakora A.P. 4. A registered trademark “ ãèáðèäíûé” (hybrid) Collaboration Details ( 2. Joint venture agreement |