Special features of the compaction and phase transformations of wurtzitic boron nitride nanopowders under the action of high static pressures and temperatures
Source abstract
Abstract
The experimental results of special features of the compaction and attendant phase transformations of compacts formed in sintering wurtzitic boron nitride nanopowders at high static pressures ( p = 7.7 GPa) and temperatures ( T = 1100–1800°C) have been considered. The principal possibility to produce polycrystalline superhard materials with nanocrystalline granular structures based on wurtzitic boron nitride has been established. The compaction of nanodispersed wurtzitic boron nitride at high barothermal conditions has been found to correspond to common regularities of the compaction of dispersed powder systems with regard to the effect of the phase and structural transformations.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Boron and Carbon Nanomaterials Research · Advanced ceramic materials synthesis · Diamond and Carbon-based Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (11)
Show source-provided references
1. Volkogon, V.M., Bochko, A.V., and Balan, T.R., Kinetics of the wBN → gBN transformation under the conditions of nonisothermal sintering, High Pres. Phys. Techn., 1986, issue 22, pp. 56–59.
2. Bezhenar, N.P., Shul’zhenko, A.A., Svedov, L.K., Bozhko, S.A., and Belyavina, N.N., The cBN → hBN phase transformation in a nanopowder induced by high quasi-hydrostatic pressure without thermal activation, J. Superhard Mater., 2006, vol. 28, no. 4, pp. 76–78.
3. Volkogon, V.M., Effect of shear stress on polymorphous transformations in wurtzitic boron nitride, Ibid., 1993, no. 3, pp. 19–22.
4. Kurdyumov, A.B., Oleinik, G.S., Ostrovskaya, N.F., et al., Special features of crystalline structure and thermostability of boron nitride wurtzitic modification, Poroshkovaya Metallurgiya, 1985, no. 4, pp. 86–93.
5. Kurdyumov, A.V., Pilipenko, V.A., and Dzhamarov, C.C., Structural variation in the process of the wurtzite-sphalerite phase transition in boron nitride at high pressures and temperatures, High Pres. Phys. Techn., 1980, no. 2, pp. 29–31.
6. Kurdyumov, A.V., Dzhamarov, C.C., and Balan, T.P., Regularities of the transformation of the boron nitride wurtzitic modification into graphite-like at high pressures, J. Superhard Mater., 1986, vol. 8, no. 3, pp. 3–7.
7. Volkogon, V.M., To the question of the structural mechanism of the wBN-cBN phase transformation, in Vysoki technologii v mashinobuduvanni (High technologies in machine-building), collect. sci. papers of KhDPU, Kharkiv, 1999, pp. 53–58.
8. Volkogon, V.M., Oleinik, G.S., Avramchuk, S.K., Osipov, A.S., Kravchuk, A.V., and Balan, T.P., Kinetics of compacting and phase transformations in high-pressure sintering of wurtzitic boron nitride powders deformed by rolling, J. Superhard Mater., 2006, vol. 28, no. 4, pp. 53–59.
9. Kurdyumov, A.V., Britun, V.F., Danilenko, A.I., Zelyavskii, V.B., and Volkogon, V.M., Structure of Polycrystals Produced by Sintering Nanocrystalline Powders of Cubic and Wurtzitic Boron Nitrides, Ibid., 2007, vol. 29, no.1, pp. 12–16.10.3103/S1063457607010029 ↗
10. Kurdyumov, A.V., Zelyavskii, V.B., Ostrovskaya, N.F., et al., Special features of quantitative X-ray analysis of powder low-absorption objects with the imperfect structures, Powder Metallurgy and Metal Ceramics, 1998, nos. 11/12, pp.103–109.
11. Samsonov, G.V., Kovtun, V.I., and Dzhamarov, S.S., The prospects of the high pressure application in hot pressing and sintering, in Abstracts of papers III Vsesoyuznoi nauchno-tekhn. Konf., po Goryachemy pressovaniu v poroshkovoi metallurgii (Hot pressing in powder metallurgy), the III All-Union Science and Technology Conf., Novocherkassk, 1976, p. 5.