Abstract
Characterization of sintered polycrystalline wurtzitic boron nitride compacts was carried out regarding the different crystalline phases that are formed at high temperature and high pressure, composition, particle size distribution of BN and binder and hardness. Wurtzitic boron nitride, cubic boron nitride, TiC/TiN solid solution, TiB and TiB2 were the crystalline phases that have been observed in sintered wurtzitic boron nitride compacts. The particle size distribution of BN and the binder was found to be comparable (1 to 5μm), with about 80% of the particles lying between 2 and 3μm. Weight percentages of different elements present in these compacts were determined. The average Knoop hardness values under 500 g load were measured, and the variation of hardness as a function of position on the specimen surface was studied.
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References
R. H. Wentorf Jr,J. Chem. Phys.34 (1957) 956.
R. C. Devries andJ. F. Fleischer,J. Cryst. Growth13/14 (1972) 88.
F. P. Bundy andR. H. Wentorf, Jr,J. Chem. Phys.38 (1963) 1144.
T. Endo, O. Fukunaga andM. Iwata,J. Mater. Sci.16 (1981) 2227.
R. H. Wentorf Jr andA. J. De Lai, US Patent No. 3 233 988 (1966).
L. E. Hibbs Jr andR. H. Wentorf Jr,High Temp. high press.6 (1974) 409
O. Fukunaga, T. Endoh, M. Akaishi, T. Oosawa andS. Yamaoka, in Proceedings of International Symposium on Factors in Densification and Sintering of Oxide and Non-oxide ceramics, Tokyo, Japan, 1978, edited by B. Vodar and P. Marteau (Pergamon, Oxford, 1980) p. 328.
S. Saito andA. Sawaoka, in Proceedings of VIIth International AIRAPT Conference, LeCreusot, 1979 p. 541.
B. P. Singh,Mater. Res. Bull.21 (1986) 85.
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Singh, B.P. Characterization of wurtzitic boron nitride compacts. J Mater Sci 22, 495–498 (1987). https://doi.org/10.1007/BF01160759
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DOI: https://doi.org/10.1007/BF01160759