Polycrystalline cubic boron nitride (PcBN) samples were obtained by sintering cBN and aluminum micro-powders in volume ratio of 7:3 at high temperature (1300--1500℃) and high pressure (5.5GPa). The identification and the morphology of phases, and the distribution of elements in PcBN samples were studied by using X-ray diffraction (XRD), transmission electron microscope (TEM), selected-area electron diffraction (SAED), and energy dispersive X-ray spectrometry (EDS). Results show that Al does not react with cBN at 1300℃. When the temperature is increased to 1400℃, Al can react with cBN to form AlN and AlB2, and the temperature is increased to 1500℃, the amount of products increases. TEM and EDS analyzing results indicate that Al atoms diffuse into surface layer of cBN particle, and B atoms diffuse into Al zone, forming new phases AlN and AlB2.
ZHAO Yu-Cheng
,
WANG Ming-Zhi
. Interaction of Al and cBN under High Temperature and High Pressure[J]. Journal of Inorganic Materials, 2008
, 23(2)
: 253
-256
.
DOI: 10.3724/SP.J.1077.2008.00253
[1] Kopac J, Krajnik P. Journal of Materials Processing Technology, 2006, 175 (1-3): 278--284.
[2] Kato Hideharu, Shintani Kazuhiro, Sumiya Hitoshi. Journal of Materials Processing Technology, 2002, 127 (2): 217--221.
[3] Liu X L, Wen D H, Li Z J, et al. Journal of Materials Processing Technology, 2002, 129 (1-3): 200--206.
[4] Neo K S, Rahman M, Li X P, et al. Journal of Materials Processing Technology, 2003, 140 (1-3): 326--331.
[5] Casanova C A M, Balzaretti N M, Voronin G, et al. Diamond and Related Materials, 1999, 8 (8-9): 1451--1454.
[6] Benko Ewa, Stanislaw Jan Skrzypek, Krolicka Bogna, et al. Diamond and Related Materials, 1999, 8 (10): 1838--1846.
[7] Klimczyk P, Benko E, Lawniczak-Jablonska K, et al. Journal of Alloys and Compounds, 2004, 382 (1-2): 195--205.
[8] Rong X Z, Tsurumi Takaaki, Fukunaga Osamu, et al. Diamond and Related Materials, 2002, 11 (2): 280--286.
[9] Benko E, Klimczyk P, Morgiel J, et al. Materials Chemistry and Physics, 2003, 81 (2-3): 336--340.
[10] Faran Eilon, Gotman Irena, Gutmanas Elazar Y. Materials Science and Engineering A, 2000, 288 (1): 66--74.
[11] Benko E. In Proc. World Ceramic Congress. ed. P. Vincenzini. Techna, Firenze, 1995. 1430--1434.
[12] Du Y J, Li S Y, Zhang K, et al. Scripta Materialia, 1997, 36 (1): 7--14.
