将立方氮化硼(cBN)微粉和铝(Al)微粉按照体积比7:3的比例进行混配, 在高温(1300~1500℃)、高压(5.5GPa)条件下进行烧结. 利用X射线衍射分析(XRD)、透射电子显微镜(TEM)以及X射线色散能谱(EDS)对烧结体的物相构成、显微结构以及各组分元素的分布进行了分析. 实验结果表明, 1300℃, Al尚未与cBN反应; 当温度升至1400℃时, Al与cBN反应生成AlN和AlB2; 温度进一步升高至1500℃, 反应产物增多, 产物种类不变. TEM和EDS分析表明, 在反应过程中Al扩散进入cBN的表层, B扩散进入富Al的区域, 生成新相AlN和AlB2.
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.
参考文献
[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. |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%