L Geng, J. Zhang/ Materials Chemistry and Physics 84(2004)243-246 Based on the explanation of the formation of the HCP Acknowledgements diffraction patterns in a hexagonal p-SiC whisker, it is initially pointed out that the hexagonal TWS-100 B-SiC The authors acknowledge the financial supports from the whisker is also a single crystal with FCC structure. This National Nature Science Foundation of China under grant conclusion is very important for correctly analyzing the number 50071018 side surface structure of the whisker and understanding the mechanism of the interface bonding in a metal matrix com- osite reinforced by the SiC whisker and a ceramic matrix References composite toughened by the SiC whisker 1]. Geng, S Ochiai, J Q. Hu, C K. Yao, Mater. Sci. Eng. A 246(1998) 2]F. Ye, T.Q. Lei, Y. Zhou, Mater. Sci. Eng. A 281(2000)305 4. Conclusions 3]ZY. Ma, Y.X. Lu, M. Luo, J. Bi, J Mater. Sci. TechnoL. 11(1995) that the hexagonal TWS-100 B-SiC whisker is a single [5]SR Nutt lom Ceram Soc. 71(1988)149 By means of high-resolution TEM observation, it is clear m Ceram. Soc. 67(1984)428 crystal with FCC structure. There are many micro-twins 6Y. Yan, J. Chen, L. Wang, Q. Li, D. Feng, L Cao, C. Yao, Mater. Le.8(1989)305 and stacking faults in the(1 1 1)plane perpendicular to the [7]Q. Liu, K. Wu, L Geng, C.K. Yao, Mater. Sci Eng. A 130(1990) whisker axis. The high density of defects account for the HCP diffraction patterns obtained in the hexagonal B-Sic [8]Jv Milewski, F.D. Gac, J.J. Petrovic, S.R. Skaggs, J Mater. Sci. 20 whiskers (1985)1160246 L. Geng, J. Zhang / Materials Chemistry and Physics 84 (2004) 243–246 Based on the explanation of the formation of the HCP diffraction patterns in a hexagonal
-SiC whisker, it is initially pointed out that the hexagonal TWS-100
-SiC whisker is also a single crystal with FCC structure. This conclusion is very important for correctly analyzing the side surface structure of the whisker and understanding the mechanism of the interface bonding in a metal matrix com￾posite reinforced by the SiC whisker and a ceramic matrix composite toughened by the SiC whisker. 4. Conclusions By means of high-resolution TEM observation, it is clear that the hexagonal TWS-100
-SiC whisker is a single crystal with FCC structure. There are many micro-twins and stacking faults in the (1 1 1) plane perpendicular to the whisker axis. The high density of defects account for the HCP diffraction patterns obtained in the hexagonal
-SiC whiskers. Acknowledgements The authors acknowledge the financial supports from the National Nature Science Foundation of China under grant number 50071018. References [1] L. Geng, S. Ochiai, J.Q. Hu, C.K. Yao, Mater. Sci. Eng. A 246 (1998) 302. [2] F. Ye, T.Q. Lei, Y. Zhou, Mater. Sci. Eng. A 281 (2000) 305. [3] Z.Y. Ma, Y.X. Lu, M. Luo, J. Bi, J. Mater. Sci. Technol. 11 (1995) 291. [4] S.R. Nutt, J. Am. Ceram. Soc. 71 (1988) 149. [5] S.R. Nutt, J. Am. Ceram. Soc. 67 (1984) 428. [6] Y. Yan, J. Chen, L. Wang, Q. Li, D. Feng, L. Cao, C. Yao, Mater. Lett. 8 (1989) 305. [7] Q. Liu, K. Wu, L. Geng, C.K. Yao, Mater. Sci. Eng. A 130 (1990) 113. [8] J.V. Milewski, F.D. Gac, J.J. Petrovic, S.R. Skaggs, J. Mater. Sci. 20 (1985) 1160