DOI QR코드

DOI QR Code

TiC-Nb 소결 복합재료의 연성-취성 천이 특성

Ductile-Brittle Transition Property of Sintered TiC-Nb Composites

  • 신순기 (강원대학교 신소재공학과)
  • Shin, Soon-Gi (Department of Advanced Materials Engineering, College of Samcheok, Kangwon National University)
  • 투고 : 2013.10.29
  • 심사 : 2013.12.04
  • 발행 : 2014.01.27

초록

In order to clarify the effect of Nb addition on the ductile-brittle transition property of sintered TiC, TiC-10 mol% Nb composites were researched using a three-point bending test at temperatures from room temperature to 2020 K, and the fracture surface was observed by scanning electron microscopy. It was found that the Nb addition decreases the ductile-brittle transition temperature of sintered TiC by 300 K and increases the ductility. The room temperature bending strength was maintained at up to 1800 K, but drastically dropped at higher temperatures in pure TiC. The strength increased moderately to a value of 320MPa at 1600 K in TiC-10 mol% Nb composites, which is 40% of the room temperature strength. Pores were observed in both the grains and the grain boundaries. It can be seen that, as Nb was added, the size of the grain decreased. The ductile-brittle transition temperature in TiC-10 mol% Nb composites was determined to be 1550 K. Above 1970 K, yieldpoint behavior was observed. When the grain boundary and cleavage strengths exceed the yield strength, plastic deformation is observed at about the same stress level in bending as in compression. The effect of Nb addition is discussed from the viewpoint of ability for plastic deformation.

키워드

참고문헌

  1. N. Shinya, Frontirers of next-generation structural materials-impact on society and industry-, p. 1-14, cmcbooks, Tokyo (2008).
  2. S. G. Shin, Ph. D. Thesis (in Japanese), p.1-39, University of Tokyo, Tokyo (1992).
  3. H. Suzuki and K. Hayashi, Cemented carbide and sintered hard materials (ed. H. Suzuki), p. 70-165, Maruzen, Tokyo (1986).
  4. M. Takada, H. Matsubara, S. G. Shin, T. Mitsuoka and H. Yanagida, J. Ceram. Soc. Jpn., 108(4), 397 (2000). https://doi.org/10.2109/jcersj.108.1256_397
  5. I. Miyake and T. Teruyoshi, Cemented carbide and sintered hard materials (ed. H. Suzuki), p. 307-370, Maruzen, Tokyo (1986).
  6. B. D. Miracle and H. A. Lipsitt, J. Am. Ceram. Soc., 66(8), 592 (1983). https://doi.org/10.1111/j.1151-2916.1983.tb10098.x
  7. A. P. Katz, H. A. Lipsitt, T. Mah and M. G. Mendiratta, J. Mater. Sci., 18, 1983 (1983). https://doi.org/10.1007/BF00554991
  8. G. Das, K. S. Mazdiyasni and H. A. Lipsitt, J. Am. Ceram. Soc., 65, 104 (1982). https://doi.org/10.1111/j.1151-2916.1982.tb10366.x
  9. H. Kurisita, R. Matsubara, Z. Siriishi and H. Yoshinaga, Trans JIM, 27, 858 (1986). https://doi.org/10.2320/matertrans1960.27.858
  10. S. Tsurekawa, K. Nakashima, K. Murata, H. Kurisita and H. Yoshinaga, J. Jpn. Inst. Met., 55, 390 (1991). https://doi.org/10.2320/jinstmet1952.55.4_390
  11. W. S. Williams, Trans. Met. Soc. AIME, 236, 211 (1996).
  12. Y. M. Kim, S. G. Shin, S. K. Kim, J. H. Park and J. H. Lee, 2005 Spring Conference Abstracts, p. 78, Kor. Inst. Met. Mater., Seoul (2005).
  13. S. G. Shin, Kor. J. Met. Mater., 51(7), 515 (2013).
  14. H. Kurisita, K. Nakazima and H. Yoshinaga, Mater. Sci. Eng., 54, 177 (1982). https://doi.org/10.1016/0025-5416(82)90112-4
  15. I. C. Lee, Ph. D. Thesis (in Japanese), p. 113-129, University of Tokyo, Tokyo (1994).
  16. V. M. Sura and D. L. Kohlstedt, J. Mater. Sci., 21, 2356 (1986). https://doi.org/10.1007/BF01114279

피인용 문헌

  1. Deformation Property of TiC-Mo Solid Solution Single Crystal at High Temperature by Compression Test vol.24, pp.11, 2014, https://doi.org/10.3740/MRSK.2014.24.11.625