Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Wear Characteristics According of Heat Treatment of Si3N4 with Different Amounts of SiO2 Nano-Colloid

SiO2 나노 콜로이드 량이 다른 Si3N4의 열처리에 따른 마모 특성

  • Ahn, Seok Hwan (Dept. of Mechatronics, Jungwon Univ.) ;
  • Nam, Ki Woo (Dept. of Materials Science and Engineering, Pukyong Nat'l Univ.)
  • 안석환 (중원대학교 메카트로닉스학과) ;
  • 남기우 (부경대학교 재료공학과)
  • Received : 2014.01.28
  • Accepted : 2014.07.15
  • Published : 2014.10.01
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Abstract

This study sintered $Si_3N_4$ with different amounts of $SiO_2$ nano-colloid. The surface of a mirror-polished specimen was coated with $SiO_2$ nano-colloid, and cracks were healed when the specimen was treated at a temperature of 1273 K for 1 h in air. Wear specimen experiments were conducted after heat treatments for 10 min at 1073, 1273, and 1573 K. The heat-treated surface that was coated with the $SiO_2$ nano-colloid was slightly rougher than the noncoated surface. The oxidation state of the surface according to the heat treatment temperature showed no correlation with the surface roughness. Moreover, the friction coefficient, wear loss, and bending strength were not related to the surface roughness. $Si_3N_4$ exhibited an abrasive wear behavior when SKD11 was used as an opponent material. The friction coefficient was proportional to the wear loss, and the bending strength was inversely proportional to the friction coefficient and wear loss. The friction coefficient and wear loss increased with increasing amounts of the $SiO_2$ nanocolloid. In addition, the friction coefficient was slightly increased by increasing the heat treatment temperature.

본 연구는 균열 치유 물질로 알려진 $SiO_2$ 나노 콜로이드의 첨가량을 달리한 $Si_3N_4$를 소결하여, 경면 연마한 시험편 표면에 $SiO_2$ 나노 콜로이드를 코팅하여 1273 K, 공기중에서 1시간 균열치유 처리하였다. 그 후, 마모시험편은 1073, 1273 및 1573 K에서 10분간 열처리하여 시험을 실시하였다. $SiO_2$ 나노 콜로이드를 코팅하여 열처리한 표면은 무코팅 표면보다 약간 거칠게 나타났으며, 열처리 온도에 따라 표면의 산화 정도는 조도와 뚜렷한 상관관계는 가지지 않았다. 그리고 마찰계수, 마모손실 및 굽힘강도는 표면 거칠기와 관계가 없었다. SKD11 상대재에 대하여 연삭마모의 거동을 보였으며, 마찰계수와 마모손실은 비례하였다. 또한, 강도가 클수록 마찰계수가 작고, 마모손실도 작았다. $SiO_2$ 나노 콜로이드 량의 증가에 따라서 마찰계수는 증가하다가 일정하게 되었지만, 마모손실은 증가하였다. 또한 열처리 온도가 증가함에 따라서 마찰계수는 약간 증가하는 경향을 나타내었다.

Keywords

References

  1. Mitomo, M., Nishimura, T. and Tsutsumi, M., 1996, "Crack Healing in Silicon Nitride and Alumina Ceramics," J. Mater. Sci. Lett., Vol. 15, pp. 1976-1978. https://doi.org/10.1007/BF00274354
  2. Zhang, Y. Z., Edwards, L. and Plumbridge, W. J., 1998, "Crack Healing in a Silicon Nitride Ceramic," J. Am. Ceram. Soc., Vol. 81, pp. 1861-1868.
  3. Houjou, K., Ando, K., Liu, S. P. and Sato, S., 2004, Crack-Healing and Oxidation Behavior of Silicon Nitride Ceramics. J. Eur. Ceram. Soc., Vol. 24, pp. 2329-2338. https://doi.org/10.1016/S0955-2219(03)00645-9
  4. Nam, K. W., Park, S. W., Do, J. Y. and Ahn, S. H., 2008, "Cracked-Healing and Bending Strength of $Si_3N_4$ Ceramics," Trans. Korean Soc. Mech. Eng. A, Vol. 32, No. 11, pp. 957-962. https://doi.org/10.3795/KSME-A.2008.32.11.957
  5. Nam, K. W., Park, S. H., Eun, K. K. and Kim, J. S., 2010, "Characterization of Crack Healing of $Si_3N_4$ Ceramics According to Crack Length and Coating Methods" Trans. Korean Soc. Mech. Eng. A, Vol. 34, No. 11, pp. 1715-1720. https://doi.org/10.3795/KSME-A.2010.34.11.1715
  6. Ando, K., Ikeda, T., Sato, S., Yao, F. and Kobayashi, Y., 1998, "A Preliminary Study on Crack Healing Behaviour of $Si_3N_4$/SiC Composite Ceramics," Fatigue Fract. Eng. Mater. Struct., Vol. 21, pp. 119-122.
  7. Ando, K., Takahashi, K., Nakayama, S. and Saito, S., 2002 "Crack-Healing Behavior of $Si_3N_4$/SiC Ceramics Under Cyclic Stress and Resultant Fatigue Strength at the Healing Temperature," J. Am. Ceram. Soc., Vol. 85, pp. 2268-2272. https://doi.org/10.1111/j.1151-2916.2002.tb00446.x
  8. Nam, K. W., Kim, M. K., Kim, H. S., Kim, J. W. and Ahn, S. H., 2006, "Bending Strength of $Si_3N_4$ Monolithic and $Si_3N_4$/SiC Composite Ceramics and Elastic Wave Characteristics by Wavelet Analysis," International Journal of Modern Physics B, Vol. 20, No. 25-27, pp. 4279-4284. https://doi.org/10.1142/S0217979206041227
  9. Nam, K. W., Kim, M. K., Park, S. W., Ahn, S. H. and Kim, J. S.. 2007, "Crack Healing Behavior and Bending Strength of $Si_3N_4$/SiC Composite Ceramics by $SiO_2$ Colloidal," Materials Science and Engineering A, Vol. 471, pp. 102-105. https://doi.org/10.1016/j.msea.2007.03.005
  10. Nam, K. W., Kim, M. K., Park. S. W., Ahn, S. H. and Kim, J. S., 2007, "Crack Healing Behavior and Bending Strength of $Si_3N_4$/SiC Composite Ceramics by $SiO_2$ Colloidal," Materials Science and Engineering A, Vol. 471, Nos. 1-2, pp. 102-105. https://doi.org/10.1016/j.msea.2007.03.005
  11. Nam, K. W., Kim, J. S. and Lee, H. B., 2009, "Room Temperature Strength and Crack Healing Morphology of $Si_3N_4$ Composite Ceramics with $SiO_2$ Colloidal," Trans. Korean Soc. Mech. Eng. A, Vol. 33, No. 7, pp. 652-657. https://doi.org/10.3795/KSME-A.2009.33.7.652
  12. Nam. K.W., Park. S. H. and Kim. J. S., 2009, "Cracked-Healing and the Bending Strength of $Si_3N_4$ Composite Ceramics with $SiO_2$ Additions," Journal of Ceramic Processing Research. Vol. 10, No. 4, pp. 497-501.
  13. Nam, K.W. and Lee, K. C., 2009, "Characterization of High Temperature Strength of $Si_3N_4$ Composite Ceramics according to the Amount of $SiO_2$ Nano Colloidal Added" Trans. Korean Soc. Mech. Eng. A, Vol. 33, pp. 1233-1238. https://doi.org/10.3795/KSME-A.2009.33.11.1233
  14. Nam. K. W. and Kim. J. S., 2010, "Effect of a Colloidal $SiO_2$ Coating to Crack Healing and the Bending Strength of $Si_3N_4$ Ceramics," Journal of Ceramic Processing Research. Vol. 11, No. 1, pp. 20-24.
  15. Nam, K. W., Kim, J. S. and Park, S. W., 2010 "The High Temperature Strength of SiC Ceramics Based on $SiO_2$ Nano-Colloidal Employed" Materials Science and Engineering A, Vol. 527, Issues 21-22, pp. 5400-5404. https://doi.org/10.1016/j.msea.2010.05.055
  16. Nam. K. W., Chung. Y. K., Hwang. S. H., Kim. J. S. and Moon. C. K., 2011, "Tribology of $Si_3N_4$ Ceramics Depending on Amount of Added $SiO_2$ Nanocolloid". Trans. Korean Soc. Mech. Eng. A, Vol. 35 No. 3, pp. 267-272. https://doi.org/10.3795/KSME-A.2011.35.3.267
  17. Nakatani, M., Ando, K. and Houjou, K., 2008, "Oxidation Behaviour of $Si_3N_4/Y_2O_3$ System Ceramics and Effect of Crack-Healing Treatment on Oxidation," Journal of the European Ceramic Society, Vol. 28, pp. 1251-1257. https://doi.org/10.1016/j.jeurceramsoc.2007.10.009