Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
권호 표지
DOI QR코드

DOI QR Code

Microstructure Control of Fine-Grained Alumina for Abrasive by Sol-Gel Method

졸-겔법을 이용한 알루미나 연마재용 미세립의 미세구조 제어

  • Yu, Min Woo (Department of Advanced Materials Science & Engineering, Mokpo National University) ;
  • Lee, Sang Jin (Department of Advanced Materials Science & Engineering, Mokpo National University)
  • 유민우 (목포대학교 신소재공학과) ;
  • 이상진 (목포대학교 신소재공학과)
  • Received : 2013.04.30
  • Published : 2014.06.05
⟨ Previous Next ⟩

Abstract

Ceramic abrasives are used widely as grinding materials because of their good wear resistance. In particular, alumina abrasives have other excellent mechanical properties, such as toughness, hardness, and durability. Nevertheless, relatively few studies have been carried out domestically in comparison with research in this field that has been conducted abroad. In this study, a fine-grained alumina abrasive that had a dense microstructure with a needle-type second phase, $SrAl_{12}O_{19}$, was successfully fabricated by impregnating a solution in corporating Sr and Y cations into a porous alumina gel prepared from boehmite sol. The final phase and microstructure as well as the porosity and density of the sintered alumina were dependent on the mixing ratio of Sr and Y nitrates, the concentration of the solution, the sintering temperature, and the heating rate. With a mixing ratio of 1:1 wt% of Sr and Y and above a 10 wt% concentration, a dense and homogeneous microstructure was achieved with needle-type grains with sizes of $1.0-2.0{\mu}m$. A denser microstructure with fine grains and improved hardness were obtained by an ultra-fast sintering process at relatively low sintering temperature of about $1400^{\circ}C$.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. H. Y. Jung, D. S. Kim, S. H. Lee, H. M. Lim, K. Kim, and M. K. Jung, Kor. J. Mater. Res. 22, 643 (2012). https://doi.org/10.3740/MRSK.2012.22.12.643
  2. C. P. Dogan and J. A. Hawk, Wear, 225, 1050 (1999).
  3. Z. P. Xie, J. W. Lu, Y. Huang, and Y. B. Cheng, Mater. Lett. 57, 2501 (2003). https://doi.org/10.1016/S0167-577X(02)01301-0
  4. Z. P. Xie, J. W. Lu, L. C. Gao, W. C. Li, L. H. Xu, and X. D. Wang, Mater. Design, 24, 209 (2003). https://doi.org/10.1016/S0261-3069(02)00147-4
  5. M. Kumagai and G. L. Messing, J. Am. Ceram. Soc. 67, 230 (1984). https://doi.org/10.1111/j.1151-2916.1984.tb19491.x
  6. Z. Xie, L. Gao, W. Li, L. Xu, and X. Wang, Sci. China. Ser. 46, 527 (2003). https://doi.org/10.1360/02ye0181
  7. G. W. Lee and I. J. Shon, Korean J. Met. Mater 51, 95 (2013).
  8. P. K. Chang, J. H. Moon, and J. H. Lee, J. Kor. Ceram. Soc. 34, 519 (1997).
  9. Z. C. Li, Z. H. Li, A. J. Zhang, and Y. M. Zhu, Key Eng. Mat. 368, 691 (2008).
  10. W. Liu, Z. Xie, G. Liu, and X. Yang, J. Am. Ceram. Soc. 94, 3211 (2011). https://doi.org/10.1111/j.1551-2916.2011.04796.x
  11. B. K. Park, K. H. Kim, and N. K. Kim, J. Ceram. Proc. Res. 8, 150 (2007).
  12. H. M. Lee and H. L. Lee, J. Kor. Ceram. Soc. 35, 66 (1998).
  13. J. J. Kingsley and K. C. Patil, Mater. Lett. 6, 427 (1988). https://doi.org/10.1016/0167-577X(88)90045-6
  14. C. P. Alpert, H. M. Cha, S. J. Bennison, and B. Lawn, J. Am. Ceram. Soc. 71, 371 (1988).
  15. J. H. Park, W. J. Lee, and I. S. Kim, J. Kor. Ceram. Soc. 47, 498 (2010). https://doi.org/10.4191/KCERS.2010.47.6.498
  16. M. S. Gok, Int. J. Phys. Sci. 5, 535 (2010).
  17. S. Aball, J. Ceram. Proc. Res. 12, 21 (2011).
  18. D. H. Riu, Y. M. Kong, and H. E. Kim, J. Eur. Ceram. Soc. 20, 1475 (2000). https://doi.org/10.1016/S0955-2219(00)00023-6
  19. A. Celikkaya and T. J. Anderson, U. S. Patent 7,258,707 (2007).
  20. W. P. Wood, KR-A-0036182 (2000).
  21. A. Z. Rosenflanz, A. Celikkaya, and T. J. Anderson, KRA-7001664 (2004).