Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Mechanical Property Evaluation of WC-Co-B4C Hard Materials by a Spark Plasma Sintering Process

방전플라즈마 소결 공정을 이용한 WC-Co-B4C 소재의 기계적 특성평가

  • Lee, Jeong-Han (Korea Institute of Industrial Technology (KITECH), Smart Mobility Materials and Components R&D Group) ;
  • Park, Hyun-Kuk (Korea Institute of Industrial Technology (KITECH), Smart Mobility Materials and Components R&D Group)
  • 이정한 (한국생산기술연구원 스마트모빌리티소재부품연구그룹) ;
  • 박현국 (한국생산기술연구원 스마트모빌리티소재부품연구그룹)
  • Received : 2021.05.17
  • Accepted : 2021.06.21
  • Published : 2021.07.27
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Abstract

In this study, binderless-WC, WC-6 wt%Co, WC-6wt% 1 and 2.5 B4C materials are fabricated by spark plasma sintering process (SPS process). Each fabricated WC material is almost completely dense, with a relative density up to 99.5 % after the simultaneous application of pressure of 60 MPa. The WC added Co and Co-B4C materials resulted in crystalline growth. The WC with HCP crystal structure has respective interfacial energy (basal facet direction: 1.07 ~ 1.34 J·m-2, prismatic direction: 1.43 ~ 3.02 J·m-2) that depends on the grain growth direction. It is confirmed that the continuous grain growth, biased by the basal facet, which has relatively low energy, is promoted at the WC/Co interface. As abnormal grain growth takes place, the grain size increases more than twice from 0.37 to 0.8 um. It is found through analysis that the hardness property also greatly decreases from about 2661.4 to 1721.4 kg/mm2, along with the grain growth.

Keywords

Acknowledgement

This study has been conducted with the support of the Korea Institute of Industrial Technology (KITECH), Production Industry Leading Core Technology Development Project as the "Development of an on-site facility attached cryogenic machining integrated system (KITECH EH-21-0014)".

References

  1. H. R. D. Macedo, A. G. P. D. Silva and D. M. A. Melo, Mater. Lett., 57, 3924 (2003). https://doi.org/10.1016/S0167-577X(03)00242-8
  2. T. A. Fabijanic, M. Kurtela, I. Skrinjaric, J. Potschke and M. Mayer, Metals, 10, 224 (2020). https://doi.org/10.3390/met10020224
  3. X. Liu, X. Song, H. Wang, X. Liu, F. Tang and H. Lu, Acta Mater., 149, 164 (2018). https://doi.org/10.1016/j.actamat.2018.02.018
  4. Z. Shen, M. Johnsson, Z. Zhao and M. Nygren, J. Am. Ceram. Soc., 85, 1921 (2002). https://doi.org/10.1111/j.1151-2916.2002.tb00381.x
  5. J. E. Garay, U. A. Tamburini, Z. A. Munir, S. C. Glade and P. A. Kumar, Appl. Phys. Lett., 85, 573 (2004). https://doi.org/10.1063/1.1774268
  6. J. R. Friedman, J. E. Garay, U. A. Tamburini and Z. A. Munir, Intermetallics, 12, 589 (2004). https://doi.org/10.1016/j.intermet.2004.02.005
  7. J. E. Garay, U. A. Tamburini and Z. A. Munir, Acta Mater., 51, 4487 (2003). https://doi.org/10.1016/S1359-6454(03)00284-2
  8. J. H. Lee, I. H. Oh, J. H. Jang, S. K. Hong and H. K. Park, J. Alloys Compd., 786, 1 (2019). https://doi.org/10.1016/j.jallcom.2019.01.282
  9. H. K. Park, J. H. Lee, J. H. Jang and I. H. Oh, Korean J. Met. Mater., 5, 304 (2019).
  10. K. Jia, T. E. Fischer and G. Gallois, Nanostructured Mater., 10, 875 (1998). https://doi.org/10.1016/S0965-9773(98)00123-8
  11. J. Poetschke, V. Richter, T. Gestrich and A. Michaelis, Int. J. Refract. Met. Hard Mater., 43, 309 (2014). https://doi.org/10.1016/j.ijrmhm.2014.01.001
  12. J. Garcia, V. C. Cipres, A. Blomqvist and B. Kaplan, Int. J. Refract. Met. Hard Mater., 80, 40 (2019). https://doi.org/10.1016/j.ijrmhm.2018.12.004
  13. J. H. Kim, J. H. Lee, J. H. Jang, I. H. Oh, S. K. Hong and H. K. Park, Korean J. Met. Mater., 58, 533 (2020). https://doi.org/10.3365/KJMM.2020.58.8.533
  14. Y. Qian and Z. Zhao, Crystals, 10, 507 (2020). https://doi.org/10.3390/cryst10060507
  15. K. Mannesson, I. Borgh, A. Borgenstam and J. Agren, Int. J. Refract. Met. Hard Mater., 29, 488 (2011). https://doi.org/10.1016/j.ijrmhm.2011.02.008
  16. B. Roebuck and E. A. Almond, Int. Mater. Rev., 33, 90 (1988). https://doi.org/10.1179/imr.1988.33.1.90
  17. H. Tamizifar and A. M. Hadian, Int. J. Mordern Phys., 5, 102 (2012).
  18. G. R. Antis, P. Chantikul, B. R. Lawn and D. B. Marshall, J. Am. Ceram. Soc., 64, 533 (1981). https://doi.org/10.1111/j.1151-2916.1981.tb10320.x