Metallurgical and Materials Transactions A

, Volume 49, Issue 11, pp 5535–5545 | Cite as

Nanopowder Effect on Fe Nano/Micro-Bimodal Powder Injection Molding

  • Joo Won Oh
  • Won Sik Lee
  • Seong Jin ParkEmail author


The nano/micro-bimodal powder injection molding (PIM) process takes advantage of nano-PIM. Most studies of the process were performed with bimodal powder feedstocks containing only small amounts of nanoparticles because they focused on properties of the samples with the optimal contents of nanoparticles. This study presents how nanoparticles in bimodal powder affect the PIM process. Five different feedstocks were prepared with the powders containing nanoparticles from 0 to 100 pct. The result demonstrated that a decrease in solids loading was offset by nanoparticle addition due to the bimodal packing effect. The nanoparticles also increased the difficulty of the debinding process. Sintering was conducted at 1173 K (900 °C), at which the highest sintered density could be obtained, with various isothermal holding times. Unlike the density, the hardness did not reveal any dependence on the holding time due to grain growth. From this study, 25 pct was regarded as the optimal content of the nanoparticles in the bimodal powder for the maximum density and hardness.



We acknowledge the financial support from the R&D Convergence Program of the Ministry of Science, ICT and Future Planning (MSIP) and the National Research Council of Science and Technology (NST), Republic of Korea (Grant No. B551179-12-02-00). This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (Grant No. 2011-0030075).


  1. 1.
    R.M. German and A. Bose: Injection Molding of Metals and Ceramics, Metal Powder Industries Federation, Princeton, NJ, 1997, pp. 11–33.Google Scholar
  2. 2.
    L.H. Cheng and K.S. Hwang: Metall. Mater. Trans. A, 2013, vol. 44A, pp. 827–34.CrossRefGoogle Scholar
  3. 3.
    J. Do, H.J. Lee, C. Jeon, D.J. Ha, C.P. Kim, B.J. Lee, S. Lee, and Y.S. Shin: Metall. Mater. Trans. A, 2012, vol. 43A, pp. 2237–50.CrossRefGoogle Scholar
  4. 4.
    I.D. Jung, S. Ha, S.J. Park, D.C. Blaine, R. Bollina, and R.M. German: Metall. Mater. Trans. A, 2016, vol. 47A, pp. 5548–56.CrossRefGoogle Scholar
  5. 5.
    H. Yin, X. Qu, and C. Jia: J. Univ. Sci. Technol. Beijing, 2008, vol. 15, pp. 480–83.CrossRefGoogle Scholar
  6. 6.
    J.S. Han, C.W. Gal, J.H. Kim, and S.J. Park: Ceram. Int., 2016, vol. 42, pp. 9475–81.CrossRefGoogle Scholar
  7. 7.
    G. Wen, P. Cao, B. Gabbitas, D. Zhang, and N. Edmonds: Metall. Mater. Trans. A, 2013, vol. 44A, pp. 1530–47.CrossRefGoogle Scholar
  8. 8.
    S. Supriadi, E.R. Baek, C.J. Choi, and B.T. Lee: J. Mater. Process. Technol., 2007, vols. 187–188, pp. 270–73.CrossRefGoogle Scholar
  9. 9.
    K.H. Kim, B.T. Lee, and C.J. Choi: J. Alloys Compd., 2010, vol. 491, pp. 391–94.CrossRefGoogle Scholar
  10. 10.
    S.J. Son, Y.S. Cho, and C.J. Choi: Rev. Adv. Mater. Sci., 2011, vol. 28, pp. 190–95.Google Scholar
  11. 11.
    J. Rajabi, N. Muhamad, and A.B. Sulong: Microsyst. Technol., 2012, vol. 18, pp. 1941–61.CrossRefGoogle Scholar
  12. 12.
    J.W. Lee, S. Timilsina, G.W. Kim, and J.S. Kim: Powder Technol., 2016, vol. 302, pp. 187–95.CrossRefGoogle Scholar
  13. 13.
    U.M. Attia and J.R. Alcock: J. Micromech. Microeng., 2011, vol. 21, p. 043001.CrossRefGoogle Scholar
  14. 14.
    J.L. Johnson: Met. Powder Rep., 2009, vol. 64, pp. 22–27.CrossRefGoogle Scholar
  15. 15.
    P.C. Yu, Q.F. Li, J.Y.H. Fuh, T. Li, and P.W. Ho: Microsyst. Technol., 2009, vol. 15, pp. 401–06.CrossRefGoogle Scholar
  16. 16.
    J.W. Oh, W.S. Lee, and S.J. Park: Powder Technol., 2017, vol. 311, pp. 18–24.CrossRefGoogle Scholar
  17. 17.
    R. Li, M. Qin, C. Liu, H. Huang, H. Lu, P. Chen, and X. Qu: Int. J. Refract. Met. Hard Mater., 2017, vol. 62, pp. 42–46.CrossRefGoogle Scholar
  18. 18.
    K.H. Kate, R.K. Enneti, V.P. Onbattuvelli, and S.V. Atre: Ceram. Int., 2013, vol. 39, pp. 6887–97.CrossRefGoogle Scholar
  19. 19.
    M. Müller, W. Bauer, and H.J.R. Kleissl: Multi-Material Micro Manufacture, 2005, pp. 1–4.Google Scholar
  20. 20.
    K. Nishiyabu, K. Kakishita, and S. Tanaka: Mater. Sci. Forum, 2007, vols. 534–536, pp. 381–84.CrossRefGoogle Scholar
  21. 21.
    J.P. Choi, G.Y. Lee, J.I. Song, W.S. Lee, and J.S. Lee: Powder Technol., 2015, vol. 279, pp. 196–202.CrossRefGoogle Scholar
  22. 22.
    J.W. Oh, R. Bollina, W.S. Lee, and S.J. Park: Powder Technol., 2016, vol. 302, pp. 168–76.CrossRefGoogle Scholar
  23. 23.
    J. Rajabi, N. Muhamad, A.B. Sulong, A. Fayyaz, and M.R. Raza: Mater. Des., 2014, vol. 63, pp. 223–32.CrossRefGoogle Scholar
  24. 24.
    H. Ferkel and R.J. Hellmig: Nanostruct. Mater., 1999, vol. 11, pp. 617–22.CrossRefGoogle Scholar
  25. 25.
    H.C. Hamaker: Physica, 1937, vol. 4, pp. 1058–72.CrossRefGoogle Scholar
  26. 26.
    R.M. German: Metall. Trans. A, 1992, vol. 23A, pp. 1455–65.CrossRefGoogle Scholar
  27. 27.
    J. Li, Y. Pan, F. Qiu, L. Huang, and J. Guo: Mater. Sci. Eng. A, 2006, vols. 435–436, pp. 611–19.CrossRefGoogle Scholar
  28. 28.
    B.N. Mukund, B. Hausnerova, and T.S. Shivashankar: Powder Technol., 2015, vol. 283, pp. 24–31.CrossRefGoogle Scholar
  29. 29.
    X. Colin and J. Verdu: C. R. Chim., 2006, vol. 9, pp. 1380–95.CrossRefGoogle Scholar
  30. 30.
    S.W. Kim: J. Supercrit. Fluids, 2010, vol. 51, pp. 339–44.CrossRefGoogle Scholar
  31. 31.
    A. Páez-Pavón, A. Jiménez-Morales, T.G. Santos, L. Quintino, and J. M. Torralba: J. Magn. Magn. Mater., 2016, vol. 416, pp. 342–47.CrossRefGoogle Scholar
  32. 32.
    M.H.I. Ibrahim, N. Muhamad, and A.B. Sulong: IJMME, 2009, vol. 4, pp. 1–8.Google Scholar
  33. 33.
    G. Aggarwal, I. Smid, S.J. Park, and R.M. German: Int. J. Refract. Met. H., 2007, vol. 25, pp. 226–36.CrossRefGoogle Scholar
  34. 34.
    S.J. Park, Y. Wu, D.F. Heaney, X. Zou G. Gai, and R.M. German: Metall. Mater. Trans. A, 2009, vol. 40A, pp. 215–22.CrossRefGoogle Scholar
  35. 35.
    M.K. Mani, G. Viola, J.P. Hall, S. Grasso, and M.J. Reece: J. Magn. Magn. Mater., 2015, vol. 382, pp. 202–05.CrossRefGoogle Scholar
  36. 36.
    M.J. O’Hara and I.B. Cutler: Proc. Br. Ceram. Soc., 1969, vol. 12, pp. 145–54.Google Scholar

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH)PohangRepublic of Korea
  2. 2.The Advanced Process and Materials R&D GroupKorea Institute of Industrial Technology (KITECH)IncheonRepublic of Korea

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