Browse > Article
http://dx.doi.org/10.3365/KJMM.2011.49.1.032

Die Compaction and Sintering Behavior of Fe Micro-nano-powder Feedstock for Micro-PIM  

You, Woo-Kyung (Department of Metallurgy and Materials Science, Hanyang University)
Choi, Joon-Phil (Department of Metallurgy and Materials Science, Hanyang University)
Lee, Jai-Sung (Department of Metallurgy and Materials Science, Hanyang University)
Publication Information
Korean Journal of Metals and Materials / v.49, no.1, 2011 , pp. 32-39 More about this Journal
Abstract
The present investigation was performed on the die compaction and sintering behavior of Fe micro-nano mixed powder with a mixed binder for powder injection molding. Warm die compaction of the feedstock for simulation of the static injection molding process was conducted using a cylindrical mold of 10 mm diameter at $100^{\circ}C$ under 4MPa. The die compaction of the micro-nanopowder feedstock underwent a uniform molding behavior showing a homogeneous distribution of nanopowders among the micropowders without porosity and distortion. After debinding, the powder compact maintained a uniform structure without crack and distortion, leading to a high green density of 64.2% corresponding to the initial powder loading of 65%. The sintering experiment showed that the micro-nanopowder compact underwent a near full and isotropic densification process during sintering. It was observed that the nanopowders effectively suppressed the growth of micropowder grains during densification process. Conclusively, the use of nanopowder for PIM feedstock might provide a new concept for processing a full density PIM parts with fine microstructure.
Keywords
nanostructured materials; powder processing; microstructure; m-PIM;
Citations & Related Records

Times Cited By SCOPUS : 1
연도 인용수 순위
  • Reference
1 Z. Y. Liu, N. H. Loh, S. B. Tor, K. A. Khor, Y. Murakoshi, R. Maeda, and T. Shimizu, J. Mater. Proc. Tech. 127, 165 (2002).   DOI   ScienceOn
2 G. Fu, N. H. Loh, S. B. Tor, Y. Murakoshi, and R. Maeda, Mater. Des. 25, 729 (2004).   DOI   ScienceOn
3 C. Quinard, T. Barrere, and J. C. Gelin, Powder Tech. 190, 123 (2009).   DOI   ScienceOn
4 K. Nishiyabu, K. Kakishita, and S. Tanaka, Mater. Sci. Forum 534-536, 381 (2007).
5 P. C. Yu, Q. F. Li, J. Y. H. Fuh, T. Li, and P. W. Ho, Microsyst. Technol. 15, 401 (2009).   DOI   ScienceOn
6 E. S. Yoon, J. S. Lee, S. T. Oh, and B. K. Kim, Int. J. Refr. Met. Hard Mater. 20, 201 (2002).   DOI   ScienceOn
7 B. H. Cha, Y. S. Kang, and J. S. Lee, J. Jpn. Soc. Powder Powder Metall. 53, 769 (2006).   DOI   ScienceOn
8 H. Y. Nam, S. K. Kwon, Y. S. Kang, and J. S. Lee, Mater. Sci. Forum 449, 1141 (2004).
9 Y. M. Li, X. Q. Liu, F. H. Luo, and J. L. Yue, Trans. Nonferrous Met. Soc. China 17, 1 (2007).   DOI   ScienceOn
10 Z .Y. Liu, N. H. Loh, S. B. Tor, K. A. Khor, Y. Murakoshi, and R. Maeda, Mater. Lett. 48, 31 (2001).   DOI   ScienceOn
11 G. Aggarwal, S. J. Park, and I. Smid, Int. J. Refr. Met. Hard Mater. 24, 253 (2006).   DOI   ScienceOn
12 W. K. You, J. S. Lee, S. H. Ko, and W. S. Lee, J. Kor. Inst. Met. & Mater. 48, 630 (2010).
13 J. S. Lee, B. H. Cha, and Y. S. Kang, Adv. Eng. Mater. 7, 467 (2005).   DOI   ScienceOn
14 B. Zeep, P. Norajitra, V. Piotter, J. Boehm, R. Ruprecht, and J. Hausselt, Fusion Eng. Des. 82, 2660 (2007).   DOI   ScienceOn
15 P. Suri, S. V. Atre, R. M. German, and J. P. de Souza, Mater. Sci. Eng.(A) 365, 337 (2003).
16 R. M. German, Sintering Theory and Practice, Wiley-Interscience (1996).
17 R. M. German, Powder Metallurgy and Particulate Materials Processing, Metal Powder Industries Federation Princeton, New Jersey (2005).
18 R. M. German, Powder Injection Molding, Metal Powder Industries Federation Princeton, New Jersey (1990).
19 R. M. German, A. Bose, Injection Molding of Metals and Ceramics, Metal Powder Industries Federation Princeton, New Jersey (1997).
20 R. M. German, Particle Packing Characteristics, Metal Powder Industries Federation Princeton, New Jersey (1989).
21 D. A. Porter and K. E. Easterling, Phase Transformations in Metals and Alloys, Champman & Hall, London (1992).