Fabrication and Properties of Densified Tungsten by Magnetic Pulse Compaction and Spark Plasma Sintering

Eui Seon Lee; Jongmin Byun; Young-Keun Jeong; Sung-Tag Oh

doi:10.3740/MRSK.2020.30.6.321

All Issue

2020 Vol.30, Issue 6 Preview Page

Fabrication and Properties of Densified Tungsten by Magnetic Pulse Compaction and Spark Plasma Sintering 자기펄스 성형 및 방전 플라즈마 소결 공정으로 제조한 텅스텐 소결체의 특성

June 2020. pp. 321-325

PDF XML

Abstract

The present study demonstrates the effect of magnetic pulse compaction and spark plasma sintering on the microstructure and mechanical property of a sintered W body. The relative density of green specimens prepared by magnetic pulse compaction increases with increase in applied pressure, but when the applied pressure is 3.4 GPa or more, some cracks in the specimen are observed. The pressureless-sintered W shows neck growth between W particles, but there are still many pores. The sintered body fabricated by spark plasma sintering exhibits a relative density of above 90 %, and the specimen sintered at 1,600 °C after magnetic pulse compaction shows the highest density, with a relative density of 93.6 %. Compared to the specimen for which the W powder is directly sintered, the specimen sintered after magnetic pulse compaction shows a smaller crystal grain size, which is explained by the reduced W particle size and microstructure homogenization during the magnetic pulse compaction process. Sintering at 1,600 °C led to the largest Vickers hardness value, but the value is slightly lower than that of the conventional W sintered body, which is attributed mainly to the increased grain size and low sintering density.

Keywords

tungsten

magnetic pulse compaction

spark plasma sintering

properties

References

J. W. Davis, V. R. Barabash, A. Makhankov. L. Plochl and K. T. Slattery, J. Nucl. Mater., 258-263, 308 (1998). 10.1016/S0022-3115(98)00285-2

E. Lassner and W.D. Schubert, Tungsten: Properties, Chemistry, Technology of the Elements, Alloys, and Chemical Compounds, Kluwer Academic/ Plenum Publishers, New York, USA (1999). 10.1007/978-1-4615-4907-9

I. H. Moon, J. S. Kim and Y. L. Kim, J. Less Common Met., 102, 219 (1984). 10.1016/0022-5088(84)90318-7

Z. Z. Fang and H. Wang, Int. Mater. Rev., 53, 326 (2008). 10.1179/174328008X353538

R. M. Raihanuzzaman, J.-W. Song and S.-J. Hong, J. Alloys Compd., 536, S211 (2012). 10.1016/j.jallcom.2011.12.108

J.-H. Kim, I.-H. Oh, J.-H. Lee, S.-K. Hong and H.-K. Park, J. Korean Powder Metall. Inst., 26, 132 (2019) (in Korean). 10.4150/KPMI.2019.26.2.132

E. A. Olevsky, A. A. Bokov, G. S. Boltachev, N. B. Volkov, S. V. Zayats, A. M. Ilyina, A. A. Nozdrin and S. N. Paranin, Acta Mech., 224, 3177 (2013). 10.1007/s00707-013-0939-6

N. Tamari, T. Tanaka, K. Tanaka, I. Kondoh, M. Kawahara and M. Tokita, J. Ceram. Soc. Jpn., 103, 740 (1995). 10.2109/jcersj.103.740

R. W. Heckel, Trans. Metall. Soc. AIME, 221, 671 (1961).

10.

T. E. M. Staab, R. Krause-Rehberg, B. Vetter, B. Kieback, G. Lange and P. Klimanek, J. Phys.: Condens. Matter., 11, 1787 (1999). 10.1088/0953-8984/11/7/010

11.

G. Lee, J. McKittrick, E. Ivanov and E. A. Olevsky, Int. J. Refract. Met. Hard Mater., 61, 22 (2016). 10.1016/j.ijrmhm.2016.07.023

12.

J. K. Lee, S. J. Hong, M. K. Lee and C. K. Rhee, Solid State Phenom., 118, 597 (2006). 10.4028/www.scientific.net/SSP.118.597

13.

H.-S. Kim, J.-G. Lee, C.-K. Rhee, J.-M. Koo and S.-J. Hong, J. Korean Powder Metall. Inst., 18, 411 (2008) (in Korean).

14.

O. El-Atwani, D. V. Quach, M. Efe, P. R. Cantwell, B. Heim, B. Schultz, E. A. Stach, J. R. Groza and J. P. Allain, Mater. Sci. Eng., A, 528, 5670 (2011). 10.1016/j.msea.2011.04.015

Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 30
No :6
Pages :321-325
Received Date : 2020-05-29
Revised Date : 2020-06-04
Accepted Date : 2020-06-12
DOI :https://doi.org/10.3740/MRSK.2020.30.6.321

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

All Issue