Sintering of tungsten powder with and without tungsten carbide additive by field assisted sintering technology

被引：29

作者：

Chanthapan, S. ^{[2
]}

Kulkarni, A. ^{[3
]}

Singh, J. ^{[1
]}

Haines, C. ^{[4
]}

Kapoor, D. ^{[4
]}

机构：

[1] Penn State Univ, Appl Res Lab, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[3] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA

[4] USA, ARDEC, Picatinny Arsenal, NJ USA

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2012年 / 31卷

关键词：

Field assisted sintering; Spark plasma sintering; Tungsten; Tungsten carbide; Grain growth; GRAIN TUNGSTEN; YTTRIUM-OXIDE;

D O I：

10.1016/j.ijrmhm.2011.09.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tungsten powder (0.6-0.9 mu m) was sintered by field assisted sintering technology (FAST) at various processing conditions. The sample sintered with in-situ hydrogen reduction pretreatment and pulsed electric current during heating showed the lowest amount of oxygen. The maximum relative density achieved was 98.5%, which is from the sample sintered at 2000 degrees C, 85 MPa for 30 min. However, the corresponding sintered grain size was 22.2 mu m. To minimize grain growth. nano tungsten carbide powder (0.1-0.2 mu m) was used as sintering additive. By mixing 5 and 10 vol.% WC with W powder, densification was enhanced and finer grain Size was obtained. Relative density above 99% with grain size around 3 tun was achieved in W-10 vol.% WC sintered at 1700 degrees C, 85 MPa, for 5 min. (C) 2011 Published by Elsevier Ltd.

引用

页码：114 / 120

页数：7

共 14 条

[1] Densification mechanisms in spark plasma sintering of nanocrystalline ceramics [J].

Chaim, Rachman .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 443 (1-2) :25-32

[2]

Cho K., 2006, Tungsten, refractory hardmetals VI : proceedings of the sixth International Conference on Tungsten, Refractory Hardmetals, P161

[3] Processing model for tungsten powders and extension to nanoscale size range [J].

German, RM ;

Ma, J ;

Wang, X ;

Olevsky, E .

POWDER METALLURGY, 2006, 49 (01) :19-27

[4]

Huang WM, 1997, Z METALLKD, V88, P63

[5] The absence of plasma in "spark plasma sintering" [J].

Hulbert, Dustin M. ;

Anders, Andre ;

Dudina, Dina V. ;

Andersson, Joakim ;

Jiang, Dongtao ;

Unuvar, Cosan ;

Anselmi-Tamburini, Umberto ;

Lavernia, Enrique J. ;

Mukherjee, Amiya K. .

JOURNAL OF APPLIED PHYSICS, 2008, 104 (03)

[6] Strength properties of yttrium-oxide-dispersed tungsten alloy [J].

Itoh, Y ;

Ishiwata, Y .

JSME INTERNATIONAL JOURNAL SERIES A-MECHANICS AND MATERIAL ENGINEERING, 1996, 39 (03) :429-434

[7]

Jain M, 2006, INT J POWDER METALL, V42, P53

[8] The effect of yttrium oxide on the sintering behavior and hardness of tungsten [J].

Kim, Youngmoo ;

Hong, Moon-Hee ;

Lee, Sung Ho ;

Kim, Eun-Pyo ;

Lee, Seong ;

Nohl, Joon-Woong .

METALS AND MATERIALS INTERNATIONAL, 2006, 12 (03) :245-248

[9] Fabrication of high temperature oxides dispersion strengthened tungsten composites by spark plasma sintering process [J].

Kim, Youngmoo ;

Lee, Kyong Ho ;

Kim, Eun-Pyo ;

Cheong, Dong-Ik ;

Hong, Soon Hyung .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2009, 27 (05) :842-846

[10] Effects of lower cobalt binder concentrations in sintering of tungsten carbide [J].

Li, Tao ;

Li, Qingfa ;

Fuh, J. Y. H. ;

Yu, Poll Ching ;

Wu, C. C. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 430 (1-2) :113-119

← 1 2 →