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  4. Sintering and characterization of W–Y and W–Y2O3 materials
 
conference paper

Sintering and characterization of W–Y and W–Y2O3 materials

Veleva, L.  
•
Oksiuta, Z.
•
Vogt, U.
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2009
Fusion Engineering and Design
25th Symposium on Fusion Technology

W-(0.3-2)Y2O3 and W-(0.3-2)Y materials (in wt.%) have been manufactured by conventional powder metallurgy methods including dry mechanical alloying of elemental powders in Ar atmosphere, cold pressing in air using a pressure in the range of 150-250 MPa and sintering at 1800 degrees C either in vacuum or in At atmosphere. The mechanical alloying time was optimized by means of X-ray diffractometry and scanning electron microscopy analyses of the particles. It was found that it should not exceed 15 h, in order to obtain small and homogeneous particle sizes and crystallite sizes and to avoid formation of WC impurities. The density of the sintered specimens was found to increase with Y2O3 and Y contents. The highest density of about 90% was obtained for the W-2Y material, while the highest microhardness of 1790 HV0,2 was measured for the W-2Y(2)O(3) material. Scanning electron microscopy observations revealed that sintering occurred, at least partially, from liquid phase, the amount of the corresponding dense regions increasing with the Y2O3 or Y content. (c) 2008 Published by Elsevier B.V.

  • Details
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Type
conference paper
DOI
10.1016/j.fusengdes.2008.12.001
Web of Science ID

WOS:000268012700174

Author(s)
Veleva, L.  
Oksiuta, Z.
Vogt, U.
Baluc, N.  
Date Issued

2009

Publisher

Elsevier

Published in
Fusion Engineering and Design
Volume

84

Issue

7-11

Start page

1920

End page

1924

Subjects

Tungsten

•

Yttria

•

Yttrium

•

Mechanical alloying

•

Sintering

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CRPP  
SPC  
Event nameEvent placeEvent date
25th Symposium on Fusion Technology

Rostock, Germany

September 15-19, 2008

Available on Infoscience
May 20, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/50248
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