Influence of microstructure of tungsten on solid state reaction rate with amorphous carbon film

Plate-type specimens were cut from three different types of tungsten sheets fabricated under distinct rolling and heat treatment conditions in the directions parallel or perpendicular to the rolling planes. Amorphous carbon films were prepared by vacuum deposition on the specimen surfaces. Then, the...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nuclear materials 2005-03, Vol.337-339, p.902-906
Main Authors: Hatano, Y., Takamori, M., Nogita, K., Matsuda, K., Ikeno, S., Watanabe, K.
Format: Article
Language:English
Subjects:
Carbide
Carbon impurities
Co-deposition
Materials properties
Tungsten
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Plate-type specimens were cut from three different types of tungsten sheets fabricated under distinct rolling and heat treatment conditions in the directions parallel or perpendicular to the rolling planes. Amorphous carbon films were prepared by vacuum deposition on the specimen surfaces. Then, the specimens were heated at 1073 K in vacuum, and reaction products were analyzed by means of X-ray diffraction. The carbide formed was W2C and no peak of WC appeared. The growth rate of W2C was independent of the cutting directions of the specimens, although the grain boundary densities at the specimen surfaces were quite different. On the other hand, the rate of W2C growth was dependent on both reduction and heat treatment conditions, and a specimen with higher hardness showed a higher growth rate. By taking account of the observations by a transmission electron microscope, it was concluded that dislocations play important roles in W2C growth.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2004.10.098