Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-23T18:17:13.725Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructural effect on corrosion of tungsten in SF6 environment

Published online by Cambridge University Press:  10 January 2013

W. Wong-Ng ,
C. S. Choi  and
L. P. Cook
W. Wong-Ng
Affiliation:
Materials Engineering and Science Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
C. S. Choi
Affiliation:
Materials Engineering and Science Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
L. P. Cook
Affiliation:
Materials Engineering and Science Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Get access Rights & Permissions [Opens in a new window]

Abstract

Reaction of tungsten (W) with SF6 has been studied using two types of samples. The first type (type I) consisted of rods fabricated by a drawing process and the second type (type II) consisted of square plates cut from a hot pressed billet. After the corrosion experiments, scanning electron microscopy (SEM) examination of the type I sample indicated the presence of deep pits parallel to the rod axis. X-ray analysis of these rods showed preferred orientation. Pole figure measurement was subsequently conducted to quantify the preferred orientation by using neutron diffraction. A significant orientation effect on the corrosion process was found, possibly originating from the considerable granular elongation parallel with the rod axis produced during the fabrication process. In contrast, the type II sample showed no directional corrosion and insignificant preferred orientation.

Type
Research Article
Information
Powder Diffraction , Volume 10 , Issue 1 , March 1995 , pp. 8 - 12
Copyright
Copyright © Cambridge University Press 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Bunge, H. J. (1992). “Preferred Orientation Analysis in Textured Materials,” Adv. X-ray Analy. 35, 263.Google Scholar
2Choi, C. S., Prask, H. J., and Trevino, S. F. (1979). “Non-destructive investigation of texture by neutron diffraction,” J. Appl. Cryst. 12, 327–331.CrossRefGoogle Scholar
3Kallend, J. S., Kocks, U. F., Rollett, A. D., and Wenk, H. R. (1991). “Operational Texture Analysis,” Mat. Sci. Eng. A 132, 1–11.CrossRefGoogle Scholar
4Matthies, S., Wenk, H.-R., and Vinel, G. W. (1988). “Some Basic Concepts of Texture Analysis and Comparison of Three Methods to Calculate Orientation Distributions from Pole Figures,” J. Appl. Cryst. 21, 285–304.CrossRefGoogle Scholar
5 Powder Diffraction File (PDF), produced by the International Centre for Diffraction Data, Newtown Square, PA 19073.Google Scholar