Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-22T19:53:12.742Z Has data issue: false hasContentIssue false
  • English
  • Français

Stacking Faults Created by Mechanical Milling in Nanostructured WC-Co Composite Powder

Published online by Cambridge University Press:  14 March 2011

Yang Zhimin ,
Mao Changhui ,
Du Jun ,
Michel Daniel ,
Champion Yannick ,
Hagège Serge  and
Hÿtch Martin
Yang Zhimin
Affiliation:
General Research Institute for Non-ferrous Metals, Beijing 100088, P. R. China
Mao Changhui
Affiliation:
General Research Institute for Non-ferrous Metals, Beijing 100088, P. R. China
Du Jun
Affiliation:
General Research Institute for Non-ferrous Metals, Beijing 100088, P. R. China
Michel Daniel
Affiliation:
Centre d'Etudes de Chimie Métallurgique / CNRS, 94407 Vitry-sur-Seine, France
Champion Yannick
Affiliation:
Centre d'Etudes de Chimie Métallurgique / CNRS, 94407 Vitry-sur-Seine, France
Hagège Serge
Affiliation:
Centre d'Etudes de Chimie Métallurgique / CNRS, 94407 Vitry-sur-Seine, France
Hÿtch Martin
Affiliation:
Centre d'Etudes de Chimie Métallurgique / CNRS, 94407 Vitry-sur-Seine, France
Get access

Abstract

Nanostructured WC-Co powders obtained by mechanical milling were investigated by combination of X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) techniques. HRTEM image analysis shows that in the as-milled nanostructured powder, many WC grains contain stacking faults lying on the plane{10.0}. Analysis of phase images showed that these defects were nearly periodically ordered along the [10.0] direction. Based on these observations, a structural model is proposed for the WC grains with ordered stacking faults, which is in fact equivalent to a superstructure of WC with space group Amm2. When this model is introduced together with the normal WC structure (space group P6m2) into the Rietveld refinement, a much better agreement between the calculated and experimental XRD profiles is obtained. This study allowed obtaining the lattice parameters, grain size, microstrain and other structural information on the as-milled powders.

Keywords

structural propertiesmechanical millingWC-Co
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 634: Symposium B – Structure and Mechanical Properties of Nanophase Materials-Theory & Computer Simulations vs. Experiment , 2000 , B8.7.1
Copyright
Copyright © Materials Research Society 2001

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

REFERENCES

1 Suryanarayana, C, International Materials Reviews, 40, 41(1995).Google Scholar
2 Mao C, H, Du, J, Champion, Y, Hagège, S, Michel, D, 6th Conf and Exhib of the Eur. Ceram. Soc, British Ceramic Proceedings n°60, vol. 1, 399(1999).Google Scholar
3 Langford J, I, Accuracy in Powder Diffraction II, NIST Special Publication N° 846, ed. Prince, E. & Stalick, K.A., Gaithersburg, MA (1992), 110.Google Scholar
4 Ungar, T., Borbèly, A., Goren-Muginstein, G. R., Berger, S. and Rosen, A.R., Nanostructured Materials, 11, 103(1999).Google Scholar
5 Langford, J.I; Louër, D and Scardi, P, J. Appl. Cryst. 33, 964(2000).Google Scholar
6 Rodriguez-Carvajal, J., Reference Guide for the Computer Program Fullprof, Laboratoire Lèon Brillouin, CEA-CNRS, Saclay (France)Google Scholar
7 Hagège, S, PhD Thesis, University of Caen, 1980.Google Scholar
8 Hÿtch, M J, Potez, L, Phil. Mag. A76, 1119(1997).Google Scholar