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Preparation of in Situ Cu-Nb Composite Sheet and Wire for Tem Analysis

Published online by Cambridge University Press:  21 February 2011

C. L. Trybus ,
F. C. Laabs ,
A. R. Pelton  and
V. A. Spitzig
C. L. Trybus
Affiliation:
Ames Laboratory USDOE, Iowa State University, Ames, IA 50011
F. C. Laabs
Affiliation:
Ames Laboratory USDOE, Iowa State University, Ames, IA 50011
A. R. Pelton
Affiliation:
Ames Laboratory USDOE, Iowa State University, Ames, IA 50011
V. A. Spitzig
Affiliation:
Ames Laboratory USDOE, Iowa State University, Ames, IA 50011
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Abstract

Cu-Nb in situ composites attain anomolous increases in strength upon mechanical deformation. The unique filamentary microstructures that evolve during processing (cold rolling and/or wire drawing) are the source of the strengthening. Results from transmission electron microscopy characterization studies have played a key role in the understanding of the relationships between structure and properties. However, the fabrication of reliable TEM samples has been extremely challenging for the following reasons: (1) traditional electrochemical techniques are not suitable for the two-phase microstructure, (2) preparation of longitudinal and transverse sections of fine (∼150 μm diameter wires) and thin (∼60 μm thick) sheet is tedious, and (3) it is necessary to avoid excessive heat (< 30°C) during sample preparation to preserve the metastable structural arrangements. This paper will review the procedures used to prepare TEM specimens from bulk wire and sheet samples as well as from extracted Nb filaments. Proper techniques for plating, mounting, sectioning, polishing, and ion-thinning will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 115: Symposium W – Specimen Preparation for Transmission Electron Microscopy of Materials I , 1987 , 235
Copyright
Copyright © Materials Research Society 1988

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References

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