Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-23T18:08:46.834Z Has data issue: false hasContentIssue false

SPM-based Electrical Characterization of Aged Waspaloy Microstructures

Published online by Cambridge University Press:  01 February 2011

Siva Kumar V. Kelekanjeri G.
Affiliation:
[email protected], Georgia Institute of Technology, School of Materials Science and Engineering, 2025 Peachtree Rd.,, Apt#649,, Atlanta, GA, 30309, United States, 4046431431, 4048949140
Rosario A Gerhardt
Affiliation:
[email protected], Georgia Institute of Technology, School of Materials Science and Engineering, 771 Ferst Drive,, Room 288, Love Bldg.,, Atlanta, GA, 30332-0245, United States
Get access

Abstract

The results of SPM-based localized electrical examination of precipitation hardened Waspaloy microstructures using Electrostatic Force Microscopy (EFM) and Current-Atomic Force Microscopy (I-AFM) are reported herein. The measurements were conducted on two differently etched specimens with the same initial microstructure. Selective etching by preferentially removing the γ′ or the γ phase resulted in a non-uniform surface topography leaving the less reactive phase standing in relief relative to the depressed phase. The presence of a non-uniform surface topography affected the measured EFM response by causing an inhomogeneous surface voltage distribution. A non-linear tip-surface interaction could have further complicated the measured EFM response by making it non-localized. The EFM phase obeyed a supplementary behavior upon reversing the polarity of the DC bias. Using I-AFM, the tip current was found to be the highest at γ-γ′ interphase boundaries, which was attributed to the relaxation of the lattice atoms in the relief zone formed upon etching.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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

1. Kelekanjeri, V. S. K. G. and Gerhardt, R. A. Adv Mater Res 15–17 (2007).Google Scholar
2. Kelekanjeri, V. S. K. G. and Gerhardt, R. A. under review for publication in Acta Materialia (2008).Google Scholar
3. Goken, M., Kempf, M., Bordenet, M. and Vehoff, H. Surface and Interface Analysis 27 (1999).Google Scholar
4. Bonnell, D. A. "Scanning Probe Microscopy and Spectroscopy" (John Wiley & Sons Inc. 2001).Google Scholar
5. Kalinin, S. and Gruverman, A. "Scanning Probe Microscopy: Electrical and Electromechanical Phenomena at the Nanoscale" (Springer 2007).Google Scholar
6."XE-100 User's Manual" (PSIA Inc. 2002).Google Scholar
7."Operating Manual for Electrostatic Force Microscopy, XE Series SPM" (PSIA Inc. 2004).Google Scholar
8."Operating Manual for External I-AFM, XE Series SPM" (PSIA Inc. 2004).Google Scholar
9. Kehl, G. L. "The Principles of Metallographic Laboratory Practice" (McGraw-Hill 1949).Google Scholar