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Title: Corrosion Behavior of Magnetron Sputtered Alpha Ta Coatings on Smooth and Rough Steel Substrates

Abstract

a-Ta coatings on smooth and rough steel substrates (AISI 4340) were studied in an effort to assess the resulting porosity and corrosion behavior. While the long-range crystallographic orientation of the coatings was found to be affected by the surface roughness, the short-range structure was invariant. Peak broadening in X-ray diffraction patterns attributed to microstrain and particle size was observed for coatings on both types of substrates as compared to Ta powder. Although the roughness was two orders of magnitude greater for the coatings deposited on the rough substrates than the smooth ones, the porosity was not significantly different. Furthermore, electrochemical impedance behavior over long exposure times of coatings deposited on smooth and rough steel substrates was similar to that of Ta foil. These results demonstrate that substrate roughness appears to have little to no effect on the coating quality with respect to corrosion performance for 50 {micro}m coatings.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
914123
Report Number(s):
BNL-78691-2007-JA
Journal ID: ISSN 0257-8972; SCTEEJ; TRN: US0801558
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Surf. Coat. Technol.; Journal Volume: 200
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 43 PARTICLE ACCELERATORS; COATINGS; CORROSION; IMPEDANCE; MAGNETRONS; ORIENTATION; PARTICLE SIZE; PERFORMANCE; POROSITY; ROUGHNESS; STEELS; SUBSTRATES; X-RAY DIFFRACTION; NSLS; national synchrotron light source

Citation Formats

Maeng,S., Axe, L., Tyson, T., Gladczuk, L., and Sosnowski, M. Corrosion Behavior of Magnetron Sputtered Alpha Ta Coatings on Smooth and Rough Steel Substrates. United States: N. p., 2006. Web. doi:10.1016/j.surfcoat.2005.08.128.
Maeng,S., Axe, L., Tyson, T., Gladczuk, L., & Sosnowski, M. Corrosion Behavior of Magnetron Sputtered Alpha Ta Coatings on Smooth and Rough Steel Substrates. United States. doi:10.1016/j.surfcoat.2005.08.128.
Maeng,S., Axe, L., Tyson, T., Gladczuk, L., and Sosnowski, M. Sun . "Corrosion Behavior of Magnetron Sputtered Alpha Ta Coatings on Smooth and Rough Steel Substrates". United States. doi:10.1016/j.surfcoat.2005.08.128.
@article{osti_914123,
title = {Corrosion Behavior of Magnetron Sputtered Alpha Ta Coatings on Smooth and Rough Steel Substrates},
author = {Maeng,S. and Axe, L. and Tyson, T. and Gladczuk, L. and Sosnowski, M.},
abstractNote = {a-Ta coatings on smooth and rough steel substrates (AISI 4340) were studied in an effort to assess the resulting porosity and corrosion behavior. While the long-range crystallographic orientation of the coatings was found to be affected by the surface roughness, the short-range structure was invariant. Peak broadening in X-ray diffraction patterns attributed to microstrain and particle size was observed for coatings on both types of substrates as compared to Ta powder. Although the roughness was two orders of magnitude greater for the coatings deposited on the rough substrates than the smooth ones, the porosity was not significantly different. Furthermore, electrochemical impedance behavior over long exposure times of coatings deposited on smooth and rough steel substrates was similar to that of Ta foil. These results demonstrate that substrate roughness appears to have little to no effect on the coating quality with respect to corrosion performance for 50 {micro}m coatings.},
doi = {10.1016/j.surfcoat.2005.08.128},
journal = {Surf. Coat. Technol.},
number = ,
volume = 200,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}