Imperial College London
Dr Richard Chater

DrRichardChater

Faculty of Engineering, Department of Materials

Instrumentation Research Fellow, Surface Analysis
 
 
 
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Contact

 

+44 (0)20 7594 6740r.chater

 
 
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Location

 

LG62ARoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ollivier:2016:10.1016/j.matchar.2016.05.006,
author = {Ollivier, M and Harker, RM and Chater, RJ and Gourlay, C},
doi = {10.1016/j.matchar.2016.05.006},
journal = {Materials Characterization},
pages = {112--121},
title = {Thermal etching of silver: Influence of rolling defects},
url = {http://dx.doi.org/10.1016/j.matchar.2016.05.006},
volume = {118},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Silver is well known to be thermally etched in an oxygen-rich atmosphere and has been extensively studied in the laboratory tounderstand thermal etching and to limit its effect when this material is used as a catalyst. Yet, in many industrial applicationsthe surface of rolled silver sheets is used without particular surface preparation. Here, it is shown by combining FIB-tomography,FIB-SIMS and analytical SEM that the kinetics of thermal etch pitting are significantly faster on rolled Ag surfaces than on polishedsurfaces. This occurs due to range of interacting phenomena including (i) the reaction of subsurface carbon-contamination withdissolved oxygen to form pores that grow to intersect the surface, (ii) surface reconstruction around corrosion pits and surfacescratches, and (iii) sublimation at low pressure and high temperature. A method to identify subsurface pores is developed to showthat the pores have {111} and {100} internal facets and may be filled with a gas coming from the chemical reaction of oxygen andcarbon contamination.
AU  - Ollivier,M
AU  - Harker,RM
AU  - Chater,RJ
AU  - Gourlay,C
DO  - 10.1016/j.matchar.2016.05.006
EP  - 121
PY  - 2016///
SN  - 1044-5803
SP  - 112
TI  - Thermal etching of silver: Influence of rolling defects
T2  - Materials Characterization
UR  - http://dx.doi.org/10.1016/j.matchar.2016.05.006
UR  - http://hdl.handle.net/10044/1/32319
VL  - 118
ER  -
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