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Deformation Microstructure of Cold Gas Sprayed Coatings

Published online by Cambridge University Press:  18 March 2011

C. Borchers ,
T. Stoltenhoff ,
F. Gäartner ,
H. Kreye  and
H. Assadi
C. Borchers
Affiliation:
University of the Federal Armed Forces, Dept. Maschinenbau, Hamburg, Germany
T. Stoltenhoff
Affiliation:
University of the Federal Armed Forces, Dept. Maschinenbau, Hamburg, Germany
F. Gäartner
Affiliation:
University of the Federal Armed Forces, Dept. Maschinenbau, Hamburg, Germany
H. Kreye
Affiliation:
University of the Federal Armed Forces, Dept. Maschinenbau, Hamburg, Germany
H. Assadi
Affiliation:
Dept. of Materials Science Engineering, Tarbiat Modarres University, Tehran, Iran
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Abstract

Cold Gas Spraying is a new coating technique, in which the formation of dense, tightly bonded coatings occurs only due to the kinetic energy of high velocity particles of the spray powder. These particles are still in the solid state as they impinge on the substrate. Adiabatic heating after impingement can cause local shear instabilities and jet formation. The local microstructure is strongly dependant on local stress state and temperature rise. A variety of different microstructures is observed by TEM. The results are compared with modelling of the spray process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 673: Symposium P – Dislocations and Deformation Mechanisms in Thin Films and Small Structures , 2001 , P70.1
Copyright
Copyright © Materials Research Society 2001

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References

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