Mechanical and Tribological Properties Evolution of [Si3N4/Al2O3]n Multilayer Coatings

Multilayer coatings [Si3N4/Al2O3]n have generated great interest due to their intriguing properties which have made them a potential candidate to be implemented in different processes within the food and pharmaceutical industries. Unfortunately, this multilayer system based on [Si3N4/Al2O3]n does no...

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Bibliographic Details
Published in:Tribology in industry 2021, Vol.43 (1), p.23-39
Main Authors: Ortiz, C.H., Hernandez-Rengifo, E., Guerrero, A., Aperador, W., Caicedo, J.C.
Format: Article
Language:English
Subjects:
Alumina-Silicon nitride
Aluminum oxide
Bilayers
Coefficient of friction
Crack propagation
Evolution
Food
Friction
friction coefficient
lubricated tribological properties
Mechanical properties
Modulus of elasticity
multilayer coatings
Multilayers
Pharmaceutical industry
Pharmaceuticals
physical vapor deposition pvd
Powder metallurgy
Protective coatings
Radiation
Silicon nitride
Tribology
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Summary:Multilayer coatings [Si3N4/Al2O3]n have generated great interest due to their intriguing properties which have made them a potential candidate to be implemented in different processes within the food and pharmaceutical industries. Unfortunately, this multilayer system based on [Si3N4/Al2O3]n does not have strong tribological studies that could express in an emphatic way its own tribological characteristics. For this reason, the aim of this research consisted of a detailed study of the evolution of the mechanical and tribological properties of the [Si3N4/Al2O3]n coatings as a function of the bilayer number n=1, 10, 30 and 70, with special emphasis on the tribological analysis in a dry and lubricated environment. It was determined that the mechanical properties such as the hardness and the elastic modulus increased by 29% and 6.3%, while the friction coefficient in a dry and lubricated environment decreased by 33% and 81.8%, respectively, when increasing the bilayers from n=1 to n=70. Thus, the present study determined that the coating [Si3N4/Al2O3]70 presented ideal properties that make it a promising candidate to be implemented as a protective coating on processing devices within the food and pharmaceutical industry.
ISSN:0354-8996
2217-7965
DOI:10.24874/ti.952.08.20.01