Volume 45, No 2, 2023, Pages 340-350

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Elastic-Plastic Properties of hard Cr-Based Nitride Coatings Deposited at Temperatures Below 200°C

Authors:

Vassiliy Chitanov , Ekaterina Zlatareva ,
Lilyana Kolaklieva , Roumen Kakanakov ,
Tetiana Cholakova , Stefan Kolchev , Chavdar Pashinski

DOI: 10.24874/ti.1460.03.23.05

Received: 7 March 2023
Revised: 14 April 2023
Accepted: 13 May 2023
Published: 15 June 2023

Abstract:

Sets of Cr-based hard coatings were prepared via reactive closed field unbalanced magnetron sputtering (CFUBMS). Substrate temperature was kept in range of 150 to 200°C during deposition. Nanohardness (H) and effective modulus of elasticity (E*) of the coatings were examined, using depth-sensing indentation method. In order to present the mechanical properties and predict the tribological behaviour of the prepared coatings ratios H/E* (elasticity index), H3/E*2 (resistance to plastic deformation) and 1/(HE*2) (resistance to crack formation) were calculated and analysed. The results from the combined examination of the research ratios showed that they could be used for classification of the expected wear-resistant properties of Cr-based hard coatings deposited at temperature below 200°C.

Keywords:

Cr-based hard coatings, Elasticity index, Resistance to plastic deformation, Resistance to crack formation