Qualitative fracture analysis of Si-C-N hard coatings: interfacial and
triaxiality effect
Abstract
The mechanical properties of hard thin films need meticulous and precise
inspection for their efficient applicability. SiCN hard coatings
deposited on silicon substrates underwent Vickers indentation and
fracture analysis was performed with the help of images of fractured
regions under the microscope. The fractured regions were matched with
geometrical patterns and the mechanism of the occurrence of delaminated
and regions subject to brille failure was studied. Finite Element
Analysis (FEA) were carried out to study the elastic-plastic as well as
ductile to brittle transition in the indentation process. The novel
features in the fracture process identified will add to the knowledge in
the field of fractographic studies of hard coatings. The findings shall
be helpful in fracture analysis of components subject to loading used in
heavy-duty equipment as well as MEMS.