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Fracture and cracking in coatings

Gee, M; Fry, T; Jones, H; Green, C; Roach, T (2022) Fracture and cracking in coatings. NPL Report. MAT 103

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This report describes work that illustrates different microstructural characterisation approaches to the examination of fracture and cracking of coatings and engineered surfaces when subjected to mechanical loading. The methods that were used to apply the mechanical loading were sliding wear, scratch testing and Rockwell (Mercedes) indentation. Both optical and SEM based microscopy methods were used with a particular focus on 3D SEM-FIB as a way of assessing the sub-surface damage from deformation.

It was found that the use of both optical and SEM based techniques when combined with other measurements about the response of the materials such as friction and overall deformation gave a better understanding of behaviour. 3D-FIB revealed some very complex behaviour for the failure of coated and surface engineered materials when scratched.

Item Type: Report/Guide (NPL Report)
NPL Report No.: MAT 103
Subjects: Advanced Materials > Surface Engineering
Divisions: Engineering
Identification number/DOI: 10.47120/npl.MAT103
Last Modified: 27 May 2022 13:44
URI: http://eprintspublications.npl.co.uk/id/eprint/9454

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