Nano- and Micro-Scale Impact Testing of Hard Coatings: A Review

In this review, the operating principles of the nano-impact test technique are described, compared and contrasted to micro- and macro-scale impact tests. Impact fatigue mechanisms are discussed, and the impact behaviour of three different industrially relevant coating systems has been investigated i...

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Bibliographic Details
Published in:Coatings (Basel) 2022-06, Vol.12 (6), p.793
Main Author: Beake, Ben D.
Format: Article
Language:English
Subjects:
Bearing strength
Bending stresses
Carbon
Coatings
Deformation
Dynamic testing
Fatigue tests
Gas turbine engines
High temperature
Impact tests
Load
Load carrying capacity
Materials
Mechanical properties
Nanotechnology
Protective coatings
Silicon
Simulation
Substrates
Testing
Thin films
Tool steels
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Description
Summary:In this review, the operating principles of the nano-impact test technique are described, compared and contrasted to micro- and macro-scale impact tests. Impact fatigue mechanisms are discussed, and the impact behaviour of three different industrially relevant coating systems has been investigated in detail. The coating systems are (i) ultra-thin hard carbon films on silicon, (ii) DLC on hardened tool steel and (iii) nitrides on WC-Co. The influence of the mechanical properties of the substrate and the load-carrying capacity (H3/E2) of the coating, the use of the test to simulate erosion, studies modelling the nano- and micro-impact test and performing nano- and micro-impact tests at elevated temperature are also discussed.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings12060793