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Enhanced performance (corrosion and mechanical integrity) of hard material substrates by means of PVD AlCrSiN coatings and ion implantation

Type of activity
Competitive project
Acronym
HardProtect
Funding entity
AGENCIA ESTATAL DE INVESTIGACION
Funding entity code
PGC2018-096855-B-C41
Amount
133.100,00 €
Start date
2019-01-01
End date
2021-12-31
Keywords
coatings, fractura, fracture, hard materials, implantación de iones, ion implantation, materiales duros, mechanics, micromechanics, micromecánica, modelling, nanoindentación, nanoindentation, pvd, recubrimientos, simulación, tribocorrosion, tribocorrosión
Abstract
Because of the complex microstructure that coated hard materials possess both in terms of substrate and coating, as well as the
interrelationship between them, it is necessary to understand the mechanical behaviour at different length scales. In this proposal coated
hard materials will be tested using contact loads to measure the response of the material at large length scales, and using
micromechanical techniques to test individual phases and constituents of the material, as grains, phases, interfaces and coatings at low
length scales. Numerical simulations on the microstructural level will be performed to understand causes of failure and optimize
microstructure and deposition processes of coatings.
Both AlCrSiN coatings and multilayer AlCrSiN/AlCrON coatings will be tested on cBN and hardmetal substrates, as well as on corroded
samples.
Contact mechanics will be done by Hertzian tests, with a sphere or a few millimetres pressed against the material of interest. A novel
printed electronics approach will be used to monitor the onset of fracture.
Small-scale behaviour of coatings and substrates will be measured by nanoindentation and microsamples. These samples will be made by
focused ion beam and they will be principally be microcantilevers and micropillars of a few microns in size. This testing will allow to acquire
mechanical properties of selected individual microstructural features, such as grains, interfaces or coatings. Main properties to measure
will be hardness, Youngs modulus, yield, strength and fracture toughness.
With this data, finite element modelling will be performed using realistic meshes obtained after focused ion beam tomography of relevant
microstructures. The model will be calibrated against micropillar testing. Afterwards, a constitutive model will be proposed, and calibrated
against Hertzian tests. Data will be used to modify the deposition parameters of the coating. In this way, understanding of failure at
different length scales as well as prediction of optimal coating/substrate microstructures by modelling will allow enhanced coated hard
materials.
Scope
Adm. Estat
Plan
Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020
Call year
2019
Funcding program
Programa Estatal de Generación de Conocimiento y Fortalecimiento Científico y Tecnológico del Sistema de I+D+i
Funding subprogram
Subprograma Estatal de Generación de Conocimiento
Funding call
Proyectos de I+D de generación de conocimiento (antigues EXC)
Grant institution
Agencia Estatal De Investigacion

Participants