The influence of ductile interlayers on the mechanical performance of tungsten nitride coatings

Vieira, M.T.; Ramos, Adriana

doi:10.1016/s0924-0136(99)00235-6

Cited by 26 publications

(9 citation statements)

References 14 publications

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“…Similar results were published also by other authors (e.g. [64,65]). The tribological performance is both dependent on hardness and elastic modulus.…”

Section: Theoretical Aspects In Single Vs Multilayer Deformation -Fesupporting

confidence: 93%

Microscale interpretation of tribological phenomena in Ti/TiN soft-hard multilayer coatings on soft austenite steel substrates

Lackner¹,

Major²,

Kot³

2011

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The mechanical and tribological behavior of physical vapor deposited coatings on soft substrate materials gains increasing interest due to economical and environmental aspects -e.g. substitution of steels by light-weight metals or polymers in transport vehicles. Nevertheless, such soft materials require surface protection against wear in tribological contacts. Single layer hard coatings deposited at room temperature are brittle with a relatively poor adhesion. Therefore, they should be better substituted by tough multilayer coatings of soft-hard material combinations. However, the mechanics of such multilayer coatings with several 10 nm thick bilayer periods is difficult and yet not well described. The presented work tries to fill the gap of knowledge by focusing both on mechanical investigations of hardness, adhesion, and wear and on microscopic elucidation of deformation mechanisms. In the paper 1 µm thick Ti/TiN multilayer stacks were deposited by magnetron sputtering on soft austenitic steel substrates at room temperature to prevent distortion of functional components in future applications. High hardness was found for 8 and 16 bilayer films with modulation ratio Ti:TiN = 1:2 and 1:4. This was attributed (with use of transmission electron microscopy) to stopping the crack propagation in thin Ti layers of the multilayer systems by shear deformation combined with different fracture mechanisms in comparison with that for the TiN single layers (edge cracks at the border of the contact area and ring cracks outside, respectively).

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“…Similar results were published also by other authors (e.g. [64,65]). The tribological performance is both dependent on hardness and elastic modulus.…”

Section: Theoretical Aspects In Single Vs Multilayer Deformation -Fesupporting

confidence: 93%

Microscale interpretation of tribological phenomena in Ti/TiN soft-hard multilayer coatings on soft austenite steel substrates

Lackner¹,

Major²,

Kot³

2011

Bulletin of the Polish Academy of Sciences: Technical Sciences

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“…Current advances in the deposition technologies indicate that multilayer coatings with different composition and excellent physical-mechanical and tribological properties can be produced using PVD and CVD methods [78][79][80][81][82]. Thus, there are many possibilities for modifying the characteristics of multilayer compositions but the synthesis of the coating structure should be carried out with high accuracy [83,84].…”

Section: General Features Of Multilayer Coatingsmentioning

confidence: 99%

Nanocomposite Multilayer Binary Nitride Coatings Based on Transition and Refractory Metals: Structure and Properties

2019

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One area of constant interest in many fields of industry is development of functional multilayer coatings that possess excellent performance characteristics. That is why in our brief review the results of studies of structure and properties of multilayer structures based on binary nitrides of transition or refractory metals obtained by various physical-vapor deposition (PVD) techniques are presented. The influence of substrate temperature, substrate bias voltage, bilayer thickness and interface boundaries on the structure of coatings and their properties, such as hardness, plasticity, wear and corrosion resistance, are discussed in detail. This review may be useful for students and growing community of researchers interested in the synthesis-structure-properties relationship in multilayer coatings based on metal nitrides.

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“…Whilst a full investigation into how the geometry influences the mechanics of a dissimilar material joint is outwith the scope of this paper, the key findings from previous research in relation to this are summarised. In addition to joint geometry, ductile interlayers and functionally graded materials have been developed to reduce the effect of a step change in properties by gradually transitioning between the two parent materials [26][27][28][29].…”

Section: Effect Of Joint Geometrymentioning

confidence: 99%

The metallurgy, mechanics, modelling and assessment of dissimilar material brazed joints

Hamilton

Wood

Galloway

et al. 2013

Journal of Nuclear Materials

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At the heart of any procedure for modelling and assessing the design or failure of dissimilar material brazed joints there must be a basic understanding of the metallurgy and mechanics of the joint. This paper is about developing this understanding and addressing the issues faced with modelling and predicting failure in real dissimilar material brazed joints and the challenges still to be overcome in many cases. An understanding of the key metallurgical features of such joints in relation to finite element modelling is presented in addition to a study of the mechanics and stress state at an abrupt interface between two materials. A discussion is also presented on why elastic singularities do not exist based on a consideration of the assumption of an abrupt change in material properties and plasticity in the vicinity of the joint. In terms of modelling real dissimilar material brazed joints; there are several barriers to accurately capturing the stress state in the region of the joint and across the brazed layer and these are discussed in relation to a metallurgical study of a real dissimilar material brazed joint. However, this does not preclude using a simplified modelling approach with a representative braze layer in design and failure assessment away from the interface. In addition modelling strategies and techniques for assessing the various failure mechanisms of dissimilar material brazed joints are discussed. The findings from this paper are applicable to dissimilar material brazed joints found in a range of applications; however the references listed are primarily focused on work in fusion research and development

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The influence of ductile interlayers on the mechanical performance of tungsten nitride coatings

Cited by 26 publications

References 14 publications

Microscale interpretation of tribological phenomena in Ti/TiN soft-hard multilayer coatings on soft austenite steel substrates

Microscale interpretation of tribological phenomena in Ti/TiN soft-hard multilayer coatings on soft austenite steel substrates

Nanocomposite Multilayer Binary Nitride Coatings Based on Transition and Refractory Metals: Structure and Properties

The metallurgy, mechanics, modelling and assessment of dissimilar material brazed joints

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