Use of the microindentation technique for determining interfacial fracture energy

Rosenfeld, L.; Ritter, J. E.; Lardner, T. J.; Lin, Meng

doi:10.1063/1.345363

Cited by 115 publications

(51 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overestimation was also found for sol-gel coatings with thickness of several µms on float glass [12]. To account for this deviation, Malzbender et al [67] treated the delamination occurring between radial cracks as three separate circular clamped plates with deflection at the centre instead of the initial assumption of a clamped circular plate without deflection at centre. Thus the buckling stress and shear stress at interface can be reduced by approximately one third [61] and Malzbender et al [12] obtained reasonable results for interfacial toughness.…”

Section: Models Based On Normal Indentation Techniquesmentioning

confidence: 99%

“…For the adhesive failure of relatively soft films with axisymmetric geometries, Rosenfeld et al [67] proposed a model which relates interfacial fracture toughness to coating hardness H, applied load P, and delamination size c, This assumes that the pressure at the interface is approximately equal to the hardness of the coating, which is reasonable for a soft coating or a sufficiently thick coating on a substrate under the condition that the effect of cracking on the hardness can be ignored. It is easy to use due to its concise formulation, but it tends to considerably overestimate the adhesion depending on the actual coated systems investigated.…”

Section: Models Based On Normal Indentation Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Approaches to investigate delamination and interfacial toughness in coated systems: an overview

Chen¹,

Bull²

2010

J. Phys. D: Appl. Phys.

121

View full text Add to dashboard Cite

The fundamental property which often dictates the performance of a coating is its adhesion to the substrate and thus there are many techniques to measure adhesion. The choice of methods is dependent on many factors such as the mechanical properties of the coating and substrate, the interface properties, the microstructure of the coating/substrate system, residual stress, coating thickness and the intended application. Most tests aim to introduce a stable interfacial crack and make it propagate under controlled conditions and model this process to determine adhesion. The corresponding models are either stress analysis-based or energy-based. With the advent of miniature systems and very thin functional coatings, there is a need for characterization of adhesion at small length scales and some specific tests have been developed which are not appropriate for thicker coatings. Among these, indentation and scratch methods have the widest range of applicability but it is necessary to analyse the failure mechanisms before choosing an appropriate model to extract adhesion parameters. This paper reviews the main quantitative adhesion tests for coatings and highlights the tests which can be used to assess submicrometre coatings and thin films. The paper also highlights the modelling and analysis methods necessary to extract reliable adhesion properties illustrating this with examples for submicrometre coatings on silicon and architectural glass.

show abstract

Section: Models Based On Normal Indentation Techniquesmentioning

confidence: 99%

Section: Models Based On Normal Indentation Techniquesmentioning

confidence: 99%

Approaches to investigate delamination and interfacial toughness in coated systems: an overview

Chen¹,

Bull²

2010

J. Phys. D: Appl. Phys.

121

View full text Add to dashboard Cite

show abstract

“…The fracture toughness of the interface between the substrate and the films has also been obtained from the indentation results based on some existing models. According to the results of Rosenfeld et al,28) the interfacial fracture toughness is linked to the size of the delaminated area and the corresponding indentation load as follows:…”

Section: Mechanical Propertiesmentioning

confidence: 99%

DLC Film Fabricated by a Composite Technique of Unbalanced Magnetron Sputtering and PIII

Chen

Cai

et al. 2002

Mater. Trans.

View full text Add to dashboard Cite

DLC multilayer films were deposited on an AISI 304 stainless steel substrate by the composite technique of unbalanced magnetron sputtering and plasma immersion ion implantation (PIII). Structure characterization was performed on the films by Raman spectroscopy (RS) and Glancing X-ray Diffraction (GXRD). Composition analysis of the surface layer on the implanted substrates was carried out using auger electron spectroscopy (AES). The mechanical properties of the films were evaluated by nanoindentation. The results showed that the Raman spectra were divided into a "D" disordered peak and a "G" graphite peak with the integrated intensity ratio between them (I D /I G ) being 1.30. The implanted carbon penetrated the substrate resulting in complete interfacial mixing. The hardness, elastic modulus, fracture toughness and interfacial fracture toughness of the films were about 19.84 GPa, 190.03 GPa, 3.75 MPa·m 1/2 and 5.68 MPa·m 1/2 respectively. Compared with that of a DLC coating deposited directly by the PIII technique, the interfacial fracture toughness of the multilayer films increased, which is mainly attributed to the interfacial mixing at the interface.

show abstract

“…Only radial and circumferential stresses are used in obtaining fracture energy. (Thouless, 1988;Ritter et al, 1989;Rosenfeld et al, 1990) Figure II Figure III.1. X-ray diffraction data obtained for a bulk PE sample taken with a standard diffractometer at SNL .…”

Section: List Of Figuresmentioning

confidence: 99%

Physical Basis for Interfacial Traction-Separation Models

Moody¹

2002

View full text Add to dashboard Cite

Many weapon components contain interfaces between dissimilar materials where cracks can initiate and cause failure. In recent years many researchers in the fracture community have adopted a cohesive zone model for simulating crack propagation (based upon traction-separation relations) Sandia is implementing this model in its ASCI codes. There is, however, one important obstacle to using a cohesive zone modeling approach. At the present time traction-separation relations are chosen in an ad hoc manner. The goal of the present work is to determine a physical basis for Traction-Separation (T-U)relations. This report presents results of a program aimed at determining the dependence of such relations on adhesive and bulk properties. The work focused on epoxy/solid interfaces, although the approach is applicable to a broad range of materials. Asymmetric double cantilevered beam and free surface film nanoindentation fracture toughness tests were used to generate a unique set of data spanning length scales, applied mode mixities, and yield (plastic) zone constraint. The crucial roles of crack tip plastic zone size and interfacial adhesion were defined by varying epoxy layer thickness and using coupling agents or special self-assembled monolayers in preparing the samples. The nature of the yield zone was probed in collaborative experiments run at the Advanced Photon Source. This work provides an understanding of the major phenomena governing polymer/solid interfacial fracture and identifies the essential features that must be incorporated in a T-U based cohesive zone failure model. We believe that models using physically based T-U relations provide a more accurate and widely applicable description of interface cracking than models using ad hoc relations. Furthermore, these T-U relations provide an essential tool for using models to tailor interface properties to meet design needs.

show abstract

Use of the microindentation technique for determining interfacial fracture energy

Cited by 115 publications

References 12 publications

Approaches to investigate delamination and interfacial toughness in coated systems: an overview

Approaches to investigate delamination and interfacial toughness in coated systems: an overview

DLC Film Fabricated by a Composite Technique of Unbalanced Magnetron Sputtering and PIII

Physical Basis for Interfacial Traction-Separation Models

Contact Info

Product

Resources

About