Scratch hardness and deformation maps for polycarbonate and polyethylene

Briscoe, B.J.; Pelillo, E.; Sinha, Sujeet K.

doi:10.1002/pen.10702

Cited by 188 publications

(89 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(2), expresses the fact that the decompression takes place at the rear half of the contact circle. Briscoe et al proposed that for rigid plastic material such as metals q = 2, and for materials such as polymers with high elastic release, q = 1 [38]. In this study, for loads below 25 mN, the elastic release is high and therefore it is assumed that q = 1.…”

Section: Discussionmentioning

confidence: 92%

See 1 more Smart Citation

Deformation mechanisms of silicon during nanoscratching

Gassilloud

Ballif

Gasser

et al. 2005

Physica Status Solidi (a)

113

View full text Add to dashboard Cite

Dedicated to Professor Horst P. Strunk on the occasion of his 65th birthday PACS 62.20Fe, 61.50Ks, 61.43Dq, 63.20Mt, 61.72Ff, 68.37Hk The deformation mechanisms of silicon {001} surfaces during nanoscratching were found to depend strongly on the loading conditions. Nanoscratches with increasing load were performed at 2 µm/s (low velocity) and 100 µm/s (high velocity). The load-penetration-distance curves acquired during the scratching process at low velocity suggests that two deformation regimes can be defined, an elasto-plastic regime at low loads and a fully plastic regime at high loads. High resolution scanning electron microscopy of the damaged location shows that the residual scratch morphologies are strongly influenced by the scratch velocity and the applied load. Micro-Raman spectroscopy shows that after pressure release, the deformed volume inside the nanoscratch is mainly composed of amorphous silicon and Si-XII at low scratch speeds and of amorphous silicon at high speeds. Transmission electron microscopy shows that Si nanocrystals are embedded in an amorphous matrix at low speeds, whereas at high speeds the transformed zone is completely amorphous. Furthermore, the extend of the transformed zone is almost independent of the scratching speed and is delimited by a dislocation rich area that extends about as deep as the contact radius into the surface. To explain the observed phase and defect distribution a contact mechanics based decompression model that takes into account the load, the velocity, the materials properties and the contact radius in scratching is proposed. It shows that the decompression rate is higher at low penetration depth, which is consistent with the observation of amorphous silicon in this case. The stress field under the tip is computed using an elastic contact mechanics model based on Hertz's theory. The model explains the observed shape of the transformed zone and suggests that during load increase, phase transformation takes place prior to dislocation nucleation.

show abstract

Section: Discussionmentioning

confidence: 92%

“…We may explain this behaviour with a simple contact mechanics model. Briscoe et al proposed that the deformation velocity in scratching can be defined as the ratio of the scratching velocity to the scratching width [38,39]:…”

Section: Discussionmentioning

confidence: 99%

Deformation mechanisms of silicon during nanoscratching

Gassilloud

Ballif

Gasser

et al. 2005

Physica Status Solidi (a)

113

View full text Add to dashboard Cite

show abstract

“…Orthogonally intersecting scratches produce protuberances which might be precursor to wear particles. The scratching technique has also been used to produce a number of scratch deformation maps which define a material's surface damage characteristics under different normal loads, strains, scratching speeds and temperatures [28,35].…”

Section: Scratching Of Polymersmentioning

confidence: 99%

“…Based on this concept, two parameters have been defined, scratch hardness (corresponding to the normal) and tangential hardness (corresponding to the frictional force). Thus, we can write [35], Scratch hardness for elastic contact,…”

Section: Scratch Hardness Models 21 Generic Responsesmentioning

confidence: 99%

Scratch Resistance and Localised Damage Characteristics of Polymer Surfaces – a Review

Briscoe

Sinha

2003

Materialwissenschaft Werkst

116

View full text Add to dashboard Cite

The "Scratch Test" is, arguably, the earliest and amongst the now most widely used techniques for evaluating a wide range of surface mechanical properties. Some of the areas where this test has been successfully used in the engineering field, both by research and industry, include the determination of the relative hardness of materials, characterizations of coatings, paints and thin-films, modeling of the wear of materials and the estimation of different material deformation characteristics when subjected to hard asperity damage. In this paper we have reviewed the "state-of-the-art" in the scratch method for polymeric materials. The paper provides some important theoretical models that have been developed in the field of scratching for material property characterizations. Results from different types of scratch tests (macro, micro and nano scales) on a range of polymeric materials are presented with critical discussion on the usefulness of each result. Finally, various areas for further research in scratching of polymer surfaces have been identified.

show abstract

“…Pileup was observed at the scratch location from which the width of the scratch was measured. Scratch hardness H S is given in terms of normal load F AFM applied on the tip of AFM and width of the scratch W S as (Briscoe et al 1996;Williams 1996) …”

Section: Scratch-resistant Epoxy/clay and Epoxy/aluminamentioning

confidence: 99%

Polymer and ceramic nanocomposites for aerospace applications

2017

View full text Add to dashboard Cite

This paper reviews the potential of polymer and ceramic matrix composites for aerospace/space vehicle applications. Special, unique and multifunctional properties arising due to the dispersion of nanoparticles in ceramic and metal matrix are briefly discussed followed by a classification of resulting aerospace applications. The paper presents polymer matrix composites comprising majority of aerospace applications in structures, coating, tribology, structural health monitoring, electromagnetic shielding and shape memory applications. The capabilities of the ceramic matrix nanocomposites to providing the electromagnetic shielding for aircrafts and better tribological properties to suit space environments are discussed. Structural health monitoring capability of ceramic matrix nanocomposite is also discussed. The properties of resulting nanocomposite material with its disadvantages like cost and processing difficulties are discussed. The paper concludes after the discussion of the possible future perspectives and challenges in implementation and further development of polymer and ceramic nanocomposite materials.

show abstract

Scratch hardness and deformation maps for polycarbonate and polyethylene

Cited by 188 publications

References 16 publications

Deformation mechanisms of silicon during nanoscratching

Deformation mechanisms of silicon during nanoscratching

Scratch Resistance and Localised Damage Characteristics of Polymer Surfaces – a Review

Polymer and ceramic nanocomposites for aerospace applications

Contact Info

Product

Resources

About