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Mechanical properties of superhard materials synthesised at various pressure–temperature conditions investigated by nanoindentation

Title data

Richter, Asta ; Smith, Roger ; Dubrovinskaia, Natalia ; Mcgee, Edward:
Mechanical properties of superhard materials synthesised at various pressure–temperature conditions investigated by nanoindentation.
In: High Pressure Research. Vol. 26 (2006) Issue 2 . - pp. 99-109.
ISSN 1477-2299
DOI: https://doi.org/10.1080/08957950600765269

Abstract in another language

Nanoindentation is applied to synthetic diamond crystals, a chemical vapour deposition (CVD) grown diamond film and to aggregated diamond nanorods produced by high-pressure compression of fullerite. Characteristic load–displacement curves are used to determine the mechanical properties and to classify these materials. Atomistic simulations have also been carried out. The results show that diamond undergoes a mainly elastic deformation during nanoindentation. Both simulations and experiments show that the force exerted on the indenter varies as the depth raised to the power 1.6. Results for the CVD grown diamond films give smaller hardness values than for the diamond crystals. For the diamond nanorods sample, hardness values lie up to those determined for diamond, whereas the elastic modulus can exceed the diamond value.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Nanoindentation; Elastic modulus; Superhard materials; Computer simulation
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Professur Materialphysik und Technologie bei extremen Bedingungen
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 29 Feb 2016 10:25
Last Modified: 29 Feb 2016 10:25
URI: https://eref.uni-bayreuth.de/id/eprint/31202