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Indentation behaviour of superelastic hard carbon
Baikov Institute of Metallurgy and Materials Science RAS, Moscow.
Baikov Institute of Metallurgy and Materials Science RAS, Moscow.
Baikov Institute of Metallurgy and Materials Science RAS, Moscow.
Moscow State Industrial University, Moscow.
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Number of Authors: 7
2016 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 96, no 32-34, 3451-3460 p.Article in journal (Refereed) Published
Abstract [en]

Superelastic hard carbon particles widely varying in structure andproperties have been studied by instrumented microindentationtechnique. The carbon particles up to 200 μm in size were producedby fullerene collapse upon high-pressure high-temperature treatmentof metal–fullerene powder mixture with simultaneous sintering ofmetal matrix composite materials (CM) reinforced by the particles.The structure and properties of the carbon particles were controlledby changing synthesis parameters and the state (composition andstructure) of the parent fullerite crystals. The specific features of theinstrumented indentation behaviour of the particles were studied asa function of their hardness. Mechanical properties of the particlestested at loads of up to 1970 mN exhibit an indentation size effect,which becomes more pronounced with increasing hardness of thecarbon particles. Upon holding at a constant load, the fullerenederivedcarbon particles undergo unrecoverable deformation, and theindentation creep CIT increases with increasing particle hardness. Anincrease in hardness of the reinforcing carbon particles substantiallyimproves the wear resistance of the CM and decreases their frictioncoefficient.

Place, publisher, year, edition, pages
2016. Vol. 96, no 32-34, 3451-3460 p.
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Experimental physics
URN: urn:nbn:se:ltu:diva-59920DOI: 10.1080/14786435.2016.1235802ISI: 000388738500010ScopusID: 2-s2.0-84991278469OAI: diva2:1039583

Validerad; 2016; Nivå 2; 2016-11-21(andbra)

Available from: 2016-10-24 Created: 2016-10-24 Last updated: 2016-12-29Bibliographically approved

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