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Title: HNBR Elastomer Composite with Zero Thermal Contraction over a Range of Temperatures
Authors: Akulichev, A. G.
Alcock, B.
Protasov, A.
Markin, P.
Echtermeyer, A. T.
Issue Date: 2019
Publisher: Elsevier Ltd
Elsevier BV
Citation: HNBR Elastomer Composite with Zero Thermal Contraction over a Range of Temperatures / A. G. Akulichev, B. Alcock, A. Protasov et al. // Composites Communications. — 2019. — Vol. 15. — P. 76-79.
Abstract: Elastomers such as hydrogenated nitrile butadiene rubber (HNBR) are known to have inferior dimensional stability upon temperature changes compared to metallic materials. This can result in thermal contraction mismatches between metal and elastomer sealing components during cooling, possibly leading to seal leakage. It has also been reported that MnCoGe alloys have been developed that undergo a phase change which results in a volumetric expansion during cooling through the phase change temperature region. This article reports the effect of adding MnCoGe-alloy particles into a HNBR elastomer with the purpose using the thermal expansion of the alloy particles to counteract the thermal contraction of this elastomer during cooling. The composite material is produced using a combination of solvent casting and traditional shear mixing in a two-roll mill followed by compression moulding. With the MnCoGe volume fraction of ≈ 17%, a considerable suppression of the thermal expansion coefficient of the base elastomer was achieved, going from 185×10−6 °C−1 to nearly zero in the range of temperatures from -5 °C to +15 °C. The positive effect of the filler on the thermal expansivity was apparent in wider temperature range of -20 to +40 °C. © 2019 Elsevier Ltd.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85068152003
PURE ID: 10009041
ISSN: 2452-2139
metadata.dc.description.sponsorship: This work was supported by the Research Council of Norway (Project 234115 in the Petromaks2 programme), FMC Kongsberg Subsea AS and STATOIL Petroleum AS, with the research partners Norwegian University of Science and Technology and SINTEF Materials and Chemistry. This work was also supported by the state assignment of FASO Russia [topic ”Magnet” No. AAAA-A18-118020290129-5 ].
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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