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Unusual changes in the shape of solid parahydrogen with higher than natural isotope content
B. I. Verkin Institute of Low-temperature Physics and Engineering, National Academy of Sciences of Ukraine.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-6877-9282
2016 (English)In: Low temperature physics (Woodbury, N.Y., Print), ISSN 1063-777X, E-ISSN 1090-6517, Vol. 42, no 6, p. 484-490Article in journal (Refereed) Published
Abstract [en]

The relative elongation epsilon of samples of high purity (99.9999 mol. % with respect to nonhydrogenic impurities) parahydrogen (p-H-2, similar to 0.2% o-H-2) with different amounts of the stable hydrogen isotope deuterium is measured as a function of applied stress sigma at temperatures of 1.8-4.2 K. The samples were subjected to uniaxial tension by stepwise loading. The ratio [D]/[H] of the number [D] of deuterium atoms to the number [H] of p-H-2 hydrogen atoms ranged from 0.0055 +/- 0.0005 at. % up to 0.07 at. %. For deuterium enriched p-H-2, the easy slip dislocation stage vanished from the sigma(epsilon) curves and there was a significant reduction in the total relative elongation of the samples, as well as a substantial increase in the hardening coefficient d sigma/d epsilon. Deformation of samples of p-H-2 with deuterium contents higher than the natural amount produces an unusual change in their shape owing to the appearance of a rotational component of the low-temperature plastic mass transfer

Place, publisher, year, edition, pages
2016. Vol. 42, no 6, p. 484-490
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Experimental physics
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URN: urn:nbn:se:ltu:diva-11331DOI: 10.1063/1.4954786ISI: 000379586400009Scopus ID: 2-s2.0-84978289477Local ID: a45d58d7-5fd9-4c29-bf47-95dc06999dfeOAI: oai:DiVA.org:ltu-11331DiVA, id: diva2:984281
Note
Validerad; 2016; Nivå 2; 20160816 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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