Positron spectroscopy of defects in submicrocrystalline nickel after low-temperature annealing; Physics of the Solid State; Vol. 57, iss. 2

Positron spectroscopy of defects in submicrocrystalline nickel after low-temperature annealing; Physics of the Solid State; Vol. 57, iss. 2

Dettagli Bibliografici
Parent link:	Physics of the Solid State: Scientific Journal Vol. 57, iss. 2.— 2015.— [P. 219-228]
Ente Autore:	Национальный исследовательский Томский политехнический университет (ТПУ) Физико-технический институт (ФТИ) Кафедра общей физики (ОФ)
Altri autori:	Kuznetsov P. V. Pavel Viktorovich, Mironov Yu. P., Tolmachev A. I., Bordulev Yu. S. Yuri Sergeevich, Laptev R. S. Roman Sergeevich, Lider A. M. Andrey Markovich, Korznikov A. V.
Riassunto:	Title screen Using the method of measuring the positron lifetime spectra and Doppler broadening annihilation line spectroscopy, the annealing of defects in submicrocrystalline nickel produced by equal channel angular pressing has been studied. In as-prepared samples, the positrons are trapped by dislocation defects and vacancy complexes inside crystallites. The size of vacancy complexes decreases with increasing annealing temperature in the interval deltaT = 20–300°C. However, at T = 360°C, the complexes start growing again. The dependence of S-parameter on W-parameter derived from the Doppler broadening spectroscopy has two parts with different inclinations to axes that correspond to different types of primary centers of positron trapping in submicrocrystalline nickel. It has been elucidated that, at recovery stage in the temperature interval deltaT = 20–180°C, the main centers of positron trapping are low-angle boundaries enriched by impurities, while at in situ recrystallization stage in the temperature interval deltaT = 180–360°C, the primary centers of positron trapping are low-angle boundaries. Режим доступа: по договору с организацией-держателем ресурса
Lingua:	inglese
Pubblicazione:	2015
Soggetti:	электронный ресурс труды учёных ТПУ
Accesso online:	http://dx.doi.org/10.1134/S1063783415020225
Natura:	Elettronico Capitolo di libro
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=641047

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