Low-Temperature Helium Defectoscopy and Interaction of Helium with Ions of Cerium Gadolinium Ceramics Ce(0.8)Gd(0.2)O(1.9) with a Submicrocrystalline Structure / Kupryazhkin A. Ya.,Kovalenko M. A.,Koromyslov A. V.,Zhiganov A. N. // PHYSICS OF THE SOLID STATE. - 2011. - V. 53, l. 6. - P. 1198-1201.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

The concentration of unbound neutral anion vacancies in cerium gadolinium ceramics Ce(0.8)Gd(0.2)O(1.9) with a submicrocrystalline structure has been determined using low-temperature helium defectoscopy at temperatures ranging from 613 to 773 K and at saturation pressures from 0.05 to 12 MPa. It has been found that the energy of dissociation of impurity-vacancy complexes is 1.1 +/- 0.2 eV, and the energy of dissolution of helium in defects is -0.8 +/- 0.2 eV. The obtained results have been compared both with the experimental data on the energy of interaction between helium and ions of the cerium gadolinium ceramics and with the results of the quantum-chemical calculations. It has been demonstrated that the anomalously low value of the energy of helium dissolution in the studied ceramic samples is determined by the chemical interaction of helium with the nearest environment of the cerium cations.

Author keywords:

SOLUBILITY; DIFFUSION; DENSITY

DOI:

10.1134/S1063783411060175

Web of Science ID:

ISI:000292557900017

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	SOLUBILITY; DIFFUSION; DENSITY
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	kupr@dpt.ustu.ru
Number-of-Cited-References	12
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	45
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	789ZI