Published March 2004 | Version v1
Journal article Metadata-only

Inversion of the sign of radiation-plastic effect in C60 single crystals at a sc-fcc phase transition

Creators

  • 1. Tambovskij Gosudarstvennyj Univ. im. G.R. Derzhavina, Tambov (Russian Federation)
  • 2. RAN, Inst. Fiziki Tverdogo Tela, Chernogolovka, Moskovskaya Obl. (Russian Federation)

Description

It is established that reversible change in the C60 monocrystal microhardness, caused by the low-dose beta-radiation, leads to the change in the sign in the vicinity of the phase transition at Tc = 250-260 K. The radiation strengthening is observed by T < Tc and correspondingly the radiation weakening - by T > Tc. The kinetic characteristics of the processes of the beta-stimulated change in the C60 microhardness as well as its subsequent reduction to the initial state are studied within the temperature range of 170 up to 350 K. It is determined that both processes are of the thermoactivation character. The activation energies are identified and their difference for the sc- and fcc-lattices is indicated

Abstract (Russian)

Обнаружено, что обратимое изменение микротвердости монокристалла С60, вызванное малодозовым бета-облучением, меняет знак в окрестности фазового перехода при Tc = 250-260 K. При T < Tc наблюдается радиационное упрочнение, при T > Tc - разупрочнение. В интервале температур от 170 до 350 К исследованы кинетические характеристики процессов бета-стимулированного изменения микротвердости С60, а также ее последующего восстановления к исходному значению. Установлено, что оба процесса имеют термоактивационный характер. Определены энергии активации и показано их различие для sc- и fcc-решеток

Additional details

Additional titles

Original title (Russian)
Инверсия знака радиационно-пластического эффекта в монокристаллах C

Publishing Information

Journal Title
Fizika Tverdogo Tela
Journal Volume
46
Journal Issue
3
Journal Page Range
p. 569-572
ISSN
0367-3294
CODEN
FTVTAC

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
37064507
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ACTIVATION ENERGY; BETA PARTICLES; CRYSTAL-PHASE TRANSFORMATIONS; FCC LATTICES; FULLERENES; MICROHARDNESS; MONOCRYSTALS; PHYSICAL RADIATION EFFECTS; RADIATION DOSES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K
Descriptors DEC
CARBON; CHARGED PARTICLES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CRYSTALS; CUBIC LATTICES; DOSES; ELEMENTS; ENERGY; HARDNESS; IONIZING RADIATIONS; MECHANICAL PROPERTIES; NONMETALS; PHASE TRANSFORMATIONS; RADIATION EFFECTS; RADIATIONS; TEMPERATURE RANGE

Optional Information

Notes
18 refs., 4 figs.