Influence of preliminary hydrostatic pressure treatment on the electrical resistance and structure of amorphous Co₆₇Cr₇Fe₄Si₈B₁₄ alloy

• Дата: 2010
• Автори: Varyukhin, V.N., Moroz, T.T., Abramov, V.S.
• Формат: Стаття
• Мова: English
• Опубліковано: Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України 2010
• Назва видання: Физика и техника высоких давлений
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/69265
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Influence of preliminary hydrostatic pressure treatment on the electrical resistance and structure of amorphous Co₆₇Cr₇Fe₄Si₈B₁₄ alloy / V.N. Varyukhin, T.T. Moroz, V.S. Abramov // Физика и техника высоких давлений. — 2010. — Т. 20, № 1. — С. 82-89. — Бібліогр.: 12 назв. — англ.

The effect of preliminary pressure treatment (PT) on peculiarities of changes in electrical resistance R and structure of the amorphous Co₆₇Cr₇Fe₄Si₈B₁₄ alloy during a constantrate heating to temperatures under the crystallization onset temperature has been studied using the resistance measurement and X-ray diffraction (XRD) methods. Preliminary PT has been done at 300 K (P = 1 GPa) in the repetitive static mode for different number N of loading cycles (N = 1, 3, 5).The XRD data show that the amorphous state of the studied alloy is conserved but its fine structure has changed after PT, as observed by variation of halo parameters. It has been found that after PT with an increase in the number N of loading cycles, the ordering of the original amorphous structure is enhanced, while after heating from 828 to 843 K, the disordering growth is enhanced. Anomalies of R (a minimum at 497 K and a sharp rise in the range of 800–843 K) observed in the dependence R(T) of the original amorphous alloy are present after the PT too. They seem to be due to structural phase transitions of amorphous alloy during heating.