Investigation of hydrogen sorption-desorption processes at gas-phase hydrogenation and defects formation in titanium by means of electron-positron annihilation techniques

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

The results of hydrogen sorption and desorption processes investigation at commercially pure titanium alloy during hydrogenation at gas atmosphere are shown in this article. Titanium alloy hydrogenation at temperatures 350, 450 and 550 °C leads to δ-hydrides formation in samples' volume. Hydrogen sorption rates were calculated on the linear parts of sorption curves and equal to 0.15·10-4 wt%/s at 350 °C, 0.86·10-4 wt%/s at 450 °C, 1.55·10-4 wt%/s at 550 °C. Phase transition in titanium-hydrogen system during thermally stimulated hydrogen desorption investigation by the means of short-wave diffraction of synchrotron radiation shows hydrides dissociation until 520-530 °C. Then α→β transition takes place until 690-720 °C and at this temperatures the phase transformation ends and additional hydrogen desorption peak appears in thermally stimulated hydrogen desorption curve. Defect structure at different hydrogen concentration investigation by the means of electron-positron annihilation techniques shows that hydrogen penetration into titanium leads to crystal lattice expansion. It initiates vacancy-type defects formation which reacts with hydrogen and forms defect-hydrogen complexes.

Язык оригиналаАнглийский
Название основной публикацииPositron Annihilation - ICPA-17
ИздательTrans Tech Publications Ltd
Страницы317-323
Число страниц7
Том373 DDF
ISBN (печатное издание)9783038356059
DOI
СостояниеОпубликовано - 2016
Событие17th International Conference onPositron Annihilation, ICPA-17 - Wuhan, Китай
Продолжительность: 20 сен 201625 сен 2016

Конференция

Конференция17th International Conference onPositron Annihilation, ICPA-17
СтранаКитай
ГородWuhan
Период20.9.1625.9.16

ASJC Scopus subject areas

  • Radiation
  • Materials Science(all)
  • Condensed Matter Physics

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