Open AccessК вопросу об устойчивости метастабильной omega-фазы в псевдомонокристаллическом цирконии
Author(s) -
Л.Ю. Егорова,
Ю.В. Хлебникова,
В.П. Пилюгин
Publication year - 2020
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2020.01.48669.98-19
Subject(s) - materials science , zirconium , nucleation , interphase , dispersion (optics) , phase (matter) , metastability , metallurgy , composite material , analytical chemistry (journal) , thermodynamics , chemistry , chromatography , physics , optics , genetics , organic chemistry , biology
In the Bridgman chamber at temperatures of 20, 70, 100, 300 °C and at the identical scheme of loading zirconium pseudo-single samples are tested. The tests were carried out with a research objective of a possibility of maintaining the metastable ω-phase at increased temperatures. Researches showed that in the course of warm deformation, as a result of formation of equilibrium interphase boundaries and the oriented nucleation and growth of a ω-phase, there are stable structural configurations which promote increase in stability of a ω-phase after cooling and removal of loading. In the sample tested at 300 °C dispersion particles of hydride of zirconium, variable structure - δ-ZrH2-h which cause the high hardness comparable with a hardness of the sample which was subjected to tests at the room temperature are found.