Influence of rhenium on the hardness, structure and phase composition of the cobalt‑niobium and cobalt‑tantalum alloysстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 апреля 2024 г.
Аннотация:The processes of dispersion hardening of the cobalt‑niobium and cobalt‑tantalum alloys belonging to the fcc-solid solution based on cobalt jointly alloyed with rhenium are studied using scanning electron microscopy, local X-ray spectrum analysis, X-ray phase analysis, transmission electron microscopy, differential scanning calorimetry, and Vickers hardness measurements. Alloying with rhenium significantly increases the hardness of the cobalt‑niobium and cobalt‑tantalum alloys with the fcc-structure, since rhenium stabilizes the Co3Nb and Co3Ta phases and prevents the growth of their particles, thereby contributing to the preservation of the reticulated nanoscale structure. It is shown, that decomposition of the γCo-solid solution at 1200 K is accompanied by formation and growth of the Guinier-Preston zones, occurrence of the Suzuki atmospheres and subsequent formation of the metastable nanoscale Co3Nb and Co3Ta particles with the Mg3Cd-type of the crystal structure.