Publication: Specifics of Crystallization of Amorphous TiNiCu Alloys with High Concentrations of Copper
Дата
2020
Авторы
Khabibullina, I. A.
Sundeev, R. V.
Shelyakov, A. V.
Sitnikov, N. N.
Sevryukov, O. N.
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© 2020, Pleiades Publishing, Ltd.Abstract: Ribbons of alloys of the quasi-binary TiNi–TiCu system with 25, 30, 35, and 40 at % copper were fabricated by planar flow casting at a cooling rate of 106 K/s. The thickness of the ribbons was 30–50 μm, and their width was 10–20 mm. The structure and phase transformations of alloys were studied using electron microscopy, X-ray diffraction, and differential scanning calorimetry. It was found that the alloys with 25 and 30 at % Cu in the initial state have an amorphous-crystalline structure, which undergoes one-stage polymorphic crystallization of the amorphous state with the formation of austenitic phase B2 under heating in a calorimeter. When cooled to room temperature, phase B2 undergoes a martensitic transformation to orthorhombic phase B19. It was demonstrated that the alloys with 35 and 40 at % Cu become amorphous when quenched and undergo two-stage (primary and eutectic) crystallization under heating. The resulting structure is two-phase (tetragonal phase B11 (TiCu) with a small fraction of phase B2). An increase in the concentration of copper leads to a reduction in the onset temperature of crystallization.
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Specifics of Crystallization of Amorphous TiNiCu Alloys with High Concentrations of Copper / Khabibullina, I.A. [et al.] // Physics of the Solid State. - 2020. - 62. - № 6. - P. 937-941. - 10.1134/S1063783420060281
URI
https://www.doi.org/10.1134/S1063783420060281
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https://openrepository.mephi.ru/handle/123456789/21918
https://www.scopus.com/record/display.uri?eid=2-s2.0-85086236147&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000540164600002
https://openrepository.mephi.ru/handle/123456789/21918