Publication: Formation of structure of TiNiCu alloys with high copper content upon producing by planar flow casting
Дата
2020
Авторы
Shelyakov, A. V.
Sevryukov, O. N.
Sitnikov, N. N.
Borodako, K. A.
Khabibullina, I. A.
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© Published under licence by IOP Publishing Ltd.The rapidly quenched alloys of the quasibinary intermetallic TiNi-TiCu system with a high copper content (more than 25 at.%) are of great interest as shape memory materials due to the possibility of a significant decrease in the temperature and deformation hysteresis in comparison with the binary TiNi alloy. To obtain alloys with a copper content of 25 to 40 at.%, the planar flow casting technique was used. The alloys were fabricated at a melt cooling rate of about 106 K/s in the form of ribbons 30-50 µm thick and wide in the range from 7 to 20 mm. The study of the structure of the alloys was carried out using X-ray diffraction analysis, scanning and transmission electron microscopy. It was shown that from the ribbon side, contacting the quenching wheel, all alloys are amorphous, while on the non-contact side of the ribbons of alloys with 25 and 30 at.% Cu, a thin surface crystalline layer with a B2 structure is observed. Using energy dispersive X-ray spectroscopy, it was found that the content of the alloy components in the amorphous and crystalline phases coincides.
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Formation of structure of TiNiCu alloys with high copper content upon producing by planar flow casting / Shelyakov, A.V. [et al.] // Journal of Physics: Conference Series. - 2020. - 1686. - № 1. - 10.1088/1742-6596/1686/1/012056