Viscosity of high-entropy melts in Cu-Sn-Pb-Bi-Ga, G-Sn, Cu-Pb, Cu-Ga, and Cu-Bi equiatomic compositions / Chikova O.A., Tsepelev V.S., V’yukhin V.V. // Russian Journal of Non-Ferrous Metals. - 2015. - V. 56, l. 3. - P. 246-250.

ISSN:
10678212
Type:
Article
Abstract:
Temperature dependences of kinematic viscosity of high-entropy melts (HEM) of the composition, at %, Cu-20Sn-20Pb-20Bi-20Ga, Cu-50Sn, Cu-50Pb, Cu-50Ga, and Cu-50Bi are investigated in a temperature range from 1550 to 1300°C. It is shown that melt overheating above a definite temperature (thom) leads to the appearance of viscosity hysteresis, which indicates a variation in the structural state of the HEM. The values of thom for all studied samples are in limits of 925–1185°C. It is found that heating the HEM to definite temperatures (t*) leads to a variation in the activation energy of viscous flow (E) and entropy multiplier (A) in the Arrhenius equation: ν = Aexp[E/(RT)]. Entropy of viscous flow (ΔS#) for studied HEMs is investigated in terms of the Airing theory. It is revealed that the magnitude of ΔS# for a five-component Cu-Sn-Pb-Bi-Ga melt in a cooling mode is smaller than during heating by a factor of 2.6. The rheological characteristics of HEMs allow us to consider these melts promising functional materials: solders, heat carriers, and electric contacts. © 2015, Allerton Press, Inc.
Author keywords:
entropy; melt; melt structure; viscosity
Index keywords:
Activation energy; Contacts (fluid mechanics); Entropy; Functional materials; Gallium; Melting; Temperature distribution; Tin; Tin alloys; Viscosity; Viscous flow; Activation energy of viscous flow; A
DOI:
10.3103/S1067821215030037
Смотреть в Scopus:
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84937220378&doi=10.3103%2fS1067821215030037&partnerID=40&md5=55e0f3b5c7a6d42923adb811f0a4800e
Соавторы в МНС:
Другие поля
Поле Значение
Link https://www.scopus.com/inward/record.uri?eid=2-s2.0-84937220378&doi=10.3103%2fS1067821215030037&partnerID=40&md5=55e0f3b5c7a6d42923adb811f0a4800e
Affiliations Ural Federal University, ul. Mira 19, Yekaterinburg, Russian Federation
Author Keywords entropy; melt; melt structure; viscosity
References Tung, C.-C., Yeh, J.-W., Shun, T.-T., (2007) Mater. Lett., 61, 5p; Wang, X.F., Zhang, Y., Qiao, Y., Chen, G.L., (2007) Intermetallics, 15, pp. 357-362; Tong, C.-J., Chen, Y.-L., Chen, S.-K., (2005) Metal. Mater. Trans. A, 36A (4), pp. 881-893; Firstov, S.A., Gorban’, V.F., Krapivka, N.A., Pechkovskii, E.P., (2011) Kompoz. Nanomat., pp. 5-20; Sobol’, O.V., Andreev, A.A., Gorban’, V.F., (2012) Pis’ma Zh. Tekh. Fiz., 38 (13), pp. 41-48; Ostrovskii, O.I., Grigoryan, V.A., Vishkarev, A.F., (1988) Svoistva metallicheskikh rasplavov, , Metallurgiya, Moscow: (Properties of Metallic Melts); Glazov, V.M., Aivazov, A.A., (1980) Entropiya plavleniya metallov i poluprovodnikov, , Metallurgiya, Moscow: (Entropy of Melting of Metals and Semiconductors); Ziner, K., (1970) Ustoichivost’ faz v metallakh i splavakh, pp. 96-110. , Mir, Moscow: (Phase Stability in Metals and Alloys); Baum, B.A., Khasin, G.A., Tyagunov, G.V., (1984) Zhidkaya stal’, , Metallurgiya, Moscow: (Liquid Steel); Baum, B.A., (1979) Metallicheskie zhidkosti, , Nauka, Moscow: (Metallic Liquids); Korzhavina, O.A., Chikova, O.A., (1991) Rasplavy, pp. 10-17; Popel’, P.S., Chikova, O.A., Brodova, I.G., Polents, I.V., (1992) Fiz. Met. Metalloved., pp. 111-115; Tyagunov, G.V., Tsepelev, V.S., Kushnir, M.N., Yakovlev, G.N., (1980) Zavod. Lab., pp. 919-920; Povodator, A.M., Konashkov, V.V., V’yukhin, V.V., Tsepelev, V.S., (2010) Byull. Izobret.; Povodator, A.M., Konashkov, V.V., V’yukhin, V.V., Tsepelev, V.S., (2011) Byull. Izobret.; Brodova, I.G., Popel’, P.S., Barbin, N.M., Vatolin, N.A., (2005) Iskhodnye rasplavy kak osnova formirovaniya struktury i svoistv alyuminievykh splavov, , Ural Branch, Russ. Acad. Sci., Yekaterinburg: (Initial Melts as a Basis for the Formation of the Structure and Properties of Aluminum Alloys)
Correspondence Address Chikova, O.A.; Ural Federal University, ul. Mira 19, Russian Federation
Publisher Allerton Press Incorporation
Language of Original Document English
Abbreviated Source Title Russ. J. Non-ferrous Met.
Source Scopus