Correlation between viscous-flow activation energy and phase diagram in four systems of Cu-based alloys

Ning, Shuang; Bian, Xiufang; Ren, Zhihui

doi:10.1016/j.physb.2010.05.055

Cited by 15 publications

(7 citation statements)

References 25 publications

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“…As shown in Fig. 4(a), viscosities increase during cooling process, which are very close to Ning's data [11] of near concentration in numerical values. As a structuresensitive property at atomic scale, during the cooling process, the increasing viscosity indicates the increasing size of clusters in the melts, which is consistent with the change of other structure parameters in Table 1.…”

Section: Influence Of Mrosupporting

confidence: 87%

“…The samples were placed in an alumina crucible hung by a torsional suspension, and heated at a rate of 4 K/min to 300 K above the liquidus; after maintaining those temperatures for 1 h, samples were cooled down to experimental temperatures and held for 20 min prior to taking measurements for each. The dynamic viscosities of melts were then calculated by using Shvidkovskiy equation [11,27]. Viscosity experiments were repeated for three or four times at each temperature.…”

Section: Methodsmentioning

confidence: 99%

“…Ning [11] revealed the relationship between viscosity value and the liquidus temperature. As shown in Fig.…”

Section: Influence Of Mromentioning

confidence: 99%

“…Gierlotka [10] reevaluated the phase diagram and reported the compositional inhomogeneity in Cu-rich Cu-Sb melts. Ning [11] measured the viscosities and revealed the correlation between the viscosity behavior and the liquidus temperature of CuSb system. Probing into liquid structure was of importance, not only to establish the correlations between structure and thermo-physical properties [12,13], but also to understand the mechanism of clusters evolution and get an insight into the process of materials preparation.…”

Section: Introductionmentioning

confidence: 99%

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Medium‐range order and physical properties of Cu–20at.% Sb melts

Guo

Qin

et al. 2012

Journal of Non-Crystalline Solids

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Section: Influence Of Mrosupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

“…Ning [11] revealed the relationship between viscosity value and the liquidus temperature. As shown in Fig.…”

Section: Influence Of Mromentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Medium‐range order and physical properties of Cu–20at.% Sb melts

Guo

Qin

et al. 2012

Journal of Non-Crystalline Solids

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“…Sin embargo, para la concentración de 45%Cu se obtuvo un valor mínimo de 0,74 kJ/mol, lo cual es de esperar considerando el carácter iónico-electrónico que tiene la perovskita, donde la energía de movilidad de carga es fundamental. En consecuencia, los ánodos con mayor cantidad de perovskita aumentaron su energía de activación, que es un factor determinante para su posible aplicación como ánodo en celdas SOFC [74].…”

Section: Tabla 2 -Composición De Los Cermets Coeficiente De Expansióunclassified

Impregnación de la perovskita La0.8Sr0.2Cr0.5Mn0.5O3-δ como ánodo en celdas SOFC

Flores¹,

Cabrera²,

Valencia³

et al. 2015

Boletín de la Sociedad Española de Cerámica y Vidrio

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información del artículo Historia del artículo: Recibido el 11 de mayo de 2015 Aceptado el 20 de julio de 2015 On-line el xxx Palabras clave: Celdas de combustible de óxido sólido Sol-gel Estructura de la perovskita Impregnación r e s u m e n Se han sintetizado a través del método sol-gel, y caracterizado por varias técnicas, nuevos compósitos tipo perovskita de La 0,8 Sr 0,2 Cr 0,5 Mn 0,5 O 3-␦ (LSCM), utilizando cobre (XCu; X = 25, 35 y 45%) como aditivo formador del cermet LSCM + Cu para utilizarse como ánodos alternativos en celdas de combustible de óxido sólido de temperatura intermedia (IT-SOFC). Se confirma por difracción de rayos X (XRD) la formación de fase de los cermets LSCM-Cu. La conductividad eléctrica obtenida desde temperatura ambiente hasta 800 • C indica la presencia de 2 tipos de comportamiento tanto semiconductor como metálico. Cuando la concentración de Cu fue del 25 y del 35%, el comportamiento que dominó fue del tipo semiconductor. La determinación de los coeficientes de expansión térmica (TEC) mostró una dependencia lineal inversamente proporcional a la concentración de Cu. Nuestros resultados de conductividad eléctrica, análisis morfológico y TEC sugieren que los ánodos con 25 y 35% de Cu tienen la mayor posibilidad para aplicarse en las celdas tipo SOFC-IT. © 2015 Publicado por Elsevier España, S.L.U. en nombre de SECV. Este es un artículo Open Access bajo la licencia CC BY-NC-ND (http://creativecommons.org/licenses/by-nc-nd/4.0/). Keywords: Solid oxide fuel cells Sol-gel Perovskite structure Impregnation a b s t r a c t New types of La 0,8 Sr 0,2 Cr 0,5 Mn 0,5 O 3-␦ (LSCM) perovskite composites with the addition of copper(Cu), XCu (X = 25, 35 and 45%) as forming additive, were synthesized via the sol-gel method as alternative anodes for intermediate-temperature solid oxide fuel cells (IT-SOFCs) and characterized by several techniques. Phase formation of the LSCM-Cu cermets was confirmed by X-ray diffraction (XRD). Electrical conductivity was obtained from room temperature to 800 • C, indicating the presence of two types of behaviors: both semiconductor and metal. When the concentration of Cu was 25 and 35%, the dominant behavior was the semiconductor type. The thermal expansion coefficient (TEC) determined was linearly inversely proportional to the concentration of Cu. The results of electrical conductivity, TEC, * Autor para correspondencia.Correo electrónico: cedhryck@hotmail.com (J. Alvarado-Flores). http://dx.

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Determination of Viscosity for Liquid Fe–Cr–Mn–Ni Alloys

Dubberstein

Heller

Fabrichnaya

et al. 2016

steel research int.

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The determination of viscosity of liquid Cr–Mn–Ni steel (16% Cr, 7% Mn) alloyed with 3–20% nickel is of interest in the present experimental investigation. The alloys are manufactured using a cold crucible induction levitation melting. The viscosity measurement is performed using a vibrating finger viscometer for high temperatures (≥1500 °C) and viscosities below 10 mPa s. The BN–ZrO2 vibrating finger is set in a driven harmonic oscillation in its resonance frequency of ca. 26 Hz. The constant peak‐to‐peak amplitude of the oscillator is controlled using a laser micrometer and a powered field coil. The viscosity of Fe–Cr–Mn–Ni alloys is slightly decreased from 3 to 6% nickel and from 6 to 9% nickel a slight increase of the isothermal viscosity is observed. Finally, the viscosity decreased significantly from 9 to 20% nickel content in the samples. The variation in the viscosity at high temperatures can be caused by a change in the primary solidification behavior, as shown in the phase diagram of the Cr–Mn–Ni steel. The temperature function of the viscosity of the high‐alloyed steels is expressed using the Arrhenius function. A precise viscosity measurement is necessary for a mathematical modeling of the vacuum inert gas atomization of steel powder manufacturing.

show abstract

Correlation between viscous-flow activation energy and phase diagram in four systems of Cu-based alloys

Cited by 15 publications

References 25 publications

Medium‐range order and physical properties of Cu–20at.% Sb melts

Medium‐range order and physical properties of Cu–20at.% Sb melts

Impregnación de la perovskita La0.8Sr0.2Cr0.5Mn0.5O3-δ como ánodo en celdas SOFC

Determination of Viscosity for Liquid Fe–Cr–Mn–Ni Alloys

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