Variation of activation energy in Al–Ni-based alloy melts

Bian, Xiufang; Sun, Minhua; Lei, Wu; Cheng, Sujuan

doi:10.1016/s0025-5408(02)00794-8

Cited by 13 publications

(11 citation statements)

References 3 publications

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“…Meanwhile, we fitted the viscosity–temperature curve above the melting point in Figure 5 on the basis of Arrhenius equation. Activation energy is the function of the temperature but it is usually considered as a constant when the temperature is above the melting point (Kivelson and Tarjus, 1998; Bian et al, 2002; Meng et al, 2007). The fitting parameters and values of M are shown in Table 3.…”

Section: Resultsmentioning

confidence: 99%

Fragility of sugar melts

Liu

Ren

Lin

et al. 2012

Food sci. technol. int.

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Continuous viscosity of the sugar melt ranged from the superheated to the supercooled, was measured with a rotating viscometer. The thermal properties of sugars have been investigated by differential scanning calorimetric and thermogravimetry. The melt fragility and the fragility of the supercooled liquid have been calculated. This study indicated that, for the whole sugar system, the melt fragility and the fragility of the supercooled liquid separately show negative linear relations with the glass-forming ability and can be used as indicators of this property. In an individual sugar system, the fragility of the supercooled liquid has a direct proportion to melt fragility, which depends on the different inherent characteristic temperatures.

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Section: Resultsmentioning

confidence: 99%

Fragility of sugar melts

Liu

Ren

Lin

et al. 2012

Food sci. technol. int.

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“…47,48 The above-mentioned experimental methods have been detailed in the literature 16,22,[49][50][51] and here, only their brief descriptions were done. The available viscosity experimental datasets of liquid Ni-Al 18,19,26,27,30,[39][40][41][52][53][54][55][56][57][58] and Ni-Al-based alloys 10,13,14,29,59 together with the methods used to perform the measurements are discussed here.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Over the last 60 years, the reference data for the viscosity of pure liquid Al 18,26,27,39,41,52,[56][57][58] and Ni 10,18,19,26,27,40,53,56 have been determined by different viscometric methods 10,22,24 and collected in the literature. 17,18,[22][23][24] The same measurement methods have been mostly used to obtain the viscosity datasets of liquid Ni-Al binary alloys, 26,27,40,41,54,[55][56][57][58]79 either obtained over the entire composition range (Figure 3) or for Al-rich alloys, 41,54,57,58,79 containing up to 7.5 at.-% Ni (Figure 4).…”

Section: Viscosity Data Of Liquid Ni-al Alloysmentioning

confidence: 99%

“…Indeed, the experiments were carried out using Al 2 O 3 27,55,57,58 and BN 27 as container materials under protective purified helium 41,57,58 or flowing argon 27,55 atmosphere as well as in high vacuum. 54 In order to obtain reliable viscosity data, a preliminary investigation into the suitability of ceramic materials for the containers enabling accurate viscosity measurements as well as suitable surrounding atmosphere is necessary. Therefore, to avoid chemical reactions at the melt/ceramic interface, the material selection has to be based on the wetting experiments under a controlled atmosphere indicating the non-reactive wetting behaviour of a melt in contact with candidate materials.…”

Section: Viscosity Data Of Liquid Ni-al Alloysmentioning

confidence: 99%

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Viscosity of liquid Ni-based industrial alloys: experiments versus theory

Novakovic,

Giuranno,

Mohr

et al. 2024

International Materials Reviews

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The aim of this review is to succinctly review recent progress in experimental and theoretical investigation of the viscosity of binary and multicomponent Ni–Al-based industrial alloys, summarising the current state of knowledge of the topic. Viscosity data are important for simulation of microstructural evolution during solidification-related processes such as casting. Therefore, to obtain accurate predictions of defect-free microstructure, only reliable input data are required. Based on the synergy between experiment and theory, a review of the literature provides a critical evaluation of temperature- and composition-dependent viscosity data available from existing studies carried out over the last 60 years. The purpose of this review is threefold: to discuss container-based viscometer methods and alternative containerless processing via electromagnetic levitation during parabolic flights and on board the International Space Station; to analyse the viscosity models including their validation; and to refer to the first two points, to interpret the viscosity data.

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“…Viscosity values of liquid metals are important in the prediction of fluid flow in many metallurgical manufacturing processes. Investigations on the viscosity of metallic melts remain an active domain of research in both the technical and theoretical fields of condensed matter physics [13][14][15]. Arrhenius equation is one of the most frequently formulas used to represent the temperature dependence of the viscosity of liquid metals in a wide temperature range [16]:…”

Section: Introductionmentioning

confidence: 99%