Extended solubility in non-equilibrium Pb/Fe system

Nunes, E; Passamani, E. C.; Larica, C.; Freitas, Jair C. C.; Takeuchi, A.Y.; Baggio-Saitovitch, E.; Fernandes, Antônio Alberto Ribeiro

doi:10.1016/j.msea.2004.05.032

Cited by 18 publications

(6 citation statements)

References 11 publications

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“…Five sets of Fe-Ta multilayers were designed with overall compositions of Fe75Ta25, Fe50Ta50, Fe40Ta60, Fe25Ta75 and Fe20Ta80, to cover a relatively broad composition range. As it has been turned out that ion mixing of multilayered films can extend the solid solubility of the alloys, and thus result in the formation of a number of supersaturated solid solutions [19,20], the compositions near the limits of single-phase zone were omitted. The multilayered films consisted of totally 15, 17, 13, 7 and 7 layers, respectively.…”

Section: Methodsmentioning

confidence: 99%

Structural phase transition in the Fe–Ta system studied by ion beam mixing

Ding

Wang

Tai

et al. 2009

Journal of Alloys and Compounds

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Section: Methodsmentioning

confidence: 99%

Structural phase transition in the Fe–Ta system studied by ion beam mixing

Ding

Wang

Tai

et al. 2009

Journal of Alloys and Compounds

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“…Therefore, this methodology is safer and more environmentally friendly than traditional wet chemical methods, which produce considerable amount of toxic and harmful by-products [9]. Moreover, it is possible to obtain metastable phases such as supersaturated solid solutions, due to the extension of solubility limit, crystalline and quasicrystalline intermediate phases, which can be tricky to prepare by other synthesis methods [10][11][12][13][14][15][16][17]. High-temperature chemical reactions can thereby be induced at room temperature and, generally, the resulting materials are nanostructured, homogeneously distributed with high reactivity and sinterability due to the accumulation of defects and the fresh surface area created during the milling process [13,18,19].…”

Section: Introductionmentioning

confidence: 99%

Unveiling mechanochemistry: Kinematic-kinetic approach for the prediction of mechanically induced reactions

Gil‐González

Rodríguez-Laguna

Jiménez

et al. 2021

Journal of Alloys and Compounds

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Mechanochemistry has attracted a lot of attention over the last few decades with a rapid growth in the number of publications due to its unique features. However, very little is known about how mechanical energy is converted into chemical energy. Most of the published works using mechanochemistry neglect the required attention to the experimental parameters and their effect over the resulting products, what makes extremely difficult to reproduce the results from lab to lab. Moreover, if it is taken into consideration the broad range of experimental conditions used in different studies, it is quite difficult to compare results and set optimum conditions. As a result, mechanochemistry is generally viewed as a "black box". The aim of this work is to provide some insight into mechanochemistry. Thus, a simple kinematic-kinetic approach that allows the full parametrization of mechanically induced reactions is proposed. In an analogous way to thermally activated process, it is shown that kinetic modeling can serve to parametrize and model mechanically induced reactions as a function of the milling parameters with great reliability, thereby gaining prediction capability. As a way of example, this methodology has been applied for the first time to the mechanochemical reaction of Co and Sb to form CoSb3, a skutterudite-type thermoelectric material. Moreover, the universality of this methodology has also been validated with data from the literature. A key feature of the proposed kinematickinetic approach is that it can be extrapolated to other mechanically induced reactions, either inorganic or organic.

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“…Solid solubility has been extended in many alloy systems by non-equilibrium processing methods, such as rapid solidification processing, and vapor-phase depositions. 25,26) When (Ba x Sr 1-x )Si 2 thin films are prepared by sputtering methods, this idea would also be applied.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric (Ba_xSr_1–x)Si₂ films prepared by sputtering method over the barium solubility limit

Aoyama

Shiraishi

Kuramochi

et al. 2020

Jpn. J. Appl. Phys.

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In this work, (Ba x Sr 1-x )Si 2 thin films were prepared by the co-sputtering method at various deposition temperatures. The constituent phase of the films primarily depended on the deposition temperature and the composition x. The composition to make a solid solution was expanded by lowering the deposition temperature, compared to that of bulk-sintered bodies. Further lowering the deposition temperature produced a metastable phase, which was a layered structure (trigonal, EuGe 2 -type structure), with a low thermoelectric power factor. Substitution with Ba led to an increase in the temperature showing the highest power factor. The samples with Ba concentrations over 17% showed the maximum power factor around room temperature. © 2020 The Japan Society of Applied Physics 2. Experimental (Ba x Sr 1-x )Si 2 films 1.0-2.5 μm in thickness were prepared on (001) Al 2 O 3 substrates by the RF magnetron co-sputtering method under Ar with 5% H 2 . Sintered bodies of SrSi 2 and BaSi 2 were used as sputtering targets. The deposition temperature was 600, 650, and 700 ºC, while the deposition pressure was kept at 100 mTorr. In order to control the film composition x, the RF power for BaSi 2 was changed from 0 to 50 W, while the power for the SrSi 2 target was fixed to 50 W. The target-substrate distance was maintained at 60 mm.The Ba/(Ba + Sr) ratio, the value of x, of the deposited film was measured by X-ray fluorescence spectrometry (XRF; PANalytical, PW4400). The constituent phase of the films was characterized by X-ray diffraction (XRD; Bruker AXS, D8 DISCOVER). Scans of the 2θ-θ mode were repeated by changing the sample inclination angle (ψ) under the sample rotation conditions. Integrated 2θ-θ scans were obtained by integration along the ψ direction. 27)

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Extended solubility in non-equilibrium Pb/Fe system

Cited by 18 publications

References 11 publications

Structural phase transition in the Fe–Ta system studied by ion beam mixing

Structural phase transition in the Fe–Ta system studied by ion beam mixing

Unveiling mechanochemistry: Kinematic-kinetic approach for the prediction of mechanically induced reactions

Thermoelectric (Ba_xSr_1–x)Si₂ films prepared by sputtering method over the barium solubility limit

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Extended solubility in non-equilibrium Pb/Fe system

Cited by 18 publications

References 11 publications

Structural phase transition in the Fe–Ta system studied by ion beam mixing

Structural phase transition in the Fe–Ta system studied by ion beam mixing

Unveiling mechanochemistry: Kinematic-kinetic approach for the prediction of mechanically induced reactions

Thermoelectric (Ba x Sr1–x )Si2 films prepared by sputtering method over the barium solubility limit

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Product

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About

Thermoelectric (Ba_xSr_1–x)Si₂ films prepared by sputtering method over the barium solubility limit