Enthalpy Effect of Adding Cobalt to Liquid Sn-3.8Ag-0.7Cu Lead-Free Solder Alloy: Difference between Bulk and Nanosized Cobalt

Andriy Yakymoyych; George Kaptay; Ali Roshanghias; Hans Flandorfer; Herbert Ipser

doi:10.1021/acs.jpcc.5b09445

Enthalpy Effect of Adding Cobalt to Liquid Sn-3.8Ag-0.7Cu Lead-Free Solder Alloy: Difference between Bulk and Nanosized Cobalt

Andriy Yakymoyych (Corresponding author)
, George Kaptay
, Ali Roshanghias
, Hans Flandorfer
, Herbert Ipser

Department of Functional Materials and Catalysis

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Heat effects for the addition of Co in bulk and nanosized forms into the liquid Sn-3.8Ag-0.7Cu alloy were studied using drop calorimetry at four temperatures between 673 and 1173 K. Significant differences in the heat effects between nano and bulk Co additions were observed. The considerably more exothermic values of the measured enthalpy for nano Co additions are connected with the loss of the surface enthalpy of the nanoparticles due to the elimination of the surface of the nanoparticles upon their dissolution in the liquid alloy. This effect is shown to be independent of the calorimeter temperature (it depends only on the dropping temperature through the temperature dependence of the surface energy of the nanoparticles). Integral and partial enthalpies of mixing for Co in the liquid SAC-alloy were evaluated from the experimental data.

Original language	English
Pages (from-to)	1881-1890
Number of pages	10
Journal	The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces)
Volume	120
Issue number	3
DOIs	https://doi.org/10.1021/acs.jpcc.5b09445
Publication status	Published - 28 Jan 2016

Funding

Financial support for this study came from the Austrian Science Fund (FWF) under project nos. P 26304 and P 27049. The authors also want to acknowledge the help of Prof. M. Zehetbauer and Prof. E. Schaller from the Faculty of Physics, University of Vienna, with the Sn-4.1Ag-1.3Cu foil preparation and Dr. St. Puchegger of the Faculty of Physics, University of Vienna, with the SEM studies. The work by G.K. is performed in the Centre of Applied Materials Science and Nano-Technology at the University of Miskolc and within the TAMOP-4.2.2.A-11/1/KONV-2012-0019 project, and is carried out as part of the TAMOP-4.2.2.D-15/1/KONV-2015-0017 project in the framework of the New Szechenyi Plan, supported by the European Union, and cofinanced by the European Social Fund.

Austrian Fields of Science 2012

104003 Inorganic chemistry
104017 Physical chemistry
104011 Materials chemistry

Keywords

AG-CU SOLDER
NANOCALORIMETRIC MEASUREMENTS
NANO-PARTICLES
FREE-ENERGIES
SN
CO
MICROSTRUCTURE
NANOPARTICLES
TEMPERATURE
ELEMENTS

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10.1021/acs.jpcc.5b09445

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title = "Enthalpy Effect of Adding Cobalt to Liquid Sn-3.8Ag-0.7Cu Lead-Free Solder Alloy: Difference between Bulk and Nanosized Cobalt",

abstract = "Heat effects for the addition of Co in bulk and nanosized forms into the liquid Sn-3.8Ag-0.7Cu alloy were studied using drop calorimetry at four temperatures between 673 and 1173 K. Significant differences in the heat effects between nano and bulk Co additions were observed. The considerably more exothermic values of the measured enthalpy for nano Co additions are connected with the loss of the surface enthalpy of the nanoparticles due to the elimination of the surface of the nanoparticles upon their dissolution in the liquid alloy. This effect is shown to be independent of the calorimeter temperature (it depends only on the dropping temperature through the temperature dependence of the surface energy of the nanoparticles). Integral and partial enthalpies of mixing for Co in the liquid SAC-alloy were evaluated from the experimental data.",

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author = "Andriy Yakymoyych and George Kaptay and Ali Roshanghias and Hans Flandorfer and Herbert Ipser",

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year = "2016",

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doi = "10.1021/acs.jpcc.5b09445",

language = "English",

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Enthalpy Effect of Adding Cobalt to Liquid Sn-3.8Ag-0.7Cu Lead-Free Solder Alloy: Difference between Bulk and Nanosized Cobalt. / Yakymoyych, Andriy (Corresponding author); Kaptay, George; Roshanghias, Ali et al.
In: The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces), Vol. 120, No. 3, 28.01.2016, p. 1881-1890.

Publications: Contribution to journal › Article › Peer Reviewed

TY - JOUR

T1 - Enthalpy Effect of Adding Cobalt to Liquid Sn-3.8Ag-0.7Cu Lead-Free Solder Alloy: Difference between Bulk and Nanosized Cobalt

AU - Yakymoyych, Andriy

AU - Kaptay, George

AU - Roshanghias, Ali

AU - Flandorfer, Hans

AU - Ipser, Herbert

PY - 2016/1/28

Y1 - 2016/1/28

N2 - Heat effects for the addition of Co in bulk and nanosized forms into the liquid Sn-3.8Ag-0.7Cu alloy were studied using drop calorimetry at four temperatures between 673 and 1173 K. Significant differences in the heat effects between nano and bulk Co additions were observed. The considerably more exothermic values of the measured enthalpy for nano Co additions are connected with the loss of the surface enthalpy of the nanoparticles due to the elimination of the surface of the nanoparticles upon their dissolution in the liquid alloy. This effect is shown to be independent of the calorimeter temperature (it depends only on the dropping temperature through the temperature dependence of the surface energy of the nanoparticles). Integral and partial enthalpies of mixing for Co in the liquid SAC-alloy were evaluated from the experimental data.

AB - Heat effects for the addition of Co in bulk and nanosized forms into the liquid Sn-3.8Ag-0.7Cu alloy were studied using drop calorimetry at four temperatures between 673 and 1173 K. Significant differences in the heat effects between nano and bulk Co additions were observed. The considerably more exothermic values of the measured enthalpy for nano Co additions are connected with the loss of the surface enthalpy of the nanoparticles due to the elimination of the surface of the nanoparticles upon their dissolution in the liquid alloy. This effect is shown to be independent of the calorimeter temperature (it depends only on the dropping temperature through the temperature dependence of the surface energy of the nanoparticles). Integral and partial enthalpies of mixing for Co in the liquid SAC-alloy were evaluated from the experimental data.

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KW - NANO-PARTICLES

KW - FREE-ENERGIES

KW - SN

KW - CO

KW - MICROSTRUCTURE

KW - NANOPARTICLES

KW - TEMPERATURE

KW - ELEMENTS

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JO - The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces)

JF - The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces)

IS - 3

ER -

Enthalpy Effect of Adding Cobalt to Liquid Sn-3.8Ag-0.7Cu Lead-Free Solder Alloy: Difference between Bulk and Nanosized Cobalt

Abstract

Funding

Austrian Fields of Science 2012

Keywords

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