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InyCo4Sb12 Skutterudite: Phase Equilibria and Crystal Structure

Identifieur interne : 000B06 ( Main/Repository ); précédent : 000B05; suivant : 000B07

InyCo4Sb12 Skutterudite: Phase Equilibria and Crystal Structure

Auteurs : RBID : Pascal:13-0361280

Descripteurs français

Pascal (Inist)
- Diagramme phase, Equilibre phase, Structure cristalline, Dépendance température, Recuit, Composé III-V, Semiconducteur III-V, Section isotherme, Liquidus, Indium, Haute température, Solubilité, Précipité, Effet température, Skutterudite, Skutterudites remplies, Monocristal, Propriété thermodynamique, Chaleur massique, Mode vibration anharmonique, Propriété physique, 6166F, 8130B, 6475, Mode hochet.

English descriptors

KwdEn :
- Anharmonic lattice modes, Annealing, Crystal structure, Filled skutterudites, High temperature, III-V compound, III-V semiconductors, Indium, Isothermal section, Liquidus, Monocrystals, Phase diagrams, Phase equilibria, Physical properties, Precipitates, Rattling mode, Skutterudite, Solubility, Specific heat, Temperature dependence, Temperature effects, Thermodynamic properties.

Abstract

Phase relations were investigated for the In-Co-Sb system in the temperature range from 375°C to 800°C using as-cast and annealed alloys. Phase equilibria in the CoSb-InSb-(Sb) composition triangle are presented by a series of isothermal sections and solidus and liquidus surfaces, accompanied by a Schulz-Scheil reaction scheme. The indium-filled skutterudite In_yCo₄Sb₁₂ already forms an equilibrium with liquid at 484°C, which might limit high-temperature applications of In-Co-Sb-based skutterudites. The maximal solubility of indium in In_yCo₄Sb₁₂ (y = 0.22) remains almost constant in the temperature range from 475°C to 700°C and corresponds to the equilibrium with CoSb₂ and InSb. The solubility of indium in the skutterudite phase is reduced to y = 0.09 when it coexists in equilibrium with InSb and (Sb), and this decrease of the solubility might be responsible for the formation of InSb precipitates. Temperature-dependent x-ray single-crystal and specific heat data for In_yCo₄Sb₁₂ were employed to determine the rattling behavior of In atoms in the skutterudite lattice.

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Pascal:13-0361280

Le document en format XML

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Co<sub>4</sub>
Sb<sub>12</sub>
 Skutterudite: Phase Equilibria and Crystal Structure</title>
<author><name sortKey="Grytsiv, A" uniqKey="Grytsiv A">A. Grytsiv</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physical Chemistry, University of Vienna, Währingerstrasse 42</s1>
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<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10</s1>
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<author><name sortKey="Michor, H" uniqKey="Michor H">H. Michor</name>
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<author><name sortKey="Bauer, E" uniqKey="Bauer E">E. Bauer</name>
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<author><name sortKey="Giester, G" uniqKey="Giester G">G. Giester</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anharmonic lattice modes</term>
<term>Annealing</term>
<term>Crystal structure</term>
<term>Filled skutterudites</term>
<term>High temperature</term>
<term>III-V compound</term>
<term>III-V semiconductors</term>
<term>Indium</term>
<term>Isothermal section</term>
<term>Liquidus</term>
<term>Monocrystals</term>
<term>Phase diagrams</term>
<term>Phase equilibria</term>
<term>Physical properties</term>
<term>Precipitates</term>
<term>Rattling mode</term>
<term>Skutterudite</term>
<term>Solubility</term>
<term>Specific heat</term>
<term>Temperature dependence</term>
<term>Temperature effects</term>
<term>Thermodynamic properties</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Diagramme phase</term>
<term>Equilibre phase</term>
<term>Structure cristalline</term>
<term>Dépendance température</term>
<term>Recuit</term>
<term>Composé III-V</term>
<term>Semiconducteur III-V</term>
<term>Section isotherme</term>
<term>Liquidus</term>
<term>Indium</term>
<term>Haute température</term>
<term>Solubilité</term>
<term>Précipité</term>
<term>Effet température</term>
<term>Skutterudite</term>
<term>Skutterudites remplies</term>
<term>Monocristal</term>
<term>Propriété thermodynamique</term>
<term>Chaleur massique</term>
<term>Mode vibration anharmonique</term>
<term>Propriété physique</term>
<term>6166F</term>
<term>8130B</term>
<term>6475</term>
<term>Mode hochet</term>
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<front><div type="abstract" xml:lang="en">Phase relations were investigated for the In-Co-Sb system in the temperature range from 375°C to 800°C using as-cast and annealed alloys. Phase equilibria in the CoSb-InSb-(Sb) composition triangle are presented by a series of isothermal sections and solidus and liquidus surfaces, accompanied by a Schulz-Scheil reaction scheme. The indium-filled skutterudite In<sub>y</sub>
Co<sub>4</sub>
Sb<sub>12</sub>
 already forms an equilibrium with liquid at 484°C, which might limit high-temperature applications of In-Co-Sb-based skutterudites. The maximal solubility of indium in In<sub>y</sub>
Co<sub>4</sub>
Sb<sub>12</sub>
 (y = 0.22) remains almost constant in the temperature range from 475°C to 700°C and corresponds to the equilibrium with CoSb<sub>2</sub>
 and InSb. The solubility of indium in the skutterudite phase is reduced to y = 0.09 when it coexists in equilibrium with InSb and (Sb), and this decrease of the solubility might be responsible for the formation of InSb precipitates. Temperature-dependent x-ray single-crystal and specific heat data for In<sub>y</sub>
Co<sub>4</sub>
Sb<sub>12</sub>
 were employed to determine the rattling behavior of In atoms in the skutterudite lattice.</div>
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 Skutterudite: Phase Equilibria and Crystal Structure</s1>
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<fC01 i1="01" l="ENG"><s0>Phase relations were investigated for the In-Co-Sb system in the temperature range from 375°C to 800°C using as-cast and annealed alloys. Phase equilibria in the CoSb-InSb-(Sb) composition triangle are presented by a series of isothermal sections and solidus and liquidus surfaces, accompanied by a Schulz-Scheil reaction scheme. The indium-filled skutterudite In<sub>y</sub>
Co<sub>4</sub>
Sb<sub>12</sub>
 already forms an equilibrium with liquid at 484°C, which might limit high-temperature applications of In-Co-Sb-based skutterudites. The maximal solubility of indium in In<sub>y</sub>
Co<sub>4</sub>
Sb<sub>12</sub>
 (y = 0.22) remains almost constant in the temperature range from 475°C to 700°C and corresponds to the equilibrium with CoSb<sub>2</sub>
 and InSb. The solubility of indium in the skutterudite phase is reduced to y = 0.09 when it coexists in equilibrium with InSb and (Sb), and this decrease of the solubility might be responsible for the formation of InSb precipitates. Temperature-dependent x-ray single-crystal and specific heat data for In<sub>y</sub>
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<s5>03</s5>
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<s5>03</s5>
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<s5>04</s5>
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<fC03 i1="09" i2="X" l="GER"><s0>Liquidus</s0>
<s5>09</s5>
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<s2>NC</s2>
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<s5>11</s5>
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<s5>11</s5>
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<s5>12</s5>
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<fC03 i1="12" i2="3" l="ENG"><s0>Solubility</s0>
<s5>12</s5>
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<fC03 i1="13" i2="3" l="FRE"><s0>Précipité</s0>
<s5>13</s5>
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<s5>13</s5>
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<s5>14</s5>
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<s5>14</s5>
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<fC03 i1="15" i2="X" l="FRE"><s0>Skutterudite</s0>
<s5>15</s5>
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<fC03 i1="15" i2="X" l="ENG"><s0>Skutterudite</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA"><s0>Skutterubita</s0>
<s5>15</s5>
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<s5>17</s5>
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<s5>30</s5>
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<s5>30</s5>
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<s5>32</s5>
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<s4>CD</s4>
<s5>96</s5>
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<fC03 i1="25" i2="3" l="ENG"><s0>Rattling mode</s0>
<s4>CD</s4>
<s5>96</s5>
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InyCo4Sb12 Skutterudite: Phase Equilibria and Crystal Structure

InyCo4Sb12 Skutterudite: Phase Equilibria and Crystal Structure

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