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Crystallisation kinetics, glass forming ability and thermal stability in glassy Se100-xInx chalcogenide alloys

Identifieur interne : 003261 ( Main/Repository ); précédent : 003260; suivant : 003262

Crystallisation kinetics, glass forming ability and thermal stability in glassy Se100-xInx chalcogenide alloys

Auteurs : RBID : Pascal:11-0459576

Descripteurs français

Pascal (Inist)
- Cristallisation, Cinétique, Transition vitreuse, Stabilité thermique, Propriété thermique, Etat vitreux, Calorimétrie différentielle balayage, Condition non isotherme, Traitement thermique, Thermogravimétrie, Point fusion, Energie activation, Paramètre thermique, Indium, Verre, 6470K, 6470P, 6540D, 8105K.
Wicri :
- concept : Verre.

English descriptors

KwdEn :
- Activation energy, Crystallization, Differential scanning calorimetry, Glass, Glass transition, Heat treatments, Indium, Kinetics, Melting points, Non isothermal condition, Thermal parameter, Thermal properties, Thermal stability, Thermogravimetry, Vitreous state.

Abstract

Differential scanning calorimetry (DSC) studies have been done under non-isothermal conditions at different heating rates for glassy Se_100-xIn_x (5≤x≤20) alloys. DSC traces with well-defined endothermic and exothermic troughs and peaks at glass transition (T_g), crystallisation (T_c) and melting (T_m) temperatures were observed. The crystallisation kinetics parameters, Avrami index (n), activation energy for crystallisation (E_c) and frequency factor (K_o), have been calculated on the basis of the classical Johnson-Mehl-Avrami (JMA) model and related methods derived by Kissinger, Augis-Bennett and Mahedevan. Activation energy for glass transformation (E_t) has been evaluated on the usual two different non-isothermal methods developed by Moynihan and Kissinger. An extension of the Augis-Bennett method well known for evaluating E_c to calculate E_t has been explored with satisfactory results. Results obtained from these methods are in close agreement with each other. Close correlation between E_t, E_c and heating rate (β) was observed. The glass forming ability (GFA) and thermal stability parameters have been calculated for each glass system. It was found that the proportion of indium additive changed significantly the values of glass/crystal transformation, GFA and thermal stability of the studied system.

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Pascal:11-0459576

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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Crystallisation kinetics, glass forming ability and thermal stability in glassy Se<sub>100-x</sub>
In<sub>x</sub>
 chalcogenide alloys</title>
<author><name sortKey="Muiva, Cosmas M" uniqKey="Muiva C">Cosmas M. Muiva</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, University of Botswana, P/Bag UB-0022</s1>
<s2>Gaborone</s2>
<s3>BWA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Botswana</country>
<wicri:noRegion>Gaborone</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>African Materials Science and Engineering Network (AMSEN), University of Botswana Node, P/Bag UB-0022</s1>
<s2>Gaborone</s2>
<s3>BWA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
</inist:fA14>
<country>Botswana</country>
<wicri:noRegion>Gaborone</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Sathiaraj, Stephen T" uniqKey="Sathiaraj S">Stephen T. Sathiaraj</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, University of Botswana, P/Bag UB-0022</s1>
<s2>Gaborone</s2>
<s3>BWA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Botswana</country>
<wicri:noRegion>Gaborone</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>African Materials Science and Engineering Network (AMSEN), University of Botswana Node, P/Bag UB-0022</s1>
<s2>Gaborone</s2>
<s3>BWA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
</inist:fA14>
<country>Botswana</country>
<wicri:noRegion>Gaborone</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Mwabora, Julius M" uniqKey="Mwabora J">Julius M. Mwabora</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physics, University of Nairobi, P.O. Box 30197</s1>
<s2>00100 Nairobi</s2>
<s3>KEN</s3>
<sZ>3 aut.</sZ>
</inist:fA14>
<country>Kenya</country>
<wicri:noRegion>00100 Nairobi</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>African Materials Science and Engineering Network (AMSEN), University of Botswana Node, P/Bag UB-0022</s1>
<s2>Gaborone</s2>
<s3>BWA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
</inist:fA14>
<country>Botswana</country>
<wicri:noRegion>Gaborone</wicri:noRegion>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="inist">11-0459576</idno>
<date when="2011">2011</date>
<idno type="stanalyst">PASCAL 11-0459576 INIST</idno>
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<seriesStmt><idno type="ISSN">0022-3093</idno>
<title level="j" type="abbreviated">J. non-cryst. solids</title>
<title level="j" type="main">Journal of non-crystalline solids</title>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term>
<term>Crystallization</term>
<term>Differential scanning calorimetry</term>
<term>Glass</term>
<term>Glass transition</term>
<term>Heat treatments</term>
<term>Indium</term>
<term>Kinetics</term>
<term>Melting points</term>
<term>Non isothermal condition</term>
<term>Thermal parameter</term>
<term>Thermal properties</term>
<term>Thermal stability</term>
<term>Thermogravimetry</term>
<term>Vitreous state</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Cristallisation</term>
<term>Cinétique</term>
<term>Transition vitreuse</term>
<term>Stabilité thermique</term>
<term>Propriété thermique</term>
<term>Etat vitreux</term>
<term>Calorimétrie différentielle balayage</term>
<term>Condition non isotherme</term>
<term>Traitement thermique</term>
<term>Thermogravimétrie</term>
<term>Point fusion</term>
<term>Energie activation</term>
<term>Paramètre thermique</term>
<term>Indium</term>
<term>Verre</term>
<term>6470K</term>
<term>6470P</term>
<term>6540D</term>
<term>8105K</term>
</keywords>
<keywords scheme="Wicri" type="concept" xml:lang="fr"><term>Verre</term>
</keywords>
</textClass>
</profileDesc>
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<front><div type="abstract" xml:lang="en">Differential scanning calorimetry (DSC) studies have been done under non-isothermal conditions at different heating rates for glassy Se<sub>100-x</sub>
In<sub>x</sub>
 (5≤x≤20) alloys. DSC traces with well-defined endothermic and exothermic troughs and peaks at glass transition (T<sub>g</sub>
), crystallisation (T<sub>c</sub>
) and melting (T<sub>m)</sub>
 temperatures were observed. The crystallisation kinetics parameters, Avrami index (n), activation energy for crystallisation (E<sub>c</sub>
) and frequency factor (K<sub>o</sub>
), have been calculated on the basis of the classical Johnson-Mehl-Avrami (JMA) model and related methods derived by Kissinger, Augis-Bennett and Mahedevan. Activation energy for glass transformation (E<sub>t</sub>
) has been evaluated on the usual two different non-isothermal methods developed by Moynihan and Kissinger. An extension of the Augis-Bennett method well known for evaluating E<sub>c</sub>
 to calculate E<sub>t</sub>
 has been explored with satisfactory results. Results obtained from these methods are in close agreement with each other. Close correlation between E<sub>t</sub>
, E<sub>c</sub>
 and heating rate (β) was observed. The glass forming ability (GFA) and thermal stability parameters have been calculated for each glass system. It was found that the proportion of indium additive changed significantly the values of glass/crystal transformation, GFA and thermal stability of the studied system.</div>
</front>
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<fA06><s2>22-23</s2>
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 chalcogenide alloys</s1>
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<fA11 i1="01" i2="1"><s1>MUIVA (Cosmas M.)</s1>
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<fA11 i1="02" i2="1"><s1>SATHIARAJ (Stephen T.)</s1>
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<fA11 i1="03" i2="1"><s1>MWABORA (Julius M.)</s1>
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<fA14 i1="01"><s1>Department of Physics, University of Botswana, P/Bag UB-0022</s1>
<s2>Gaborone</s2>
<s3>BWA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Department of Physics, University of Nairobi, P.O. Box 30197</s1>
<s2>00100 Nairobi</s2>
<s3>KEN</s3>
<sZ>3 aut.</sZ>
</fA14>
<fA14 i1="03"><s1>African Materials Science and Engineering Network (AMSEN), University of Botswana Node, P/Bag UB-0022</s1>
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<sZ>2 aut.</sZ>
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<fC01 i1="01" l="ENG"><s0>Differential scanning calorimetry (DSC) studies have been done under non-isothermal conditions at different heating rates for glassy Se<sub>100-x</sub>
In<sub>x</sub>
 (5≤x≤20) alloys. DSC traces with well-defined endothermic and exothermic troughs and peaks at glass transition (T<sub>g</sub>
), crystallisation (T<sub>c</sub>
) and melting (T<sub>m)</sub>
 temperatures were observed. The crystallisation kinetics parameters, Avrami index (n), activation energy for crystallisation (E<sub>c</sub>
) and frequency factor (K<sub>o</sub>
), have been calculated on the basis of the classical Johnson-Mehl-Avrami (JMA) model and related methods derived by Kissinger, Augis-Bennett and Mahedevan. Activation energy for glass transformation (E<sub>t</sub>
) has been evaluated on the usual two different non-isothermal methods developed by Moynihan and Kissinger. An extension of the Augis-Bennett method well known for evaluating E<sub>c</sub>
 to calculate E<sub>t</sub>
 has been explored with satisfactory results. Results obtained from these methods are in close agreement with each other. Close correlation between E<sub>t</sub>
, E<sub>c</sub>
 and heating rate (β) was observed. The glass forming ability (GFA) and thermal stability parameters have been calculated for each glass system. It was found that the proportion of indium additive changed significantly the values of glass/crystal transformation, GFA and thermal stability of the studied system.</s0>
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<s5>03</s5>
</fC03>
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<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>Thermal stability</s0>
<s5>04</s5>
</fC03>
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<s5>05</s5>
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<s5>13</s5>
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<s2>NC</s2>
<s5>14</s5>
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<fC03 i1="14" i2="3" l="ENG"><s0>Indium</s0>
<s2>NC</s2>
<s5>14</s5>
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<fC03 i1="15" i2="3" l="FRE"><s0>Verre</s0>
<s5>15</s5>
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<fC03 i1="15" i2="3" l="ENG"><s0>Glass</s0>
<s5>15</s5>
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<s4>INC</s4>
<s5>71</s5>
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<fC03 i1="17" i2="3" l="FRE"><s0>6470P</s0>
<s4>INC</s4>
<s5>72</s5>
</fC03>
<fC03 i1="18" i2="3" l="FRE"><s0>6540D</s0>
<s4>INC</s4>
<s5>73</s5>
</fC03>
<fC03 i1="19" i2="3" l="FRE"><s0>8105K</s0>
<s4>INC</s4>
<s5>74</s5>
</fC03>
<fN21><s1>319</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
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Crystallisation kinetics, glass forming ability and thermal stability in glassy Se100-xInx chalcogenide alloys

Crystallisation kinetics, glass forming ability and thermal stability in glassy Se100-xInx chalcogenide alloys

Descripteurs français

English descriptors

Abstract

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Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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