Analysis of DTA and dilatometric data used to study the behaviour of a mould flux

Autores
Benavidez, Edgardo; Santini, Leandro; Brandaleze, Elena
Año de publicación
2019
Idioma
español castellano
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
In the present work a casting powder containing ≈ 36 wt% SiO2, ≈ 31 wt% CaO, 13 wt% Na2O, and 10 wt% CaF2, was used as starting material. A mass of 10 g of the mould powder was placed in a graphite crucible and melted at 1300°C. After 15 minutes at this temperature, the melt was poured onto a stainless steel inclined plate. By this method, solid glass layers were produced, which were sectioned into bars 10-15 mm in length to be used in dilatometric tests. Some of these bars were ground to powder to perform DTA runs. Both tests (DTA and dilatometry) were carried out at different heating rates: 5, 10 and 15 ºC/min, in air atmosphere, up to 900°C. Data of glass transition temperature (Tg), and crystallization peak temperature (Tc) were obtained from DTA and dilatometric runs. From these data, several non-isothermal methods based on Kissinger, Augis-Bennet, Ozawa, and Cheng models, were used to study the crystallization kinetics. Based on these models, the activation energy of crystallization (E), the frequency factor () and the crystallization rate constant (k) were calculated. A subsequent study was followed to determine the Avrami exponent and the crystallized fraction. The crystallographic phases were determined by XRD and the microstructure of samples, treated between 400-900 ºC, was observed by optical and electronic microscopy.
Fil: Benavidez, Edgardo. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento de Ingeniería Metalúrgica. Centro DEYTEMA; Argentina.
Fil: Santini, Leandro. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento Metalurgia. Centro DEYTEMA; Argentina.
Fil: Brandaleze, Elena. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento Metalurgia. Centro DEYTEMA; Argentina.
Materia
mould fluxes
crystallization
dilatometry
differential
thermal
analysis
Nivel de accesibilidad
acceso abierto
Condiciones de uso
2022-12-14T14:32:58Z
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/7389
Acceder
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network_acronym_str RIAUTN
repository_id_str a
network_name_str Repositorio Institucional Abierto (UTN)
spelling Analysis of DTA and dilatometric data used to study the behaviour of a mould fluxBenavidez, EdgardoSantini, LeandroBrandaleze, Elenamould fluxescrystallizationdilatometrydifferentialthermalanalysisIn the present work a casting powder containing ≈ 36 wt% SiO2, ≈ 31 wt% CaO, 13 wt% Na2O, and 10 wt% CaF2, was used as starting material. A mass of 10 g of the mould powder was placed in a graphite crucible and melted at 1300°C. After 15 minutes at this temperature, the melt was poured onto a stainless steel inclined plate. By this method, solid glass layers were produced, which were sectioned into bars 10-15 mm in length to be used in dilatometric tests. Some of these bars were ground to powder to perform DTA runs. Both tests (DTA and dilatometry) were carried out at different heating rates: 5, 10 and 15 ºC/min, in air atmosphere, up to 900°C. Data of glass transition temperature (Tg), and crystallization peak temperature (Tc) were obtained from DTA and dilatometric runs. From these data, several non-isothermal methods based on Kissinger, Augis-Bennet, Ozawa, and Cheng models, were used to study the crystallization kinetics. Based on these models, the activation energy of crystallization (E), the frequency factor () and the crystallization rate constant (k) were calculated. A subsequent study was followed to determine the Avrami exponent and the crystallized fraction. The crystallographic phases were determined by XRD and the microstructure of samples, treated between 400-900 ºC, was observed by optical and electronic microscopy.Fil: Benavidez, Edgardo. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento de Ingeniería Metalúrgica. Centro DEYTEMA; Argentina.Fil: Santini, Leandro. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento Metalurgia. Centro DEYTEMA; Argentina.Fil: Brandaleze, Elena. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento Metalurgia. Centro DEYTEMA; Argentina.2022-12-14T14:32:58Z2022-12-14T14:32:58Z2019-06-01info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciapdfapplication/pdfchrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://static.akcongress.com/downloads/jtacc/jtacc2019-boa.pdfhttp://hdl.handle.net/20.500.12272/7389spainfo:eu-repo/semantics/openAccess2022-12-14T14:32:58Zhttp://creativecommons.org/licenses/by-nc-nd/4.0/Attribution-NonCommercial-NoDerivatives 4.0 InternacionalLicencia CC BY NC NDreponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacional2026-09-24T12:45:57Zoai:ria.utn.edu.ar:20.500.12272/7389instacron:UTNInstitucionalhttp://ria.utn.edu.ar/Universidad públicaNo correspondehttp://ria.utn.edu.ar/oaigestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:a2026-09-24 12:45:58.417Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv Analysis of DTA and dilatometric data used to study the behaviour of a mould flux
title Analysis of DTA and dilatometric data used to study the behaviour of a mould flux
spellingShingle Analysis of DTA and dilatometric data used to study the behaviour of a mould flux
Benavidez, Edgardo
mould fluxes
crystallization
dilatometry
differential
thermal
analysis
title_short Analysis of DTA and dilatometric data used to study the behaviour of a mould flux
title_full Analysis of DTA and dilatometric data used to study the behaviour of a mould flux
title_fullStr Analysis of DTA and dilatometric data used to study the behaviour of a mould flux
title_full_unstemmed Analysis of DTA and dilatometric data used to study the behaviour of a mould flux
title_sort Analysis of DTA and dilatometric data used to study the behaviour of a mould flux
dc.creator.none.fl_str_mv Benavidez, Edgardo
Santini, Leandro
Brandaleze, Elena
author Benavidez, Edgardo
author_facet Benavidez, Edgardo
Santini, Leandro
Brandaleze, Elena
author_role author
author2 Santini, Leandro
Brandaleze, Elena
author2_role author
author
dc.subject.none.fl_str_mv mould fluxes
crystallization
dilatometry
differential
thermal
analysis
topic mould fluxes
crystallization
dilatometry
differential
thermal
analysis
dc.description.none.fl_txt_mv In the present work a casting powder containing ≈ 36 wt% SiO2, ≈ 31 wt% CaO, 13 wt% Na2O, and 10 wt% CaF2, was used as starting material. A mass of 10 g of the mould powder was placed in a graphite crucible and melted at 1300°C. After 15 minutes at this temperature, the melt was poured onto a stainless steel inclined plate. By this method, solid glass layers were produced, which were sectioned into bars 10-15 mm in length to be used in dilatometric tests. Some of these bars were ground to powder to perform DTA runs. Both tests (DTA and dilatometry) were carried out at different heating rates: 5, 10 and 15 ºC/min, in air atmosphere, up to 900°C. Data of glass transition temperature (Tg), and crystallization peak temperature (Tc) were obtained from DTA and dilatometric runs. From these data, several non-isothermal methods based on Kissinger, Augis-Bennet, Ozawa, and Cheng models, were used to study the crystallization kinetics. Based on these models, the activation energy of crystallization (E), the frequency factor () and the crystallization rate constant (k) were calculated. A subsequent study was followed to determine the Avrami exponent and the crystallized fraction. The crystallographic phases were determined by XRD and the microstructure of samples, treated between 400-900 ºC, was observed by optical and electronic microscopy.
Fil: Benavidez, Edgardo. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento de Ingeniería Metalúrgica. Centro DEYTEMA; Argentina.
Fil: Santini, Leandro. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento Metalurgia. Centro DEYTEMA; Argentina.
Fil: Brandaleze, Elena. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Departamento Metalurgia. Centro DEYTEMA; Argentina.
description In the present work a casting powder containing ≈ 36 wt% SiO2, ≈ 31 wt% CaO, 13 wt% Na2O, and 10 wt% CaF2, was used as starting material. A mass of 10 g of the mould powder was placed in a graphite crucible and melted at 1300°C. After 15 minutes at this temperature, the melt was poured onto a stainless steel inclined plate. By this method, solid glass layers were produced, which were sectioned into bars 10-15 mm in length to be used in dilatometric tests. Some of these bars were ground to powder to perform DTA runs. Both tests (DTA and dilatometry) were carried out at different heating rates: 5, 10 and 15 ºC/min, in air atmosphere, up to 900°C. Data of glass transition temperature (Tg), and crystallization peak temperature (Tc) were obtained from DTA and dilatometric runs. From these data, several non-isothermal methods based on Kissinger, Augis-Bennet, Ozawa, and Cheng models, were used to study the crystallization kinetics. Based on these models, the activation energy of crystallization (E), the frequency factor () and the crystallization rate constant (k) were calculated. A subsequent study was followed to determine the Avrami exponent and the crystallized fraction. The crystallographic phases were determined by XRD and the microstructure of samples, treated between 400-900 ºC, was observed by optical and electronic microscopy.
publishDate 2019
dc.date.none.fl_str_mv 2019-06-01
2022-12-14T14:32:58Z
2022-12-14T14:32:58Z
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info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://static.akcongress.com/downloads/jtacc/jtacc2019-boa.pdf
http://hdl.handle.net/20.500.12272/7389
identifier_str_mv chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://static.akcongress.com/downloads/jtacc/jtacc2019-boa.pdf
url http://hdl.handle.net/20.500.12272/7389
dc.language.none.fl_str_mv spa
language spa
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
2022-12-14T14:32:58Z
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Licencia CC BY NC ND
eu_rights_str_mv openAccess
rights_invalid_str_mv 2022-12-14T14:32:58Z
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Licencia CC BY NC ND
dc.format.none.fl_str_mv pdf
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dc.source.none.fl_str_mv reponame:Repositorio Institucional Abierto (UTN)
instname:Universidad Tecnológica Nacional
reponame_str Repositorio Institucional Abierto (UTN)
collection Repositorio Institucional Abierto (UTN)
instname_str Universidad Tecnológica Nacional
repository.name.fl_str_mv Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacional
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