Replacement of fluorine in mould powders: influence on the crystallization kinetics

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 mould powders were prepared using different raw materials. One powder was fluorine-containing and the others were free-F. The total fluorine content (approx. 10 wt%) was replaced by different percentages of boron, sodium and lithium oxides. Fluorspar (CaF2), borax anhydrous (Na2B4O7), and lithium carbonate (Li2CO3) were employed as source of fluorine, boron, and lithium, respectively. These powders were milling during 2 hours, then were melted at 1300°C and finally fast cooled onto a stainless steel plate. The amorphous solid layers as obtained were milling to produce glass powders which were tested by DTA at different heating rates: 5, 10, and 15°C/min. Several non-isothermal methods (Kissinger, Augis-Bennet, Ozawa, Cheng) were applied to study their kinetics of crystallization. From these models, different parameters associated to crystal growth, such as the activation energy (Ec), the frequency factor () and the nucleation rate (kc), were determined. Crystallographic phases and crystal size distribution were determined by X-ray diffraction and microscopic observation techniques.
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
kinetics
differential
thermal analysis
Nivel de accesibilidad
acceso abierto
Condiciones de uso
2022-12-14T14:49:57Z
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/7390
Acceder
id RIAUTN_38f5395949e1de270fc70af3083ff564
oai_identifier_str oai:ria.utn.edu.ar:20.500.12272/7390
network_acronym_str RIAUTN
repository_id_str a
network_name_str Repositorio Institucional Abierto (UTN)
spelling Replacement of fluorine in mould powders: influence on the crystallization kineticsBenavidez, EdgardoSantini, LeandroBrandaleze, Elenamould fluxescrystallizationkineticsdifferentialthermal analysisIn the present work mould powders were prepared using different raw materials. One powder was fluorine-containing and the others were free-F. The total fluorine content (approx. 10 wt%) was replaced by different percentages of boron, sodium and lithium oxides. Fluorspar (CaF2), borax anhydrous (Na2B4O7), and lithium carbonate (Li2CO3) were employed as source of fluorine, boron, and lithium, respectively. These powders were milling during 2 hours, then were melted at 1300°C and finally fast cooled onto a stainless steel plate. The amorphous solid layers as obtained were milling to produce glass powders which were tested by DTA at different heating rates: 5, 10, and 15°C/min. Several non-isothermal methods (Kissinger, Augis-Bennet, Ozawa, Cheng) were applied to study their kinetics of crystallization. From these models, different parameters associated to crystal growth, such as the activation energy (Ec), the frequency factor () and the nucleation rate (kc), were determined. Crystallographic phases and crystal size distribution were determined by X-ray diffraction and microscopic observation techniques.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.Springer2022-12-14T14:49:57Z2022-12-14T14:49:57Z2019-06-01info: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/20.500.12272/7390spainfo:eu-repo/semantics/openAccess2022-12-14T14:49:57Zhttp://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 Nacional2026-09-24T12:45:29Zoai:ria.utn.edu.ar:20.500.12272/7390instacron: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 12:45:29.801Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv Replacement of fluorine in mould powders: influence on the crystallization kinetics
title Replacement of fluorine in mould powders: influence on the crystallization kinetics
spellingShingle Replacement of fluorine in mould powders: influence on the crystallization kinetics
Benavidez, Edgardo
mould fluxes
crystallization
kinetics
differential
thermal analysis
title_short Replacement of fluorine in mould powders: influence on the crystallization kinetics
title_full Replacement of fluorine in mould powders: influence on the crystallization kinetics
title_fullStr Replacement of fluorine in mould powders: influence on the crystallization kinetics
title_full_unstemmed Replacement of fluorine in mould powders: influence on the crystallization kinetics
title_sort Replacement of fluorine in mould powders: influence on the crystallization kinetics
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
kinetics
differential
thermal analysis
topic mould fluxes
crystallization
kinetics
differential
thermal analysis
dc.description.none.fl_txt_mv In the present work mould powders were prepared using different raw materials. One powder was fluorine-containing and the others were free-F. The total fluorine content (approx. 10 wt%) was replaced by different percentages of boron, sodium and lithium oxides. Fluorspar (CaF2), borax anhydrous (Na2B4O7), and lithium carbonate (Li2CO3) were employed as source of fluorine, boron, and lithium, respectively. These powders were milling during 2 hours, then were melted at 1300°C and finally fast cooled onto a stainless steel plate. The amorphous solid layers as obtained were milling to produce glass powders which were tested by DTA at different heating rates: 5, 10, and 15°C/min. Several non-isothermal methods (Kissinger, Augis-Bennet, Ozawa, Cheng) were applied to study their kinetics of crystallization. From these models, different parameters associated to crystal growth, such as the activation energy (Ec), the frequency factor () and the nucleation rate (kc), were determined. Crystallographic phases and crystal size distribution were determined by X-ray diffraction and microscopic observation techniques.
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 mould powders were prepared using different raw materials. One powder was fluorine-containing and the others were free-F. The total fluorine content (approx. 10 wt%) was replaced by different percentages of boron, sodium and lithium oxides. Fluorspar (CaF2), borax anhydrous (Na2B4O7), and lithium carbonate (Li2CO3) were employed as source of fluorine, boron, and lithium, respectively. These powders were milling during 2 hours, then were melted at 1300°C and finally fast cooled onto a stainless steel plate. The amorphous solid layers as obtained were milling to produce glass powders which were tested by DTA at different heating rates: 5, 10, and 15°C/min. Several non-isothermal methods (Kissinger, Augis-Bennet, Ozawa, Cheng) were applied to study their kinetics of crystallization. From these models, different parameters associated to crystal growth, such as the activation energy (Ec), the frequency factor () and the nucleation rate (kc), were determined. Crystallographic phases and crystal size distribution were determined by X-ray diffraction and microscopic observation techniques.
publishDate 2019
dc.date.none.fl_str_mv 2019-06-01
2022-12-14T14:49:57Z
2022-12-14T14:49:57Z
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_5794
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/20.500.12272/7390
identifier_str_mv chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://static.akcongress.com/downloads/jtacc/jtacc2019-boa.pdf
url http://hdl.handle.net/20.500.12272/7390
dc.language.none.fl_str_mv spa
language spa
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
2022-12-14T14:49:57Z
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 2022-12-14T14:49:57Z
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
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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
repository.mail.fl_str_mv gestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.ar
_version_ 1877230899302498304
score 13.24418

Publicaciones similares