Low (and negative) thermal expansion Al<SUB>2</SUB>TiO<SUB>5</SUB> materials and Al<SUB>2</SUB>TiO<SUB>5</SUB> - 3Al<SUB>2</SUB>O<SUB>3</SUB>.2SiO<SUB>2</SUB> - ZrTiO<SUB>4</SUB> composite materials : Processing, initial zircon proportion effect, and properties

Aluminum titanate (Al2TiO5) materials and aluminum titanate - mullite- zirconium titanate (Al2TiO5 - 3Al2O3.2SiO2 - ZrTiO4) composite materials were successfully processed from fine commercial powders and characterized. This was achieved by zircon (ZrSiO4) addition to stoichiometric alumina - titani...

Descripción completa

Detalles Bibliográficos
Autores principales: Violini, María Agustina, Hernández, María Florencia, Gauna, Matías Roberto, Suárez, Gustavo, Conconi, María Susana, Rendtorff Birrer, Nicolás Maximiliano
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Exactas
Aleaciones de Cerámica y Metal
aluminum titanate, structural ceramics, composite ceramics, low thermal expansion ceramics, processing, properties
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/68851
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-68851
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Aleaciones de Cerámica y Metal
aluminum titanate, structural ceramics, composite ceramics, low thermal expansion ceramics, processing, properties
spellingShingle Ciencias Exactas
Aleaciones de Cerámica y Metal
aluminum titanate, structural ceramics, composite ceramics, low thermal expansion ceramics, processing, properties
Violini, María Agustina
Hernández, María Florencia
Gauna, Matías Roberto
Suárez, Gustavo
Conconi, María Susana
Rendtorff Birrer, Nicolás Maximiliano
Low (and negative) thermal expansion Al<SUB>2</SUB>TiO<SUB>5</SUB> materials and Al<SUB>2</SUB>TiO<SUB>5</SUB> - 3Al<SUB>2</SUB>O<SUB>3</SUB>.2SiO<SUB>2</SUB> - ZrTiO<SUB>4</SUB> composite materials : Processing, initial zircon proportion effect, and properties
topic_facet Ciencias Exactas
Aleaciones de Cerámica y Metal
aluminum titanate, structural ceramics, composite ceramics, low thermal expansion ceramics, processing, properties
description Aluminum titanate (Al2TiO5) materials and aluminum titanate - mullite- zirconium titanate (Al2TiO5 - 3Al2O3.2SiO2 - ZrTiO4) composite materials were successfully processed from fine commercial powders and characterized. This was achieved by zircon (ZrSiO4) addition to stoichiometric alumina - titania mixtures. Zircon addition was the principal processing variable explored. This additive stabilizes the unstable aluminum titanate phase, enhances the sintering process, restricts microcrack development and improves the mechanical properties of the bulk material, but has a slight detrimental effect on its thermal expansion behavior (αapp from −1.5 to 2.5×10−6 °C−1 in the RT-800 °C range). With a clear microstructure configuration change, all the technological properties are directly (linearly) correlated with zircon proportion in the initial formulation in the range between 5 and 30 wt%. Developed phases were established, relatively dense ceramics were produced, and complex microstructures with multiphasic interlocked grains were identified. Also, an interconnected microcrack matrix was observed with no material integrity loss which explained the low or even negative thermal expansion behaviors observed in the developed materials. This, together with the mechanical behavior detected, encourages structural applications with high thermomechanical solicitations. The triplex composite material presented an excellent thermomechanical behavior and low porosity, 48 MPa flexural strength, low stiffness and high sintering grade with low thermal expansion.
format Articulo
Preprint
author Violini, María Agustina
Hernández, María Florencia
Gauna, Matías Roberto
Suárez, Gustavo
Conconi, María Susana
Rendtorff Birrer, Nicolás Maximiliano
author_facet Violini, María Agustina
Hernández, María Florencia
Gauna, Matías Roberto
Suárez, Gustavo
Conconi, María Susana
Rendtorff Birrer, Nicolás Maximiliano
author_sort Violini, María Agustina
title Low (and negative) thermal expansion Al<SUB>2</SUB>TiO<SUB>5</SUB> materials and Al<SUB>2</SUB>TiO<SUB>5</SUB> - 3Al<SUB>2</SUB>O<SUB>3</SUB>.2SiO<SUB>2</SUB> - ZrTiO<SUB>4</SUB> composite materials : Processing, initial zircon proportion effect, and properties
title_short Low (and negative) thermal expansion Al<SUB>2</SUB>TiO<SUB>5</SUB> materials and Al<SUB>2</SUB>TiO<SUB>5</SUB> - 3Al<SUB>2</SUB>O<SUB>3</SUB>.2SiO<SUB>2</SUB> - ZrTiO<SUB>4</SUB> composite materials : Processing, initial zircon proportion effect, and properties
title_full Low (and negative) thermal expansion Al<SUB>2</SUB>TiO<SUB>5</SUB> materials and Al<SUB>2</SUB>TiO<SUB>5</SUB> - 3Al<SUB>2</SUB>O<SUB>3</SUB>.2SiO<SUB>2</SUB> - ZrTiO<SUB>4</SUB> composite materials : Processing, initial zircon proportion effect, and properties
title_fullStr Low (and negative) thermal expansion Al<SUB>2</SUB>TiO<SUB>5</SUB> materials and Al<SUB>2</SUB>TiO<SUB>5</SUB> - 3Al<SUB>2</SUB>O<SUB>3</SUB>.2SiO<SUB>2</SUB> - ZrTiO<SUB>4</SUB> composite materials : Processing, initial zircon proportion effect, and properties
title_full_unstemmed Low (and negative) thermal expansion Al<SUB>2</SUB>TiO<SUB>5</SUB> materials and Al<SUB>2</SUB>TiO<SUB>5</SUB> - 3Al<SUB>2</SUB>O<SUB>3</SUB>.2SiO<SUB>2</SUB> - ZrTiO<SUB>4</SUB> composite materials : Processing, initial zircon proportion effect, and properties
title_sort low (and negative) thermal expansion al<sub>2</sub>tio<sub>5</sub> materials and al<sub>2</sub>tio<sub>5</sub> - 3al<sub>2</sub>o<sub>3</sub>.2sio<sub>2</sub> - zrtio<sub>4</sub> composite materials : processing, initial zircon proportion effect, and properties
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/68851
work_keys_str_mv AT violinimariaagustina lowandnegativethermalexpansionalsub2subtiosub5submaterialsandalsub2subtiosub5sub3alsub2subosub3sub2siosub2subzrtiosub4subcompositematerialsprocessinginitialzirconproportioneffectandproperties
AT hernandezmariaflorencia lowandnegativethermalexpansionalsub2subtiosub5submaterialsandalsub2subtiosub5sub3alsub2subosub3sub2siosub2subzrtiosub4subcompositematerialsprocessinginitialzirconproportioneffectandproperties
AT gaunamatiasroberto lowandnegativethermalexpansionalsub2subtiosub5submaterialsandalsub2subtiosub5sub3alsub2subosub3sub2siosub2subzrtiosub4subcompositematerialsprocessinginitialzirconproportioneffectandproperties
AT suarezgustavo lowandnegativethermalexpansionalsub2subtiosub5submaterialsandalsub2subtiosub5sub3alsub2subosub3sub2siosub2subzrtiosub4subcompositematerialsprocessinginitialzirconproportioneffectandproperties
AT conconimariasusana lowandnegativethermalexpansionalsub2subtiosub5submaterialsandalsub2subtiosub5sub3alsub2subosub3sub2siosub2subzrtiosub4subcompositematerialsprocessinginitialzirconproportioneffectandproperties
AT rendtorffbirrernicolasmaximiliano lowandnegativethermalexpansionalsub2subtiosub5submaterialsandalsub2subtiosub5sub3alsub2subosub3sub2siosub2subzrtiosub4subcompositematerialsprocessinginitialzirconproportioneffectandproperties
bdutipo_str Repositorios
_version_ 1764820481593049089

Ejemplares similares