View in EDS HTML Full Text PDF Full Text

Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites.

Saved in:
Bibliographic Details
Title: Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites.
Authors: Inocente, Jordana Mariot1 (AUTHOR) jordanainocente@gmail.com, da Costa, Renata Bochanoski1 (AUTHOR) renatacosta@unesc.net, Mattos, Ana Sônia1 (AUTHOR), Alcázar, Carmen2 (AUTHOR), Borrell, Amparo3 (AUTHOR) aborrell@upv.es, Moreno, Rodrigo2 (AUTHOR) rmoreno@icv.csic.es, Arcaro, Sabrina1 (AUTHOR), Montedo, Oscar Rubem Klegues1 (AUTHOR) rmoreno@icv.csic.es
Source: Materials (1996-1944). Feb2025, Vol. 18 Issue 3, p671. 20p.
Subjects: Slip casting, Nanocomposite materials, Specific gravity, Ceramic materials, Fracture toughness, Alumina composites
Abstract: Alumina is one of the most studied and used ceramic materials, but increasing its fracture toughness is still a challenge for many specific impact applications. Adding a second phase with a low coefficient of thermal expansion (CTE) to an alumina matrix can enhance the matrix's mechanical properties, reduce its sintering temperature, and increase its toughness by generating compressive stresses on the alumina particle surface. In this study, nanostructured alumina/eucryptite composites were prepared to achieve enhanced toughness. First, eucryptite (Li2O·Al2O3·2SiO2) nanoparticles were successfully synthesised via colloidal heterocoagulation. These nanoparticles were then used to reinforce alumina matrices through slip casting followed by conventional sintering. Complete crystallisation of eucryptite was achieved at 850 °C with a CTE of 0.46 × 10 −6 °C −¹. Transmission electron microscopy analysis revealed that the average particle size was 28.5 ± 14.5 nm. To achieve a relative density of 95.3%, the composite containing 5 vol.% eucryptite required sintering for 1 h at 1400 °C whereas pure alumina required 2 h at 1600 °C. This reduction in sintering temperature (by up to 200 °C) helped to improve the fracture toughness, with the alumina grain size decreasing from 2.3 to 0.9 µm. The advantages of the new composite are the more economically viable and environmentally friendly way of producing the lithium aluminosilicate nanoparticles, compared to the production of ceramic frits at high temperatures (~1500 °C). [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 182985983
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Inocente%2C+Jordana+Mariot%22">Inocente, Jordana Mariot</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jordanainocente@gmail.com</i><br /><searchLink fieldCode="AR" term="%22da+Costa%2C+Renata+Bochanoski%22">da Costa, Renata Bochanoski</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> renatacosta@unesc.net</i><br /><searchLink fieldCode="AR" term="%22Mattos%2C+Ana+Sônia%22">Mattos, Ana Sônia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Alcázar%2C+Carmen%22">Alcázar, Carmen</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Borrell%2C+Amparo%22">Borrell, Amparo</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> aborrell@upv.es</i><br /><searchLink fieldCode="AR" term="%22Moreno%2C+Rodrigo%22">Moreno, Rodrigo</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> rmoreno@icv.csic.es</i><br /><searchLink fieldCode="AR" term="%22Arcaro%2C+Sabrina%22">Arcaro, Sabrina</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Montedo%2C+Oscar+Rubem+Klegues%22">Montedo, Oscar Rubem Klegues</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> rmoreno@icv.csic.es</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Feb2025, Vol. 18 Issue 3, p671. 20p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Slip+casting%22">Slip casting</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Specific+gravity%22">Specific gravity</searchLink><br /><searchLink fieldCode="DE" term="%22Ceramic+materials%22">Ceramic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+toughness%22">Fracture toughness</searchLink><br /><searchLink fieldCode="DE" term="%22Alumina+composites%22">Alumina composites</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Alumina is one of the most studied and used ceramic materials, but increasing its fracture toughness is still a challenge for many specific impact applications. Adding a second phase with a low coefficient of thermal expansion (CTE) to an alumina matrix can enhance the matrix's mechanical properties, reduce its sintering temperature, and increase its toughness by generating compressive stresses on the alumina particle surface. In this study, nanostructured alumina/eucryptite composites were prepared to achieve enhanced toughness. First, eucryptite (Li2O·Al2O3·2SiO2) nanoparticles were successfully synthesised via colloidal heterocoagulation. These nanoparticles were then used to reinforce alumina matrices through slip casting followed by conventional sintering. Complete crystallisation of eucryptite was achieved at 850 °C with a CTE of 0.46 × 10 −6 °C −¹. Transmission electron microscopy analysis revealed that the average particle size was 28.5 ± 14.5 nm. To achieve a relative density of 95.3%, the composite containing 5 vol.% eucryptite required sintering for 1 h at 1400 °C whereas pure alumina required 2 h at 1600 °C. This reduction in sintering temperature (by up to 200 °C) helped to improve the fracture toughness, with the alumina grain size decreasing from 2.3 to 0.9 µm. The advantages of the new composite are the more economically viable and environmentally friendly way of producing the lithium aluminosilicate nanoparticles, compared to the production of ceramic frits at high temperatures (~1500 °C). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=182985983
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/ma18030671
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 20
        StartPage: 671
    Subjects:
      – SubjectFull: Slip casting
        Type: general
      – SubjectFull: Nanocomposite materials
        Type: general
      – SubjectFull: Specific gravity
        Type: general
      – SubjectFull: Ceramic materials
        Type: general
      – SubjectFull: Fracture toughness
        Type: general
      – SubjectFull: Alumina composites
        Type: general
    Titles:
      – TitleFull: Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Inocente, Jordana Mariot
      – PersonEntity:
          Name:
            NameFull: da Costa, Renata Bochanoski
      – PersonEntity:
          Name:
            NameFull: Mattos, Ana Sônia
      – PersonEntity:
          Name:
            NameFull: Alcázar, Carmen
      – PersonEntity:
          Name:
            NameFull: Borrell, Amparo
      – PersonEntity:
          Name:
            NameFull: Moreno, Rodrigo
      – PersonEntity:
          Name:
            NameFull: Arcaro, Sabrina
      – PersonEntity:
          Name:
            NameFull: Montedo, Oscar Rubem Klegues
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 02
              Text: Feb2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 19961944
          Numbering:
            – Type: volume
              Value: 18
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Materials (1996-1944)
              Type: main
ResultId 1