Low temperature fabrication of transparent magnesium aluiminate spinel by high pressure spark plasma sintering

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Magnesium aluminate spinel specimens were fabricated at temperatures lower than 1100ºC using a high pressure (up to 650 MPa) SPS approach. Nanostructured ceramics with grain size of 80-100 nm, in-line transmittance higher than 80% in the visible range and hardness higher than 18 GPa were successfully fabricated under applied pressure of 650 MPa at 1025ºC. Vickers hardness values obtained at wide loading range from 100 to 2000 g, remained constant and for the grain size between tens of microns and 80 nm the hardness values strictly follow the Hall- Petch relation. The fracture toughness of the SPS-processed magnesium aluminate spinel obtained by measuring the extent of cracking associated with a Vickers indentation is about 2.7 MPa·m1/2 and doesn’t depend on the average grain size in the 80-100 nm range.

Original languageEnglish
Title of host publicationAdvanced Processing and Manufacturing Technologies for Nanostructured and Multifunctional Materials III - A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
EditorsTatsuki Ohji, Mrityunjay Singh, Michael Halbig, Kyoung Il Moon
PublisherAmerican Ceramic Society
Pages27-35
Number of pages9
Edition5
ISBN (Electronic)9781119274995, 9781119320135, 9781119320227, 9781119320241, 9781119321705, 9781119321743, 9781119321781
DOIs
StatePublished - 1 Jan 2017
EventAdvanced Processing and Manufacturing Technologies for Nanostructured and Multifunctional Materials III - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 - Daytona Beach, United States
Duration: 24 Jan 201629 Jan 2016

Publication series

NameCeramic Engineering and Science Proceedings
Number5
Volume37
ISSN (Print)0196-6219

Conference

ConferenceAdvanced Processing and Manufacturing Technologies for Nanostructured and Multifunctional Materials III - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
Country/TerritoryUnited States
CityDaytona Beach
Period24/01/1629/01/16

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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