Synthesis and characterization of a nearly single bulk ti2aln max phase obtained from ti/aln powder mixture through spark plasma sintering

Christopher Salvo, Ernesto Chicardi, Rosalía Poyato, Cristina García-Garrido, José Antonio Jiménez, Cristina López-Pernía, Pablo Tobosque, Ramalinga Viswanathan Mangalaraja

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

MAX phases are an advanced class of ceramics based on ternary carbides or nitrides that combine some of the ceramic and metallic properties, which make them potential candidate materials for many engineering applications under severe conditions. The present work reports the successful synthesis of nearly single bulk Ti2AlN MAX phase (>98% purity) through solid-state reaction and from a Ti and AlN powder mixture in a molar ratio of 2:1 as starting materials. The mixture of Ti and AlN powders was subjected to reactive spark plasma sintering (SPS) under 30 MPa at 1200C and 1300C for 10 min in a vacuum atmosphere. It was found that the massive formation of Al2O3 particles at the grain boundaries during sintering inhibits the development of the Ti2AlN MAX phase in the outer zone of the samples. The effect of sintering temperature on the microstructure and mechanical properties of the Ti2AlN MAX phase was investigated and discussed.

Original languageEnglish
Article number2217
JournalMaterials
Volume14
Issue number9
DOIs
StatePublished - 2021
Externally publishedYes

Keywords

  • MAX phase
  • Spark plasma sintering
  • TiAlN

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