Novel laser additive-manufactured Mo-based composite with enhanced mechanical and oxidation properties

Weiwei Zhou, Keiko Kikuchi, Naoyuki Nomura, Kyosuke Yoshimi, Akira Kawasaki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A novel Mo-based composite with simultaneously improved mechanical and oxidation properties was fabricated by laser powder bed fusion (L-PBF), using uniform Al2O3-nanoparticle-decorated MoTiAl powders bridged by functionalized carbon nanotubes. A tight ceramic coating ∼2.57 μm in thickness consisting of an α-Al2O3 matrix with dispersed TiC particles was formed on the surface of the Al2O3-CNT/MoTiAl composite, which has been proved to effectively increase resistance to oxidation at 1173 K. Meanwhile, the nanoparticles were homogenously dispersed and tightly contacted with the matrix, giving rise to an enhanced Vickers hardness. This work shed light on designing and producing high-performance Mo-based composites for application to ultrahigh-temperature materials.

Original languageEnglish
Article number152981
JournalJournal of Alloys and Compounds
Volume819
DOIs
Publication statusPublished - 2020 Apr 5

Keywords

  • Carbon nanotubes
  • Laser powder bed fusion (L-PBF)
  • Mechanical property
  • Metal matrix composites (MMCs)
  • Oxidation resistance

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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