In-situ reduction of mo-based composite particles during laser powder bed fusion

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Raw powders are processed in water during the freeze-dry pulsated orifice ejection method (FD-POEM), leading to the inclusion of oxygen impurities. This study proposes a strategy for removing the oxygen content and enhancing the mechanical performance of laser powder bed fusion (L-PBF) builds from powders using carbon nanotubes (CNTs) and H2 reduction. Spherical 1.5 wt.% CNT/Mo composite powders with uniform dispersion were fabricated via FD-POEM. The quantity of MoO2 decreased significantly, and a hexagonally structured Mo2C phase was simultaneously formed in the L-PBF build. The Mo2C with network structure was distributed along the boundaries of equiaxed Mo grains, leading to an increased Vickers hardness of the matrix. This study demonstrates the feasibility of fabricating oxygen-free and high-strength refractory parts during L-PBF for ultrahigh-temperature applications.

Original languageEnglish
Article number702
Issue number6
Publication statusPublished - 2021 Jun


  • Carbon nanotubes
  • Freeze-dry pulsated orifice ejection method (FD-POEM)
  • Laser powder bed fusion (L-PBF)
  • Microstructure
  • Molybdenum

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry


Dive into the research topics of 'In-situ reduction of mo-based composite particles during laser powder bed fusion'. Together they form a unique fingerprint.

Cite this