In situ synthesized TiC/Mo-based composites via laser powder bed fusion

Weiwei Zhou; Xiaohao Sun; Keiko Kikuchi; Naoyuki Nomura; Kyosuke Yoshimi; Akira Kawasaki

doi:10.1016/j.matdes.2018.03.001

In situ synthesized TiC/Mo-based composites via laser powder bed fusion

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

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

A strategy utilizing carbon nanotubes (CNTs) was put forward to synthesize in situ TiC/Mo-based composites via laser powder bed fusion (laser PBF). The functionalized CNTs were dispersed with MoTiAl powders under electrostatic attraction by heteroagglomeration. During laser PBF, individual CNTs reacted with Ti elements and were completely transformed into monocrystalline TiC. Those TiC reinforcements were homogeneously dispersed and intimately contacted the matrix, giving rise to the morphological evolution of a MoTiAl matrix from the nearly columnar to fine equiaxed grains as well as improved mechanical performance. Our finding offers significant guidance for designing and producing advanced Mo-based composites in the application of heat-resistant materials.

Original language	English
Pages (from-to)	116-124
Number of pages	9
Journal	Materials and Design
Volume	146
DOIs	https://doi.org/10.1016/j.matdes.2018.03.001
Publication status	Published - 2018 May 15

Keywords

Carbon nanotubes
Laser powder bed fusion (laser PBF)
Metal matrix composites (MMCs)
Microstructure
Molybdenum

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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title = "In situ synthesized TiC/Mo-based composites via laser powder bed fusion",

abstract = "A strategy utilizing carbon nanotubes (CNTs) was put forward to synthesize in situ TiC/Mo-based composites via laser powder bed fusion (laser PBF). The functionalized CNTs were dispersed with MoTiAl powders under electrostatic attraction by heteroagglomeration. During laser PBF, individual CNTs reacted with Ti elements and were completely transformed into monocrystalline TiC. Those TiC reinforcements were homogeneously dispersed and intimately contacted the matrix, giving rise to the morphological evolution of a MoTiAl matrix from the nearly columnar to fine equiaxed grains as well as improved mechanical performance. Our finding offers significant guidance for designing and producing advanced Mo-based composites in the application of heat-resistant materials.",

keywords = "Carbon nanotubes, Laser powder bed fusion (laser PBF), Metal matrix composites (MMCs), Microstructure, Molybdenum",

author = "Weiwei Zhou and Xiaohao Sun and Keiko Kikuchi and Naoyuki Nomura and Kyosuke Yoshimi and Akira Kawasaki",

year = "2018",

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journal = "Materials and Design",

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T1 - In situ synthesized TiC/Mo-based composites via laser powder bed fusion

AU - Zhou, Weiwei

AU - Sun, Xiaohao

AU - Kikuchi, Keiko

AU - Nomura, Naoyuki

AU - Yoshimi, Kyosuke

AU - Kawasaki, Akira

PY - 2018/5/15

Y1 - 2018/5/15

N2 - A strategy utilizing carbon nanotubes (CNTs) was put forward to synthesize in situ TiC/Mo-based composites via laser powder bed fusion (laser PBF). The functionalized CNTs were dispersed with MoTiAl powders under electrostatic attraction by heteroagglomeration. During laser PBF, individual CNTs reacted with Ti elements and were completely transformed into monocrystalline TiC. Those TiC reinforcements were homogeneously dispersed and intimately contacted the matrix, giving rise to the morphological evolution of a MoTiAl matrix from the nearly columnar to fine equiaxed grains as well as improved mechanical performance. Our finding offers significant guidance for designing and producing advanced Mo-based composites in the application of heat-resistant materials.

AB - A strategy utilizing carbon nanotubes (CNTs) was put forward to synthesize in situ TiC/Mo-based composites via laser powder bed fusion (laser PBF). The functionalized CNTs were dispersed with MoTiAl powders under electrostatic attraction by heteroagglomeration. During laser PBF, individual CNTs reacted with Ti elements and were completely transformed into monocrystalline TiC. Those TiC reinforcements were homogeneously dispersed and intimately contacted the matrix, giving rise to the morphological evolution of a MoTiAl matrix from the nearly columnar to fine equiaxed grains as well as improved mechanical performance. Our finding offers significant guidance for designing and producing advanced Mo-based composites in the application of heat-resistant materials.

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KW - Laser powder bed fusion (laser PBF)

KW - Metal matrix composites (MMCs)

KW - Microstructure

KW - Molybdenum

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