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Characteristics of powder metallurgy pure titanium matrix composite reinforced with multi-wall carbon nanotubes

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Title: Characteristics of powder metallurgy pure titanium matrix composite reinforced with multi-wall carbon nanotubes
Authors: Kondoh, Katsuyoshi Browse this author
Threrujirapapong, Thotsaphon Browse this author
Imai, Hisashi Browse this author
Umeda, Junko Browse this author
Fugetsu, Bunshi Browse this author
Keywords: Ti powder
Carbon nanotubes
Spark plasma sintering
Extrusion
TiC
Metal-matrix composites (MMCs)
Stress/strain curves
X-ray diffraction (XRD)
Sintering
Issue Date: Jun-2009
Publisher: Elsevier Ltd.
Journal Title: Composites Science and Technology
Volume: 69
Issue: 7-8
Start Page: 1077
End Page: 1081
Publisher DOI: 10.1016/j.compscitech.2009.01.026
Abstract: By using pure titanium powder coated with un-bundled multi-wall carbon nanotubes (MWCNTs) via wet process, powder metallurgy (P/M) titanium matrix composite (TMC) reinforced with the CNTs was prepared by spark plasma sintering (SPS) and subsequently hot extrusion process. The microstructure and mechanical properties of P/M pure titanium and reinforced with CNTs were evaluated. The distribution of CNTs and in-situ formed titanium carbide (TiC) compounds during sintering was investigated by optical and scanning electron microscopy (SEM) equipped with EDS analyzer. The mechanical properties of TMC were significantly improved by the additive of CNTs. For example, when employing the pure titanium composite powder coated with CNTs of 0.35 mass%, the increase of tensile strength and yield stress of the extruded TMC was 157 MPa and 169 MPa, respectively, compared to those of extruded titanium materials with no CNT additive. Fractured surfaces of tensile specimens were analyzed by SEM, and the uniform distribution of CNTs and TiC particles, being effective for the dispersion strengthening, at the surface of the TMC were obviously observed.
Type: article (author version)
URI: http://hdl.handle.net/2115/38627
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 古月 文志

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