|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Spark plasma sintering of ZrB2-ZrC powder mixtures synthesized by MA-SHS in air
| Title: | Spark plasma sintering of ZrB2-ZrC powder mixtures synthesized by MA-SHS in air |
| Authors: | Tsuchida, Takeshi Browse this author | | Yamamoto, Satoshi Browse this author |
| Keywords: | Mechanical activation (MA) | | Self-propagating High-temperature Synthesis (SHS) | | Spark plasma sintering (SPS) | | Ball milling; ZrB2-ZrC composite | | Zr/B/C powder mixtures |
| Issue Date: | Feb-2007 |
| Publisher: | Springer |
| Journal Title: | Journal of Materials Science |
| Volume: | 42 |
| Issue: | 3 |
| Start Page: | 772 |
| End Page: | 778 |
| Publisher DOI: | 10.1007/s10853-006-0719-y |
| Abstract: | Mechanical activation-assisted self-propagating high-temperature synthesis (MA-SHS) in air was successfully applied to the synthesis of the powder mixtures of ZrB2 and ZrC as a precursor of the ZrB2–ZrC composite. When the powder mixtures of Zr/B/C = 4/2/3–6/10/1 in molar ratio were mechanically activated (MA) by ball milling for 45–60 min and then exposed to air, they self-ignited spontaneously and the self-propagating high-temperature synthesis (SHS) was occurred to form ZrB2 and ZrC. The ZrB2–ZrC composites were produced from these MA-SHS powders by spark plasma sintering (SPS) at 1800 °C for 5–10 min and showed the fine and homogeneous microstructure composed of the <5 μm-sized grains. The mechanical properties of the composites evaluated by Vickers indentation method showed the values of Vickers hardness of 13.6–17.8 GPa and fracture toughness of 2.9–5.1 MPa·m1/2, depending on the molar ratio of ZrB2/ZrC. Thus, the better microstructure and mechanical properties of the ZrB2–ZrC composites were obtained from the MA-SHS powder mixtures, compared with those obtained from the MA powder, the mixing powder and the commercial powder mixtures. |
| Rights: | The original publication is available at www.springerlink.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/20027 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 土田 猛
|
