Formation of nanodispersoids in Fe-Cr-Al/30%TiB2 composite system during mechanical alloying
- Formation of nanodispersoids in Fe-Cr-Al/30%TiB2 composite system during mechanical alloying
- 사찬; 박종우
- Metal matrix composite; Nanostructured materials; Mechanical alloying; Electron microprobe analysis; TiB2/Fe-Cr-Al
- Issue Date
- Journal of alloys and compounds
- VOL 485, 724-729
- Mechanical alloying is an effective processing technology which allows the synthesis of nanocrystalline
composite materials. In this study, a nanocrystalline Fe–Cr–Al/30%TiB2 composite material is synthesized
without process control agents by the mechanical alloying process using a planetary high-energy ball mill.
Crystalline (or grain) size reduction and dispersion behavior of brittle TiB2 powder during ball milling are
investigated together withmechanical alloying behavior of ductilemetallic matrix powder for synthesis of
the composite. Mechanical alloying between metallic elements is almost completed after approximately
8 h milling. The crystalline size of TiB2 decreases to 36nm after 48 h of ball milling, while the average
particle size of the composite powder increases in comparison with the initial size. Transmission electron
microscopy reveals formation of TiB2 nanodispersoids of size around 50nm after 48 h milling.
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