Formation of nanodispersoids in Fe-Cr-Al/30%TiB2 composite system during mechanical alloying

Title
Formation of nanodispersoids in Fe-Cr-Al/30%TiB2 composite system during mechanical alloying
Authors
사찬박종우
Keywords
Metal matrix composite; Nanostructured materials; Mechanical alloying; Electron microprobe analysis; TiB2/Fe-Cr-Al
Issue Date
2009-10
Publisher
Journal of alloys and compounds
Citation
VOL 485, 724-729
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/36471
ISSN
0925-8388
Appears in Collections:
KIST Publication > Article
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