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Preparation of F e 3 S i‐ A l 2 O 3 Nanocomposite Powders by Mechanochemical Reaction of F e 3 O 4 ‐ S i‐ A l Powder Mixtures
Author(s) -
Jia Jiangang,
Guo Tieming,
Ren Shufang,
Lu Jinjun,
Ma Qin
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12008
Subject(s) - materials science , nanocomposite , chemical engineering , nanotechnology , engineering
Phase evolution and morphology of F e 3 O 4 ‐ S i‐ A l powder mixtures during ball milling from 30 min to 20 h were investigated. A 3‐h critical milling was necessary for the occurrence of mechanically activated combustion reaction. The reaction results in the formation of F e ( S i), F e 3 S i, and α‐ A l 2 O 3 . During ball milling from 3 to 20 h, F e ( S i) and F e 3 S i were combined into disordered F e 3 S i intermetallic and F e 3 S i‐ A l 2 O 3 composite powder was formed. The presence of in situ formed alumina leads to a decrease in crystallite and particle sizes. The F e 3 S i‐ A l 2 O 3 particles after milling for 20 h had a crystalline size of 10~12 nm.