Synthesis and Characterization of Spark Plasma Sintered FeAl and In situ FeAl–Al2O3 Composite

In the present work, nanocrystalline FeAl and FeAl–Al 2 O 3 composite were synthesized by high energy ball milling and subsequent compaction by spark plasma sintering. Microstructural changes during all stages of processing are studied using X-ray analysis. After 20 h of milling, the disordered FeAl...

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Bibliographic Details
Published inTransactions of the Indian Institute of Metals Vol. 66; no. 4; pp. 419 - 424
Main Authors Chawake, Niraj, Paleti, Sri Harish Kumar, Murty, B. S., Kottada, Ravi S.
Format Journal Article
LanguageEnglish
Published India Springer-Verlag 01.08.2013
Subjects
Chemistry and Materials Science
Corrosion and Coatings
Materials Science
Metallic Materials
Technical Paper
Tribology
Iron aluminide
Spark plasma sintering
Reactive milling
Disordering
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Summary:In the present work, nanocrystalline FeAl and FeAl–Al 2 O 3 composite were synthesized by high energy ball milling and subsequent compaction by spark plasma sintering. Microstructural changes during all stages of processing are studied using X-ray analysis. After 20 h of milling, the disordered FeAl and some amount of Fe rich solid solution was obtained in both of these compositions. Subsequent heat treatment results in formation of ordered FeAl. However, disordering of FeAl was observed in both compositions after spark plasma sintering. Nanocrystallinity is retained in both the compositions even after sintering at high temperature of 1,000 °C. Very high hardness of ~575 HV 1 and ~600 HV 1 was exhibited by FeAl and FeAl–Al 2 O 3 composite.
ISSN:0972-2815
0975-1645
DOI:10.1007/s12666-013-0279-1