Journal
CERAMICS INTERNATIONAL
Volume 38, Issue 1, Pages 217-222Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2011.06.053
Keywords
Composites; Hardness; Nitride; Structural application
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A Ti/AlN powder mixture with a molar ratio of 2:1 was consolidated by electric current assisted sintering (ECAS) using a special designed graphite die which can give rise to a huge temperature gradient along the vertical direction in the sintering compact. By this way, a continuous microstructural evolution during the formation of Ti2AlN was observed. At 1200 degrees C, a Ti2AlN TiN composite was prepared through the in situ decomposition of Ti2AlN. The SEM and XRD results revealed that a continuous variation of Ti2AlN and TiN phase content was achieved. The gradual hardness distribution across the entire composite further indicated that a continuous functionally graded Ti2AlN/TiN material was obtained rapidly by taking advantage of the ECAS method. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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