Title of article :
Sintering and grain growth kinetics of ball milled nanocrystalline nickel powder
Author/Authors :
Panigrahi، نويسنده , , Bharat B.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
7
From page :
7
To page :
13
Abstract :
Detailed studies on the sintering and grain growth of ball milled nanocrystalline nickel power were carried out. The analysis of grain coarsening process was found to be very helpful for understanding the sintering mechanisms. The explosive grain growth was observed at higher temperature and the activation energy of grain growth increased with increasing temperature. The grain boundary diffusion was identified as grain growth mechanism at lower temperatures. This powder showed very low activation energy of sintering (66.2 ± 3 kJ mol−1). The surface diffusion was found as dominating mechanism through out the sintering. At higher temperatures lattice diffusion was found to be controlling both, sintering and grain growth.
Keywords :
grain growth , Sintering , dilatometry , Neck ratio , diffusion
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Serial Year :
2007
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Record number :
2154232
Link To Document :
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