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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/10724

Title: Dilatometry of attrition milled nanocrystalline titanium powders
Authors: DABHADE, VV
PANIGRAHI, BB
GODKHINDI, MM
MOHAN, TRR
RAMAKRISHNAN, P
Keywords: sintering behavior
phase-transformation
Issue Date: 2006
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: MATERIALS RESEARCH BULLETIN, 41(11), 2111-2122
Abstract: The sintering behavior of nanosized titanium powders was investigated by ditatometry. The nanosized Ti powders (40 nm) were produced by the attrition milling of micron sized Ti powders (12 mu m) in Ar atmosphere. Sintering was carried out in Ar atmosphere in the temperature range of 450-1250 degrees C for nanosized Ti and 650-1250 degrees C for micron sized Ti by heating at 10 degrees C/min, up to the sintering temperature followed by isothermal holding for I It. The nanosized Ti powders exhibited a lower sintering onset temperature, larger shrinkage, larger shrinkage rate, and lower activation energy for sintering as compared to the micron sized Ti powders. The sintered micron sized Ti specimens exhibited both intraagglomerate and interagglomerate porosity while the nanosized Ti specimens exhibited well densified agglomerates (almost no interagglomerate porosity) and large intraagglomerate porosity. In nanosized Ti grain growth was found to take place beyond 700 degrees C and reached a maximum of 66 nm in samples sintered at 1100 degrees C. (c) 2006
URI: http://dx.doi.org/10.1016/j.materresbull.2006.03.030
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10724
http://hdl.handle.net/10054/10724
ISSN: 0025-5408
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