Chatterjee, P and Sen Gupta , S P and Sen , S (2001) Particle fracture and plastic deformation in vanadium pentoxide powders induced by high energy vibrational ball-mill. Bulletin of Materials Science, 24 (2). 173 -180. ISSN 0250-4707

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Abstract

An X-ray powder profile analysis in vanadium pentoxide powder milled in a high energy vibrational halt-mill for different lengths of time (0-250 h), is presented, The strain and size induced broadening of the Bragg reflection for two different crystallographic directions ([001] and [100]) was determined by Warren-Averbach analysis using a pattern-decomposition method assuming a Pseudo-Voigt function, The deformation process caused a decrease in the crystallite size and a saturation of crystallite size of similar to 10 nm was reached after severe milling. The initial stages of milling indicated a propensity of size-broadening due to Fracture DF the powder particles caused by repeated ball-to-powder impact whereas with increasing milling time microstrain broadening was predominant. WA analysis indicated significant plastic strain along with spatial confinement of the internal strain fields in the crystallite interfaces, Significant strain anisotropy was noticed in the different crystallographic directions. A near-isotropy in the crystallite size value was noticed for materials milled for 200 h and beyond, The column-length distribution function obtained from the size Fourier coefficients progressively narrowed down with the milling time.

Item Type:	Article
Additional Information:	International Conference on Fatigue and Fracture of Glasses, Ceramics and Composites Location: KOLKATA, INDIA Date: SEP, 1999 Sponsor(s): Mat Res Soc India
Uncontrolled Keywords:	X-ray diffraction; ball-milling; plastic deformation; microstrain
Subjects:	Microstructure and Characterization
Divisions:	Non-Oxide Ceramics & Composites
Depositing User:	Mrs Chandana Patra
Date Deposited:	09 Mar 2012 07:32
Last Modified:	09 Mar 2012 07:32
URI:	http://cgcri.csircentral.net/id/eprint/1191

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