Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14231
Title: Modeling of diffusion in mechanical alloying
Authors: YANG CHENG
Keywords: Mechanical alloying (MA); Ball milling; Grain boundary diffusion; Diffusion; Modeling of diffusion; XRD
Issue Date: 27-Jul-2004
Source: YANG CHENG (2004-07-27). Modeling of diffusion in mechanical alloying. ScholarBank@NUS Repository.
Abstract: Mechanical Alloying (MA) is a ball milling process where a powder mixture placed in a ball mill is subjected to high-energy collision from the balls. The process leads to repetitive plastic deformation, fracturing and cold welding of the powders.Diffusion is a fundamental process during mechanical alloying. In this thesis, a mathematical model, taking into consideration the critical factors which influence the diffusion process during MA, has been developed to predict the kinetics of diffusive intermixing in a binary miscible system during MA.Comparison between the kinetics predicted by the present model with the relevant experimental data from Ni-Al shows that changes in composition and completion time of diffusion are in good agreement.
URI: http://scholarbank.nus.edu.sg/handle/10635/14231
Appears in Collections:Master's Theses (Open)

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