Temperature Gradient Field Theory of Nucleation

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Abstract

According to the proposed theory, ceramic particles present in molten metal, lose heat at a slower rate than the metallic liquid during cooling. Such condition results in the formation of a spherical thermal gradient field (TGF) around each particle. Hence, the interstitials (low temperature) of such TGFs are the regions to reach the nucleation temperature first, owing to low energy barrier than the liquid-particle interface (higher temperature). Analytics also indicate that the nucleation rate is higher at the TGF interstitials, than at the liquid-particle interface. Such TGF network results in simultaneous nucleation throughout the system, resulting in grain refinement.

Item Type:	Conference or Workshop Item (Lecture)
Additional Information:	Article number 012099
Uncontrolled Keywords:	Grain Refinement; Solidification; Nucleation; Wetting; Heat-transfer
Subjects:	T Technology > TS Manufactures
Faculty/Division:	Faculty of Manufacturing Engineering
Depositing User:	Mrs. Neng Sury Sulaiman
Date Deposited:	28 Jul 2016 03:20
Last Modified:	23 Jan 2018 01:25
URI:	http://umpir.ump.edu.my/id/eprint/8255
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