The effect of emergent dislocations on the kinetics of decomposition of solid surfaces under conditions of chemical reaction control

Hayes, P. C. (1984) The effect of emergent dislocations on the kinetics of decomposition of solid surfaces under conditions of chemical reaction control. Metallurgical Transactions B, 15 3: 519-524. doi:10.1007/BF02657391


Author Hayes, P. C.
Title The effect of emergent dislocations on the kinetics of decomposition of solid surfaces under conditions of chemical reaction control
Journal name Metallurgical Transactions B
ISSN 0360-2141
1543-1916
Publication date 1984
Sub-type Article (original research)
DOI 10.1007/BF02657391
Open Access Status Not Open Access
Volume 15
Issue 3
Start page 519
End page 524
Total pages 6
Place of publication New York, NY, United States
Publisher Springer
Abstract Using a simplified model of an oxide surface containing emergent dislocations, it has been shown that the overall chemical reaction rate constant for the reduction of an iron oxide reaction surface varies during the initial period of oxygen removal due to the increase in the number of reaction sites. The removal of any effective barrier to ledge formation ensures that the maximum number of reaction sites eventually becomes active, i.e., the maximum chemical reaction rate constant is achieved. The transient time or time to achieve the maximum rate constant has been shown to depend on the ledge velocity, which is directly related to the chemical reaction rate per reaction site, and the number of dislocation sources per unit area on the surface. The form of the transient and the transient time are estimated using a simple nucleation and growth model.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Wed, 13 Jan 2016, 16:01:23 EST by Vicki Thompson on behalf of School of Chemical Engineering