Rate of Peritectic Reaction in Iron-Carbon System Measured by Solid/Liquid Diffusion Couple Method.

Abstract

A model experiment was made for study on the effects of temperature on the reaction rate in isothermal peritectic reaction in iron-carbon system by using a solid/liquid diffusion couple method. Measurements of the variation in carbon concentration over 5, y, and liquid phases show a decrease in the carbon concen- tration from the y/liquid interface to the 5/y interface and an equilibrium partition of carbon at both the interfaces. The y-phase grows into both ~and liquid phases. A regression analysis of the thickness of the y-phase, x(,4m), with the reaction time, t(s), results in the following relations.