Please consider attending this seminar:
MATERIALS ENGINEERING
“Kinetics of Liquid-Solid Displacement Reactions”
By
Glenn Peterson
Purdue MSE Preliminary Exam
Advisors: Professor Michael Sangid and Professor Kenneth Sandhage
ABSTRACT
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Defense, aerospace, and nuclear applications rely heavily on materials able to withstand extreme environments. Of potential solutions, ceramic-metal (cermet) composites can address several fundamental concerns such as temperature, mechanical behavior, and oxidation/corrosion
resistance. Forming refractory metal/ultra-high temperature ceramic composites is not intuitive. A novel method of processing these materials is through reactive melt infiltration. In general terms, this is a process where a liquid fills a porous perform,
and a displacement reaction occurs. A thermodynamic analysis is presented, and several models for reaction rate are developed for evaluating various controls of solid-liquid displacement reactions. Two common rate limiting steps are chemical reaction or diffusion
controlled. Knowledge of reaction constants—necessary data points—must be experimentally determined and can be subsequently used to derive activation energies. These activation energies are one of the tools used to identify the rate limiting step for a given
reaction. Fundamentally, determining the reaction rate for a system enables the capability to scale up a process and make usable engineering components.
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Date: Friday, November 5, 2021
Time: 11:00 AM
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Join from the meeting link |
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https://purdue.webex.com/meet/sandhage?_ga=2.42913062.268434666.1632831811-62041572.1612894399 |
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