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Published on: May 1, 2018
Reactive Infiltration: Effects of Different Parameters
M Karla López-González1, Leidy Figueroa-Quintero1, David Villalgordo-Hernández1
1Laboratory of Advanced Materials, Inorganic Chemistry Department, University Materials Institute of Alicante, University of Alicante, 03080 Alicante, Spain.
Reactive infiltration, a key method for producing silicon carbide (SiC) parts, is primarily driven by chemical reactions, not fluid dynamics. This finding clarifies the fundamental mechanisms governing this versatile and cost-effective manufacturing process.
Area of Science:
- Materials Science
- Chemical Engineering
- Ceramics Processing
Background:
- Reactive infiltration is a widely adopted, cost-effective method for producing complex silicon carbide (SiC) and SiC/SiC components.
- Compared to technologies like Hot Isostatic Pressing (HIP), reactive infiltration offers significant advantages in versatility and economics.
- Debate persists regarding the underlying mechanisms controlling the infiltration process.
Purpose of the Study:
- To investigate and provide definitive evidence on whether reactive infiltration is governed by physical flow dynamics or chemical reactions.
- To resolve the ongoing scientific debate concerning the primary driving forces in reactive infiltration.
Main Methods:
- Analysis of the reactive infiltration process for complex SiC and SiC/SiC parts.
- Experimental investigation focusing on the role of reactions at the triple line (contact line between solid, liquid, and gas phases).
Main Results:
- Consistent and strong evidence indicates that chemical reactions are the dominant factor controlling reactive infiltration.
- The study refutes the hypothesis that fluid dynamics alone dictate the infiltration behavior.
Conclusions:
- Reactive infiltration is primarily a chemically controlled process.
- Understanding the chemical reaction mechanisms is crucial for optimizing SiC and SiC/SiC part production.
- This research clarifies fundamental aspects of reactive infiltration, impacting future manufacturing strategies.
