Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings
Source abstract
Abstract
In this work, a novel thermal barrier coating (TBC) system is proposed that embeds silicon particles in coating as a crack-healing agent. The healing agent is encapsulated to avoid unintended reactions and premature oxidation. Thermal durability of the developed TBCs is evaluated through cyclic thermal fatigue and jet engine thermal shock tests. Moreover, artificial cracks are introduced into the buffer layer’s cross section using a microhardness indentation method. Then, the indented TBC specimens are subject to heat treatment to investigate their crack-resisting behavior in detail. The TBC specimens with the embedded healing agents exhibit a relatively better thermal fatigue resistance than the conventional TBCs. The encapsulated healing agent protects rapid large crack openings under thermal shock conditions. Different crack-resisting behaviors and mechanisms are proposed depending on the embedding healing agents.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Flame retardant materials and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Energy Engineering, Hanyang University, Seoul 133-791, Korea
School of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 641-773, Korea
High Temperature Materials Research Group, Korea Institute of Materials Science, 797 Changwondaero, Changwon, Gyeongnam 641-831, Korea
Department of Mechanical and Energy Engineering, Indiana University–Purdue University Indianapolis, Indianapolis, IN 46202-5132, USA
Funding
Korea Institute of Energy Technology Evaluation and Planning · Ministry of Trade, Industry and Energy
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