Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings

Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings

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 ther...

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Main Authors: Dowon Song, Taeseup Song, Ungyu Paik, Guanlin Lyu, Yeon-Gil Jung, Baig-Gyu Choi, In-Soo Kim, Jing Zhang
Format: Article
Language:English
Published: MDPI AG 2019-05-01
Series:Coatings
Subjects:
crack healing
encapsulation
healing agent
thermal barrier coating
thermal durability
Online Access:https://www.mdpi.com/2079-6412/9/6/358
id doaj-89ddb0cec7ab4cd79ff0bc8ff6ae2ab7
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spelling doaj-89ddb0cec7ab4cd79ff0bc8ff6ae2ab72020-11-25T01:51:15ZengMDPI AGCoatings2079-64122019-05-019635810.3390/coatings9060358coatings9060358Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier CoatingsDowon Song0Taeseup Song1Ungyu Paik2Guanlin Lyu3Yeon-Gil Jung4Baig-Gyu Choi5In-Soo Kim6Jing Zhang7Department of Energy Engineering, Hanyang University, Seoul 133-791, KoreaDepartment of Energy Engineering, Hanyang University, Seoul 133-791, KoreaDepartment of Energy Engineering, Hanyang University, Seoul 133-791, KoreaSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 641-773, KoreaSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 641-773, KoreaHigh Temperature Materials Research Group, Korea Institute of Materials Science, 797 Changwondaero, Changwon, Gyeongnam 641-831, KoreaHigh Temperature Materials Research Group, Korea Institute of Materials Science, 797 Changwondaero, Changwon, Gyeongnam 641-831, KoreaDepartment of Mechanical and Energy Engineering, Indiana University–Purdue University Indianapolis, Indianapolis, IN 46202-5132, USAIn 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.https://www.mdpi.com/2079-6412/9/6/358crack healingencapsulationhealing agentthermal barrier coatingthermal durability
collection DOAJ
language English
format Article
sources DOAJ
author Dowon Song
Taeseup Song
Ungyu Paik
Guanlin Lyu
Yeon-Gil Jung
Baig-Gyu Choi
In-Soo Kim
Jing Zhang
spellingShingle Dowon Song
Taeseup Song
Ungyu Paik
Guanlin Lyu
Yeon-Gil Jung
Baig-Gyu Choi
In-Soo Kim
Jing Zhang
Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings
Coatings
crack healing
encapsulation
healing agent
thermal barrier coating
thermal durability
author_facet Dowon Song
Taeseup Song
Ungyu Paik
Guanlin Lyu
Yeon-Gil Jung
Baig-Gyu Choi
In-Soo Kim
Jing Zhang
author_sort Dowon Song
title Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings
title_short Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings
title_full Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings
title_fullStr Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings
title_full_unstemmed Crack-Resistance Behavior of an Encapsulated, Healing Agent Embedded Buffer Layer on Self-Healing Thermal Barrier Coatings
title_sort crack-resistance behavior of an encapsulated, healing agent embedded buffer layer on self-healing thermal barrier coatings
publisher MDPI AG
series Coatings
issn 2079-6412
publishDate 2019-05-01
description 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.
topic crack healing
encapsulation
healing agent
thermal barrier coating
thermal durability
url https://www.mdpi.com/2079-6412/9/6/358
work_keys_str_mv AT dowonsong crackresistancebehaviorofanencapsulatedhealingagentembeddedbufferlayeronselfhealingthermalbarriercoatings
AT taeseupsong crackresistancebehaviorofanencapsulatedhealingagentembeddedbufferlayeronselfhealingthermalbarriercoatings
AT ungyupaik crackresistancebehaviorofanencapsulatedhealingagentembeddedbufferlayeronselfhealingthermalbarriercoatings
AT guanlinlyu crackresistancebehaviorofanencapsulatedhealingagentembeddedbufferlayeronselfhealingthermalbarriercoatings
AT yeongiljung crackresistancebehaviorofanencapsulatedhealingagentembeddedbufferlayeronselfhealingthermalbarriercoatings
AT baiggyuchoi crackresistancebehaviorofanencapsulatedhealingagentembeddedbufferlayeronselfhealingthermalbarriercoatings
AT insookim crackresistancebehaviorofanencapsulatedhealingagentembeddedbufferlayeronselfhealingthermalbarriercoatings
AT jingzhang crackresistancebehaviorofanencapsulatedhealingagentembeddedbufferlayeronselfhealingthermalbarriercoatings
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