Crack-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal Exposure

Crack-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal Exposure

Crack-growth behavior in yttria-stabilized zirconia-based thermal barrier coatings (TBCs) is investigated through a cyclic thermal fatigue (CTF) test to understand TBCs’ failure mechanisms. Initial cracks were introduced on the coatings’ top surface and cross section using the mi...

Full description

Bibliographic Details
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 2019-06-01
Series:Coatings
Subjects:
thermal barrier coating
cyclic thermal fatigue
crack growth
initial crack length
failure
Online Access:https://www.mdpi.com/2079-6412/9/6/365
id doaj-dc84d1df840b46a5babb79759a08f93b
record_format Article
spelling doaj-dc84d1df840b46a5babb79759a08f93b2020-11-24T21:20:19ZengMDPI AGCoatings2079-64122019-06-019636510.3390/coatings9060365coatings9060365Crack-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal ExposureDowon 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 Engineering, Indiana University–Purdue University Indianapolis, Indianapolis, IN 46202-5132, USACrack-growth behavior in yttria-stabilized zirconia-based thermal barrier coatings (TBCs) is investigated through a cyclic thermal fatigue (CTF) test to understand TBCs’ failure mechanisms. Initial cracks were introduced on the coatings’ top surface and cross section using the micro-indentation technique. The results show that crack length in the surface-cracked TBCs grew parabolically with the number of cycles in the CTF test. Failure in the surface-cracked TBC was dependent on the initial crack length formed with different loading levels, suggesting the existence of a threshold surface crack length. For the cross section, the horizontal crack length increased in a similar manner as observed in the surface. By contrast, in the vertical direction, the crack did not grow very much with CTF testing. An analytical model is proposed to explain the experimentally-observed crack-growth behavior.https://www.mdpi.com/2079-6412/9/6/365thermal barrier coatingcyclic thermal fatiguecrack growthinitial crack lengthfailure
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-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal Exposure
Coatings
thermal barrier coating
cyclic thermal fatigue
crack growth
initial crack length
failure
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-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal Exposure
title_short Crack-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal Exposure
title_full Crack-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal Exposure
title_fullStr Crack-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal Exposure
title_full_unstemmed Crack-Growth Behavior in Thermal Barrier Coatings with Cyclic Thermal Exposure
title_sort crack-growth behavior in thermal barrier coatings with cyclic thermal exposure
publisher MDPI AG
series Coatings
issn 2079-6412
publishDate 2019-06-01
description Crack-growth behavior in yttria-stabilized zirconia-based thermal barrier coatings (TBCs) is investigated through a cyclic thermal fatigue (CTF) test to understand TBCs’ failure mechanisms. Initial cracks were introduced on the coatings’ top surface and cross section using the micro-indentation technique. The results show that crack length in the surface-cracked TBCs grew parabolically with the number of cycles in the CTF test. Failure in the surface-cracked TBC was dependent on the initial crack length formed with different loading levels, suggesting the existence of a threshold surface crack length. For the cross section, the horizontal crack length increased in a similar manner as observed in the surface. By contrast, in the vertical direction, the crack did not grow very much with CTF testing. An analytical model is proposed to explain the experimentally-observed crack-growth behavior.
topic thermal barrier coating
cyclic thermal fatigue
crack growth
initial crack length
failure
url https://www.mdpi.com/2079-6412/9/6/365
work_keys_str_mv AT dowonsong crackgrowthbehaviorinthermalbarriercoatingswithcyclicthermalexposure
AT taeseupsong crackgrowthbehaviorinthermalbarriercoatingswithcyclicthermalexposure
AT ungyupaik crackgrowthbehaviorinthermalbarriercoatingswithcyclicthermalexposure
AT guanlinlyu crackgrowthbehaviorinthermalbarriercoatingswithcyclicthermalexposure
AT yeongiljung crackgrowthbehaviorinthermalbarriercoatingswithcyclicthermalexposure
AT baiggyuchoi crackgrowthbehaviorinthermalbarriercoatingswithcyclicthermalexposure
AT insookim crackgrowthbehaviorinthermalbarriercoatingswithcyclicthermalexposure
AT jingzhang crackgrowthbehaviorinthermalbarriercoatingswithcyclicthermalexposure
_version_ 1726002776111054848

Similar Items