Mechanism of interface morphology of YSZ thermal barrier coating on growth behavior of TGO layer
The mechanism of coating interface bulge on the TGO growth behavior was studied by analyzing the rule of TGO growth and the interface stress at the top coat/bond coat interface. The results show that the growth rate of TGO in the convex region of the top coat/bond coat interface is higher than that...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Aeronautical Materials
2019-10-01
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| Series: | Journal of Aeronautical Materials |
| Subjects: | |
| Online Access: | http://jam.biam.ac.cn/CN/Y2019/V39/I5/113 |
| _version_ | 1818254581284470784 |
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| author | TANG Jianjiang YU Fangli ZHANG Haihong BAI Yu WANG Junwen LIU Yanling |
| author_facet | TANG Jianjiang YU Fangli ZHANG Haihong BAI Yu WANG Junwen LIU Yanling |
| author_sort | TANG Jianjiang |
| collection | DOAJ |
| description | The mechanism of coating interface bulge on the TGO growth behavior was studied by analyzing the rule of TGO growth and the interface stress at the top coat/bond coat interface. The results show that the growth rate of TGO in the convex region of the top coat/bond coat interface is higher than that in the other regions. According to the stress analysis of ANSYS, the interface stress increases (from 185 MPa to 406 MPa) with the increase of roughness (from 10 μm to 20 μm). Additionally, the interfacial stress also increases (from 142 MPa to 574 MPa) with the thickness of TGO layer increasing (from 1.6 μm to 9.3 μm). What’s more, during high temperature oxidation, the convex region of the top coat/bond coat interface is mainly characterized by tensile stress and the depressed region is compressive stress.The tensile stress can promote the rapid growth of TGO layer, while the compressive stress exhibits the inhibition on the growth rate of TGO. In summary, reducing the roughness of bond coat can reduce the interface stress and slow the growth rate of TGO, which ensures the effective bonding strength of the coating. Thus, the stability of the TBCs at high temperature can be improved. |
| first_indexed | 2024-12-12T16:58:14Z |
| format | Article |
| id | doaj.art-d76eeb712c8b4a38b2a0fadb8b9552a7 |
| institution | Directory Open Access Journal |
| issn | 1005-5053 1005-5053 |
| language | zho |
| last_indexed | 2024-12-12T16:58:14Z |
| publishDate | 2019-10-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj.art-d76eeb712c8b4a38b2a0fadb8b9552a72022-12-22T00:18:12ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50531005-50532019-10-0139511311910.11868/j.issn.1005-5053.2019.000081201905000081Mechanism of interface morphology of YSZ thermal barrier coating on growth behavior of TGO layerTANG Jianjiang0YU Fangli1ZHANG Haihong2BAI Yu3WANG Junwen4LIU Yanling5School of Materials Engineering, Xi’an Aeronautical University, Xi’an 710077, ChinaSchool of Materials Engineering, Xi’an Aeronautical University, Xi’an 710077, ChinaSchool of Materials Engineering, Xi’an Aeronautical University, Xi’an 710077, ChinaState Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, ChinaWuzhong Instrument Co.， Ltd.，Wuzhong 751100, Ningxia, ChinaThe mechanism of coating interface bulge on the TGO growth behavior was studied by analyzing the rule of TGO growth and the interface stress at the top coat/bond coat interface. The results show that the growth rate of TGO in the convex region of the top coat/bond coat interface is higher than that in the other regions. According to the stress analysis of ANSYS, the interface stress increases (from 185 MPa to 406 MPa) with the increase of roughness (from 10 μm to 20 μm). Additionally, the interfacial stress also increases (from 142 MPa to 574 MPa) with the thickness of TGO layer increasing (from 1.6 μm to 9.3 μm). What’s more, during high temperature oxidation, the convex region of the top coat/bond coat interface is mainly characterized by tensile stress and the depressed region is compressive stress.The tensile stress can promote the rapid growth of TGO layer, while the compressive stress exhibits the inhibition on the growth rate of TGO. In summary, reducing the roughness of bond coat can reduce the interface stress and slow the growth rate of TGO, which ensures the effective bonding strength of the coating. Thus, the stability of the TBCs at high temperature can be improved.http://jam.biam.ac.cn/CN/Y2019/V39/I5/113thermal barrier coatingsinterface morphologyinterfacial stresstgo growth behavior |
| spellingShingle | TANG Jianjiang YU Fangli ZHANG Haihong BAI Yu WANG Junwen LIU Yanling Mechanism of interface morphology of YSZ thermal barrier coating on growth behavior of TGO layer Journal of Aeronautical Materials thermal barrier coatings interface morphology interfacial stress tgo growth behavior |
| title | Mechanism of interface morphology of YSZ thermal barrier coating on growth behavior of TGO layer |
| title_full | Mechanism of interface morphology of YSZ thermal barrier coating on growth behavior of TGO layer |
| title_fullStr | Mechanism of interface morphology of YSZ thermal barrier coating on growth behavior of TGO layer |
| title_full_unstemmed | Mechanism of interface morphology of YSZ thermal barrier coating on growth behavior of TGO layer |
| title_short | Mechanism of interface morphology of YSZ thermal barrier coating on growth behavior of TGO layer |
| title_sort | mechanism of interface morphology of ysz thermal barrier coating on growth behavior of tgo layer |
| topic | thermal barrier coatings interface morphology interfacial stress tgo growth behavior |
| url | http://jam.biam.ac.cn/CN/Y2019/V39/I5/113 |
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