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Mechanism of YSZ diffusion barrier on restraining interdiffusion of Ni and Ti in NiCrAlY/TiAl alloy.

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Title: Mechanism of YSZ diffusion barrier on restraining interdiffusion of Ni and Ti in NiCrAlY/TiAl alloy.
Authors: Hua, Chen1,2,3 (AUTHOR), Huang, Taihong1,2,3 (AUTHOR), Man, Yantong1,2,3 (AUTHOR), Zhou, Rongfeng1,3 (AUTHOR), He, Xuan1,2,3 (AUTHOR), Yin, Guanwen1,2,3 (AUTHOR), Wang, Peng4 (AUTHOR), Song, Peng1,2,3,4 (AUTHOR) songpeng@kust.edu.cn
Source: Ceramics International. Apr2026:Part B, Vol. 52 Issue 9, p12708-12725. 18p.
Subjects: Yttria stabilized zirconium oxide, Diffusion control, Oxidation, Thermal barrier coatings, Titanium aluminides, Titanium nitride, Plasma spraying
Abstract: The YSZ diffusion barrier was prepared between Ti43.5Al4Nb1Mo0.1B substrate and NiCrAlY by atmospheric plasma spraying to inhibit the strong interdiffusion between the substrate and the coating. After high-temperature cyclic oxidation test at 1173 K, the results show that single NiCrAlY coating, Ti and Ni diffused seriously, which accelerated the degradation of NiCrAlY coating. However, in the duplex NiCrAlY/YSZ coating, the difference in oxygen chemical potential between the NiCrAlY and TiAl leads to the formation of an asymmetric galvanic cell in the NiCrAlY/YSZ/TiAl system at high temperatures, causing YSZ to decompose and Zr to react with Ni to form the Ni 7 Zr 2 phase. After 504 h, a relatively complete Ni 7 Zr 2 layer was formed on the surface of YSZ. In addition, the N 2 retained in the YSZ coating pores reacted with Ti at the YSZ/substrate interface to form a thin and discontinuous TiN, which to some extent inhibited the outward diffusion of Ti. Vickers hardness results also prove that the single NiCrAlY coating structural failure and effectiveness of YSZ diffusion barrier. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Mechanism of YSZ diffusion barrier on restraining interdiffusion of Ni and Ti in NiCrAlY/TiAl alloy.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Hua%2C+Chen%22">Hua, Chen</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Taihong%22">Huang, Taihong</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Man%2C+Yantong%22">Man, Yantong</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Rongfeng%22">Zhou, Rongfeng</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Xuan%22">He, Xuan</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yin%2C+Guanwen%22">Yin, Guanwen</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Peng%22">Wang, Peng</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Peng%22">Song, Peng</searchLink><relatesTo>1,2,3,4</relatesTo> (AUTHOR)<i> songpeng@kust.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Apr2026:Part B, Vol. 52 Issue 9, p12708-12725. 18p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Yttria+stabilized+zirconium+oxide%22">Yttria stabilized zirconium oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion+control%22">Diffusion control</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+barrier+coatings%22">Thermal barrier coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+aluminides%22">Titanium aluminides</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+nitride%22">Titanium nitride</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+spraying%22">Plasma spraying</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The YSZ diffusion barrier was prepared between Ti43.5Al4Nb1Mo0.1B substrate and NiCrAlY by atmospheric plasma spraying to inhibit the strong interdiffusion between the substrate and the coating. After high-temperature cyclic oxidation test at 1173 K, the results show that single NiCrAlY coating, Ti and Ni diffused seriously, which accelerated the degradation of NiCrAlY coating. However, in the duplex NiCrAlY/YSZ coating, the difference in oxygen chemical potential between the NiCrAlY and TiAl leads to the formation of an asymmetric galvanic cell in the NiCrAlY/YSZ/TiAl system at high temperatures, causing YSZ to decompose and Zr to react with Ni to form the Ni 7 Zr 2 phase. After 504 h, a relatively complete Ni 7 Zr 2 layer was formed on the surface of YSZ. In addition, the N 2 retained in the YSZ coating pores reacted with Ti at the YSZ/substrate interface to form a thin and discontinuous TiN, which to some extent inhibited the outward diffusion of Ti. Vickers hardness results also prove that the single NiCrAlY coating structural failure and effectiveness of YSZ diffusion barrier. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.ceramint.2026.01.414
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        Text: English
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      – SubjectFull: Diffusion control
        Type: general
      – SubjectFull: Oxidation
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      – SubjectFull: Thermal barrier coatings
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      – SubjectFull: Titanium aluminides
        Type: general
      – SubjectFull: Titanium nitride
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      – SubjectFull: Plasma spraying
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      – TitleFull: Mechanism of YSZ diffusion barrier on restraining interdiffusion of Ni and Ti in NiCrAlY/TiAl alloy.
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            NameFull: Hua, Chen
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              M: 04
              Text: Apr2026:Part B
              Type: published
              Y: 2026
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