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Microstructure, Eutectic Mechanism, and Properties of Al2O3/YAG Eutectic Ceramics Prepared Through Focused Nanosecond Pulsed Laser-Induced Nucleation.

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Title: Microstructure, Eutectic Mechanism, and Properties of Al2O3/YAG Eutectic Ceramics Prepared Through Focused Nanosecond Pulsed Laser-Induced Nucleation.
Authors: Lu, Yuhang1,2 (AUTHOR), Zhong, Qiu2 (AUTHOR), Yang, Liping2,3 (AUTHOR) lpyang@mail.sic.ac.cn, Li, Huidong2 (AUTHOR), Tao, Ye2 (AUTHOR), Cao, Chengcheng2 (AUTHOR), Chen, Zezhong1 (AUTHOR) zzhchen@usst.edu.cn
Source: JOM: The Journal of The Minerals, Metals & Materials Society (TMS). Jul2026, Vol. 78 Issue 7, p6334-6343. 10p.
Subjects: Eutectic structure, Mechanical behavior of materials, Yttrium aluminum garnet, Fracture mechanics, Microstructure, Melting points, Crystal growth
Abstract: This study employed focused nanosecond pulsed laser-induced nucleation to regulate nucleation and solidification at varying undercooling temperatures, creating coupled growth regions with distinct energy differences at grain boundaries. These differences promote phase separation and, under pulsed laser irradiation, lead to the accumulation of defects such as Frenkel defects and oxygen vacancies at the phase interface. This accelerates material transfer and interface migration, enhancing coupled zone growth and causing YAG and Al2O3 grain coarsening, which significantly alters the microstructure. At 1300°C, the Al2O3/YAG Eutectic Ceramic Sample 1 (AYec-01), induced by pulsed laser nucleation, showed a 10% increase in toughness compared to the Al2O3/YAG Eutectic Ceramic Sample 2 (AYec-02), induced by non-pulsed laser. Additionally, the mechanical property differences between samples treated at 1300°C and 1600°C underline the pivotal role of undercooling temperature in nucleation efficiency. The Al2O3/YAG Eutectic Ceramic Sample 1, with its fine eutectic coupled structure and crack toughening mechanism, exhibited the highest toughness. Focused nanosecond pulsed laser-induced nucleation effectively enhanced the mechanical properties of Al2O3/YAG eutectic ceramics, demonstrating strong potential for engineering applications. [ABSTRACT FROM AUTHOR]
Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature 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.)
Database: Engineering Source
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  Data: <searchLink fieldCode="DE" term="%22Eutectic+structure%22">Eutectic structure</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Yttrium+aluminum+garnet%22">Yttrium aluminum garnet</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+mechanics%22">Fracture mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Melting+points%22">Melting points</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+growth%22">Crystal growth</searchLink>
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  Data: This study employed focused nanosecond pulsed laser-induced nucleation to regulate nucleation and solidification at varying undercooling temperatures, creating coupled growth regions with distinct energy differences at grain boundaries. These differences promote phase separation and, under pulsed laser irradiation, lead to the accumulation of defects such as Frenkel defects and oxygen vacancies at the phase interface. This accelerates material transfer and interface migration, enhancing coupled zone growth and causing YAG and Al2O3 grain coarsening, which significantly alters the microstructure. At 1300°C, the Al2O3/YAG Eutectic Ceramic Sample 1 (AYec-01), induced by pulsed laser nucleation, showed a 10% increase in toughness compared to the Al2O3/YAG Eutectic Ceramic Sample 2 (AYec-02), induced by non-pulsed laser. Additionally, the mechanical property differences between samples treated at 1300°C and 1600°C underline the pivotal role of undercooling temperature in nucleation efficiency. The Al2O3/YAG Eutectic Ceramic Sample 1, with its fine eutectic coupled structure and crack toughening mechanism, exhibited the highest toughness. Focused nanosecond pulsed laser-induced nucleation effectively enhanced the mechanical properties of Al2O3/YAG eutectic ceramics, demonstrating strong potential for engineering applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature 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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        Value: 10.1007/s11837-025-07917-8
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        Text: English
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      – SubjectFull: Eutectic structure
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Yttrium aluminum garnet
        Type: general
      – SubjectFull: Fracture mechanics
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      – SubjectFull: Microstructure
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      – SubjectFull: Melting points
        Type: general
      – SubjectFull: Crystal growth
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      – TitleFull: Microstructure, Eutectic Mechanism, and Properties of Al2O3/YAG Eutectic Ceramics Prepared Through Focused Nanosecond Pulsed Laser-Induced Nucleation.
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              M: 07
              Text: Jul2026
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              Y: 2026
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