Microstructure evolution of Al 2 O 3 /Y 3 Al 5 O 12 eutectic crystal during directional solidification

Wang, Xu; Wang, Jingyang; Sun, Luchao; Zhang, Hui; Wang, Li; Lou, Langhong; Zhang, Jian

doi:10.1016/j.scriptamat.2015.05.038

Cited by 38 publications

(10 citation statements)

References 29 publications

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“…16,17 Obviously, a competition between interfacial energy and the seed constraint is expected. It is worth mentioning that the COR-II is consistent with the confirmed preferred crystallography relationship of the directionally solidified Al 2 O 3 /YAG eutectic ceramic in Reference.…”

Section: Discussionmentioning

confidence: 99%

“…It is worth mentioning that the COR-II is consistent with the confirmed preferred crystallography relationship of the directionally solidified Al 2 O 3 /YAG eutectic ceramic in Reference. 16,17 Obviously, a competition between interfacial energy and the seed constraint is expected.…”

Section: Discussionmentioning

confidence: 99%

“…16 The crystal orientation was investigated by means of EBSD (NordlysNano, Oxfordshire, UK). The DS process was started with a 10 mm/h withdraw rate after soaking the liquid ceramic zone for 1 minute to ensure that the c-sapphire was melted about~1 mm.…”

Section: Methodsmentioning

confidence: 99%

“…Details of the precursor's preparation can be found in our previous study. 16 The crystal orientation was investigated by means of EBSD (NordlysNano, Oxfordshire, UK). A 300 kV transmission electron microscopy (TEM, FEI Tecnai G2 F30, Oregon, USA) was used for structural investigation of the interfaces and the HRTEM observation.…”

Section: Methodsmentioning

confidence: 99%

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Effect of interfacial energy on microstructure of a directionally solidified Al₂O₃/YAG eutectic ceramic

Zhong

Wang

et al. 2017

J Am Ceram Soc

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An Al2O3/Y3Al5O12 eutectic ceramic was prepared with a c‐axis sapphire seed by an optical floating zone furnace. The crystallographic relationships in the initial and the steady growth sections of the as‐grown eutectic ceramic were investigated by electron backscattering diffraction and transmission electron microscopy. The corresponding results were: <111 > {101}Y3Al5O12 || <0001 > {112¯0}Al2O3 and <110 > {21¯1}Y3Al5O12 || <11¯00 > {0001}Al2O3, respectively. The steady orientation of the latter one shows smaller planar disregistry. Interfacial strain played the decisive role in affecting the solidification behavior of the Al2O3/Y3Al5O12 eutectic ceramic. The stability of interfaces with minimum interfacial strain and better ionic charge balance in irregular microstructure prevail upon the constraint of the seed. These results might cast light for the interfacial design of the Al2O3/Y3Al5O12 binary eutectic ceramic.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Effect of interfacial energy on microstructure of a directionally solidified Al₂O₃/YAG eutectic ceramic

Zhong

Wang

et al. 2017

J Am Ceram Soc

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“…For example, the preferred growth directions each component (Al 2 O 3 , the YAG and ZrO 2 ) are different from that in the Al 2 O 3 /YAG binary eutectic or in the Al 2 O 3 /YAG/ZrO 2 ternary eutectic . In addition, the preferred growth directions of the Al 2 O 3 /ZrO 2 and Al 2 O 3 /YAG eutectic are different from that of those in the Al 2 O 3 /YAG/ZrO 2 ternary eutectic, as summarized in Table (including the results of the present work). It can be concluded that the preferred crystallography orientation of the Al 2 O 3 /YAG/ZrO 2 ternary eutectic was determined by not only the solid/liquid surface energy but also the interfacial energy.…”

Section: Discussionmentioning

confidence: 99%

Competitive growth of Al₂O₃/YAG/ZrO₂ eutectic ceramics during directional solidification: Effect of interfacial energy

et al. 2018

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The microstructure evolution and growth behavior of the Al2O3/Y3Al5O12(YAG)/ZrO2 ternary eutectic ceramics during directional solidification were well investigated. During directional solidification of the Al2O3/YAG/ZrO2 ternary eutectic ceramics, {112¯0} Al2O3 paralleled with {001}ZrO2 while they did not parallel with {001}YAG at the same time in the competitive growth stage. All of the interfaces parallel to each other finally. The area percentage of the Al2O3/ZrO2 and YAG/ZrO2 interfaces are 40.4 ± 0.2% and 30.8 ± 0.1%, respectively, higher than that of the Al2O3/YAG (28.8 ± 0.2%). The content of Al2O3 and YAG phases are 39.9% and 41.1%, respectively, almost double of that of ZrO2. The interfaces of Al2O3/ZrO2 and YAG/ZrO2 are shorter and more dispersed than that of the Al2O3/YAG. It was found that the interfacial energy of Al2O3/ZrO2 and YAG/ZrO2 interfaces are lower than that of Al2O3/YAG. It can be concluded that interfacial energy plays a decisive role in affecting the crystallographic orientation and interfaces distribution in the Al2O3/YAG/ZrO2 eutectic since the interfaces of Al2O3/ZrO2 and YAG/ZrO2 with lower interfacial energy can be formed more easily during directional solidification. Therefore, the contents of Al2O3/ZrO2 and YAG/ZrO2 interfaces are higher. This study can provide theoretical guidance for interface design of multi‐phase materials.

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Additive manufacturing of ceramics and cermets: present status and future perspectives

Saha

Mallik

2021

Sādhanā

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At present, fabrication of ceramics using AM-based techniques mainly suffers from two primary limitations, viz: (i) low density and (ii) poor mechanical properties of the finished components. It is worth mentioning that the present state of research in the avenue of AMbased ceramics is focussed mainly on fabricating ceramic and cermet components with enhanced densities and improved mechanical properties. However, to the best of the authors' knowledge, not much is known about the microstructure evolution and its correlation with the mechanical properties of the finished parts. Addressing the aforementioned avenue is highly essential for understanding the utilisation of these components for structural applications. To this end, the present review article is aimed to address the future perspectives in this avenue has been provided with a special emphasis on the need to establish a systematic structureproperty correlation in these materials.

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Microstructure evolution of Al 2 O 3 /Y 3 Al 5 O 12 eutectic crystal during directional solidification

Cited by 38 publications

References 29 publications

Effect of interfacial energy on microstructure of a directionally solidified Al₂O₃/YAG eutectic ceramic

Effect of interfacial energy on microstructure of a directionally solidified Al₂O₃/YAG eutectic ceramic

Competitive growth of Al₂O₃/YAG/ZrO₂ eutectic ceramics during directional solidification: Effect of interfacial energy

Additive manufacturing of ceramics and cermets: present status and future perspectives

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Microstructure evolution of Al 2 O 3 /Y 3 Al 5 O 12 eutectic crystal during directional solidification

Cited by 38 publications

References 29 publications

Effect of interfacial energy on microstructure of a directionally solidified Al2O3/YAG eutectic ceramic

Effect of interfacial energy on microstructure of a directionally solidified Al2O3/YAG eutectic ceramic

Competitive growth of Al2O3/YAG/ZrO2 eutectic ceramics during directional solidification: Effect of interfacial energy

Additive manufacturing of ceramics and cermets: present status and future perspectives

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Effect of interfacial energy on microstructure of a directionally solidified Al₂O₃/YAG eutectic ceramic

Effect of interfacial energy on microstructure of a directionally solidified Al₂O₃/YAG eutectic ceramic

Competitive growth of Al₂O₃/YAG/ZrO₂ eutectic ceramics during directional solidification: Effect of interfacial energy