Fracture morphology and mechanism of a directionally solidified Al2O3/Y3Al5O12 eutectic single crystal. (1st July 2017)

• Record Type: Journal Article
• Authors: Wang, Xu; Zhong, Yujie; Wang, Dong; Xian, Quangang; Wang, Jingyang; Lou, Langhong; Zhang, Jian
• Is Part Of: Scripta materialia. Number 135(2017)
• Page Start: 46
• Page End: 49
• Publication Date: 2017-07-01
• Subjects: Al2O3/Y3Al5O12 single crystal -- Directional solidification -- Interface -- Fracture -- Toughness; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.03.027
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The strength and fracture behavior of a directionally solidified Al2 O3 /Y3 Al5 O12 eutectic single-crystal were investigated. To identify and classify the toughening mechanism, fractography of the single-crystal was thoroughly analyzed. It was observed that the interfaces between Al2 O3 and Y3 Al5 O12, which hindered the crack propagation, and nm-sized (111) cleavage planes appearing along the tearing ridge of Y3 Al5 O12 markedly improved the Al2 O3 /Y3 Al5 O12 eutectic single-crystal toughness. These results could improve understanding of the microstructure design and deformation mechanism of the Al2 O3 /Y3 Al5 O12 eutectic crystal. Graphical abstract: