Journal Published Online: 23 September 2010
Volume 39, Issue 2

Pore Independent Crack Propagation of Glass-Alumina Functionally Graded Materials

CODEN: JTEVAB

Abstract

Crack propagation of glass-alumina functionally graded materials prepared by a novel freeform fabrication method was investigated. Pores were intentionally introduced by partial decomposition of poly vinyl alcohol gel. Preferential distribution of pores adjacent the alumina particles is confirmed due to the integrated liquid-phase sintering process, especially the migration of the activated alumina interfaces towards the equilibrium state. Crack propagation and distribution were directly observed by scanning electron microscopy. Cracks propagate through the weakly bonded interfaces which finally cause the glass matrix to fracture. However, pores have little effect on the crack propagation.

Author Information

Cheng-Long, Yu
Research Laboratory of Hydrothermal Chemistry, Faculty of Science, Kochi Univ., Kochi, Japan
Hong-Tao, Jiang
School of Materials Science and Engineering, Shaanxi Univ. of Science and Technology, Xi’an, People’s Republic of China
Li-Li, Wang
School of Materials Science and Engineering, Shaanxi Univ. of Science and Technology, Xi’an, People’s Republic of China
Pages: 6
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Stock #: JTE103037
ISSN: 0090-3973
DOI: 10.1520/JTE103037