Subcritical crack growth phenomenon and fractography of barium titanate and barium titanate-based composite
- Osaka Univ., Ibaraki, Osaka (Japan). Inst. of Scientific and Industrial Research
Subcritical crack growth (SCG), the propagation of surface and subsurface flaws under subcritical stress, i.e., any stress less than that necessary to catastrophically propagate the flaw, is a general phenomenon frequently observed in ceramics. Recently, electrical devices are miniaturized and used under quite severe atmospheres. Such environments often lead to the initiation and propagation of cracks due to the repeated electrical cycling, stresses by the mismatch in thermal expansion coefficient between devices and other constituents and thermal shock. In this study, the authors fabricated BaTiO{sub 3} and BaTiO{sub 3}-based composites containing nano-sized SiC particulates. The SCG phenomenon and fractography were discussed based on the data obtained from indentation-induced-fracture (IIF) method.
- OSTI ID:
- 417900
- Journal Information:
- Scripta Materialia, Vol. 36, Issue 2; Other Information: PBD: 15 Jan 1997
- Country of Publication:
- United States
- Language:
- English
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