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| Stress corrosion cracking of a BaTiO{3} ferroelectric ceramics |
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| 北京科技大学 |
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Cite this article:
. Stress corrosion cracking of a BaTiO{3} ferroelectric ceramics. Chin J Mater Res, 2004, 18(4): 424-428.
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Abstract Stress corrosion cracking (SCC) or static fatigue fracture of a BaTiO$_{3}$
ferroelectric ceramics in moist atmosphere, water, silicon oil and formamide was
investigated at constant load test using a single--edge notched tensile specimen.
The result showed that SCC could occur in these four environments. The fracture
surface overloaded in air is transgranular brittle fracture, and the fracture
surfaces of SCC in moist atmosphere, water, silicon oil and formamide are mainly
transgranular but there is a small intergranular region. The normalized threshold
stress intensity factor of SCC was 0.78(in air), 0.63(in water), 0.66(in silicon oil)
and 0.82 (in formamide), respectively, and the fracture toughness is
1.29$\pm$0.14 MPa$\cdot$m$^{1/2}$.
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Received: 01 September 2004
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