Flexural strength of zirconia/stainless steel functionally graded materials |
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| Authors: | Jun Li Kang Zhao Yu-fei Tang and Da-yu Li |
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| Affiliation: | (1) Dynamic Photmechanics Laboratory, Department of Mechanical Engineering and Applied Mechanics, University of Rhode Island, Kingston, RI, 02881, U.S.A;(2) Department of Mechanical Engineering, Indian Institute of Technology, Kanpur, India |
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| Abstract: | Zirconia/stainless steel (ZrO2/SUS316L) functionally graded materials (FGMs) were fabricated by tape casting and laminating. Microstructures of FGMs were
observed by optical microscope. Fracture behavior of FGMs in different loading modes and influences of different gradient
changes on flexural strength were investigated. The results show that ZrO2/ SUS316L FGMs with graded components at interlayers are obtained after they are sintered in vacuum and pressureless condition
at 1 350 °C. The I–II mixed mode crack creates in composite layer and grows to both sides zigzag while loading on ZrO2 layer. Flexural strengths are 496.4, 421.7 and 387.5 MPa when gradient changes are 10%, 15% and 20%, but flexural strengths
of the corresponding fracture layers are 387.1, 334.6 and 282.3 MPa since cracks of FGMs are affected by three-dimensional
stress, respectively. The cracks are generated in ZrO2 layer and extend to SUS316L layer while loading is added on SUS316L layer, flexural strength does not change with the graded
components and keeps consistent basically. |
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| Keywords: | ZrO_2 functionally graded materials flexural strength fracture tape casting |
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