Young’s modulus and Poisson’s ratio changes due to machining in porous microcracked cordierite

Microstructural changes in porous cordierite caused by machining were characterized using microtensile testing, X-ray computed tomography, and scanning electron microscopy. Young’s moduli and Poisson’s ratios were determined on ~215- to 380-μm-thick machined samples by combining digital image correl...

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Bibliographic Details
Published in:Journal of materials science 2016-11, Vol.51 (21), p.9749-9760
Main Authors: Cooper, R. C., Bruno, G., Onel, Y., Lange, A., Watkins, T. R., Shyam, A.
Format: Article
Language:English
Subjects:
Air pollution
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Computed tomography
Cordierite
Crystallography and Scattering Methods
CT imaging
Diesel
diesel particulate filter (DPF)
Digital imaging
Fluid filters
Honeycomb
Machining
MATERIALS SCIENCE
microcracking
Microcracks
Modulus of elasticity
Original Paper
Poisson's ratio
Poissons ratio
Polymer Sciences
Porosity
Scanning electron microscopy
Solid Mechanics
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Summary:Microstructural changes in porous cordierite caused by machining were characterized using microtensile testing, X-ray computed tomography, and scanning electron microscopy. Young’s moduli and Poisson’s ratios were determined on ~215- to 380-μm-thick machined samples by combining digital image correlation and microtensile loading. The results provide evidence for an increase in microcrack density and decrease of Young’s modulus due to machining of the thin samples extracted from diesel particulate filter honeycombs. This result is in contrast to the known effect of machining on the strength distribution of bulk, monolithic ceramics.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-016-0209-9