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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Veröffentlicht in:	Journal of materials science 2016-11, Vol.51 (21), p.9749-9760
Hauptverfasser:	Cooper, R. C., Bruno, G., Onel, Y., Lange, A., Watkins, T. R., Shyam, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	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