We gratefully acknowledge the Center for Non-Destructive Evaluation (CNDE), Indian Institute of Technology Madras for providing access to ultrasonic non-destructive testing.
Small-Scale Deformation of Pulsed Electric Current Sintered Silicon Oxycarbide Polymer Derived Ceramics
Article first published online: 24 JUL 2013
© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Volume 15, Issue 11, pages 1040–1045, November 2013
How to Cite
Sujith, R., Srinivasan, N. and Kumar, R. (2013), Small-Scale Deformation of Pulsed Electric Current Sintered Silicon Oxycarbide Polymer Derived Ceramics. Adv. Eng. Mater., 15: 1040–1045. doi: 10.1002/adem.201300146
- Issue published online: 4 NOV 2013
- Article first published online: 24 JUL 2013
- Manuscript Accepted: 10 JUN 2013
- Manuscript Received: 21 APR 2013
- Center for Non-Destructive Evaluation (CNDE), Indian Institute of Technology Madras
The deformation behavior of pulsed electric current sintered silicon oxycarbide ceramics produced by the solid-state thermolysis of polyhydridomethylsiloxane at small-scale is investigated. The ceramics remained X-ray amorphous after sintering at 1300 °C in vacuum and a high density of ≈2.35 g cm−3 is achieved. The elastic constants of these ceramics are determined using non-destructive ultrasonic testing method. The elasto-plastic deformation under contact loading is determined using depth sensing nanoindentation technique. An indentation hardness of ≈11 GPa and reduced elastic modulus of ≈105 GPa is observed. The load–displacement curves display significant elastic recovery with an elastic work ratio of ≈0.71. The evolution of Hertzian cone cracks upon microindentation indicates an anomalous deformation behavior.