Pyrolysis of preceramic polymers allows a new type of ceramic materials to be processed at a relatively low temperature. The ceramics via polymer pyrolysis display a number of exceptional mechanical, thermal and chemical properties, including high thermal stability, high oxidation/creep resistance, etc. Moreover, they offer better geometrical accuracy compared to conventional ceramics. In addition, thermal induced pyrolysis of organometallic polymer precursors offers the possibility of net shape manufacturing at a lower temperature compared to traditional powder sintering process. The pyrolysis of polymer precursors involves curing of polymer precursors in which the polymer undergoes cross-linking to form a green body, followed by a pyrolysis stage that involves the formation of amorphous SiC and crystallization of SiC at a higher temperature. The source material changes phase and composition continuously during polymer pyrolysis based ceramic process. Chemical reactions and transport phenomena vary accordingly. To obtain ceramics with high uniformity of microstructure and species without crack, transport phenomena in material processing needs to be better understood and a process model needs to be developed to optimize the fabrication process. In this paper, a numerical model is developed, including heat and mass transfer, polymer pyrolysis, species transport, chemical reactions and crystallization. The model is capable of accurately predicting the polymer pyrolysis and chemical reactions of the source material. Pyrolysis of a sample with certain geometry is simulated. The effects of heating rate, particle size and initial porosity on porosity evolution, mass loss and reaction rate are investigated. Optimal conditions for the manufacturing are also proposed.
Skip Nav Destination
ASME 2006 International Mechanical Engineering Congress and
Exposition
November 5–10, 2006
Chicago, Illinois, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4785-3
PROCEEDINGS PAPER
Advanced Process Model for Polymer Derived Ceramic Processing
Xiaolin Wang,
Xiaolin Wang
State University of New York at Stony Brook
Search for other works by this author on:
Suraj C. Zunjarrao,
Suraj C. Zunjarrao
State University of New York at Stony Brook
Search for other works by this author on:
Hui Zhang,
Hui Zhang
State University of New York at Stony Brook
Search for other works by this author on:
Raman P. Singh
Raman P. Singh
State University of New York at Stony Brook
Search for other works by this author on:
Xiaolin Wang
State University of New York at Stony Brook
Suraj C. Zunjarrao
State University of New York at Stony Brook
Hui Zhang
State University of New York at Stony Brook
Raman P. Singh
State University of New York at Stony Brook
Paper No:
IMECE2006-13824, pp. 529-537; 9 pages
Published Online:
December 14, 2007
Citation
Wang, X, Zunjarrao, SC, Zhang, H, & Singh, RP. "Advanced Process Model for Polymer Derived Ceramic Processing." Proceedings of the ASME 2006 International Mechanical Engineering Congress and Exposition. Heat Transfer, Volume 2. Chicago, Illinois, USA. November 5–10, 2006. pp. 529-537. ASME. https://doi.org/10.1115/IMECE2006-13824
Download citation file:
8
Views
0
Citations
Related Proceedings Papers
Related Articles
Magnetized Fiber Orientation Control in Solidifying Composites: Numerical Simulation
J. Heat Transfer (February,1993)
Determination of Chemical Kinetic Parameters of Surrogate Solid Wastes
J. Eng. Gas Turbines Power (October,2004)
A Simulation-Based Correlation of the Density and Thermal Conductivity of Objects Produced by Laser Sintering of Polymer Powders
J. Manuf. Sci. Eng (August,2000)
Related Chapters
On the Evaluation of Thermal and Mechanical Factors in Low-Speed Sliding
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
Thermoset Materials
Introduction to Plastics Engineering
Completing the Picture
Air Engines: The History, Science, and Reality of the Perfect Engine