THERMAL CONDUCTIVITY OF BIOMORPHIC POROUS SIC BASED CERAMICS

Beitrag bei einer Tagung
(Konferenzbeitrag)


Details zur Publikation

Autor(en): Popovska N, Alkhateeb E, Kugler T, Fröba AP, Leipertz A
Jahr der Veröffentlichung: 2010
Seitenbereich: 313-316


Abstract


Biomorphic porous SiC composite ceramics were produced by chemical vapor infiltration and reaction (CVI-R) technique using paper preforms as template. The thermal conductivity of four samples with different composition and microstructure was investigated: a) C-template b) C-SiC, c) C-SiC-Si3N4 and d) SiC coated with a thin layer of TiO2. The SiC-Si3N4 composite ceramic showed enhanced oxidation resistance compared to single phase SiC. However; a key property for the application of these materials at high temperatures is their thermal conductivity. The later was determined experimentally at defined temperatures in the range 298-373K with a laser flash apparatus. It was found that the thermal conductivity of the porous ceramic composites increases in the following order: C-template < C-SiC < C-SiC-Si3N4 < SiC-TiO2. The results were interpreted in regard to the porosity and the microstructure of the ceramics.



FAU-Autoren / FAU-Herausgeber

Alkhateeb, Emad
Lehrstuhl für Chemische Reaktionstechnik
Fröba, Andreas Paul Prof. Dr.-Ing.
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties
Kugler, Tanja
Professur für Advanced Optical Technologies - Thermophysical Properties
Leipertz, Alfred Prof. Dr.-Ing.
Lehrstuhl für Technische Thermodynamik
Popovska, Nadejda Prof. Dr.
Technische Fakultät


Zitierweisen

APA:
Popovska, N., Alkhateeb, E., Kugler, T., Fröba, A.P., & Leipertz, A. (2010). THERMAL CONDUCTIVITY OF BIOMORPHIC POROUS SIC BASED CERAMICS. (pp. 313-316). Washington D.C., US.

MLA:
Popovska, Nadejda, et al. "THERMAL CONDUCTIVITY OF BIOMORPHIC POROUS SIC BASED CERAMICS." Proceedings of the 14th International Heat Transfer Conference, Washington D.C. 2010. 313-316.

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Zuletzt aktualisiert 2018-10-08 um 03:43