Deduction of thermal properties of plasma sprayed ceramic coatings from the microstructure
- Univ. of Stuttgart (Germany). Inst. for Computer Applications
This paper deals with the development of analytical as well as numerical models for the description of the thermal conductivity of plasma sprayed ceramic layers. Considering pores embodied in the layer, art analytical model is developed, based on the description of the pores as rotational ellipsoids. This approach allows an estimation of the reduction of the thermal conductivity as a function of pore volume, orientation and geometrical shape. A distribution in pore volume and a possible variation of the overall porosity across the thickness of the layer are taken into account. Further, the appearance of anisotropy is predicted and studied in the case of non-spherical pores. Additionally, a finite element calculation is utilized to assess the validity of the analytical approach. The influence of the pores on the specific heat capacity of the material is modeled as a purely volume effect.
- OSTI ID:
- 82885
- Report Number(s):
- CONF-940113-; ISBN 0-7918-1190-5; TRN: IM9533%%343
- Resource Relation:
- Conference: 17. American Society of Mechanical Engineers (ASME) energy-sources technology conference and exhibition (ETCE), New Orleans, LA (United States), 23-26 Jan 1994; Other Information: PBD: 1994; Related Information: Is Part Of Materials and design technology -- 1994. PD-Volume 62; Kozik, T.J. [ed.] [Texas A and M Univ., College Station, TX (United States)]; PB: 395 p.
- Country of Publication:
- United States
- Language:
- English
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