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Thermal Shock Behaviour of Thin Bi-Material Ceramic Systems

Published online by Cambridge University Press:  10 February 2011

E. P. Busso ,
Y. V. Tkach  and
R. P. Travis
E. P. Busso
Affiliation:
Mechanical Engineering Department, Imperial College, London SW7 2BX, United Kingdom
Y. V. Tkach
Affiliation:
Mechanical Engineering Department, Imperial College, London SW7 2BX, United Kingdom
R. P. Travis
Affiliation:
Mechanical Engineering Department, Imperial College, London SW7 2BX, United Kingdom
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Abstract

This work describes a methodology developed to predict the thermal shock behaviour of thin bi-material ceramic systems. An experimental procedure based on controlled air cooling has been devised to simulate the flow of a gas stream over the surface of a thin two-layer ceramic system. Results of microstructural and fractographic investigations conducted on tested samples, including representative fracture patterns and crack initiation sites, are presented. A probabilistic-deterministic approach to predict the thermal shock behaviour of bi-material ceramic systems is proposed. Failure diagrams are constructed from a combination of the experimental and analytical studies. Critical thermal transient conditions typical of start-up and shut-down operation in solid oxide fuel cell are determined.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 594: Symposium V – Thin Films - Stresses & Mechanical Properties VIII , 1999 , 31
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

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