Frontiers of Mechanical Engineering >

2012 , Vol. 7 >Issue 4: 371 - 375

DOI: https://doi.org/10.1007/s11465-012-0339-y

RESEARCH ARTICLE

Feasibility study of plasma sprayed Al2O3 coatings as diffusion barrier on CFC components

  • Kirsten BOBZIN ,
  • Lidong ZHAO ,
  • Nils KOPP ,
  • Thomas WARDA
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  • Surface Engineering Institute, RWTH Aachen University, 52072 Aachen, Germany

Received date: 10 Jun 2012

Accepted date: 12 Aug 2012

Published date: 05 Dec 2012

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg
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Abstract

Carbon fibre reinforced carbon (CFC) materials are increasingly applied as sample carriers in modern furnaces. Only their tendency to react with different metals at high temperatures by C-diffusion is a disadvantage, which can be solved by application of diffusion barriers. Within this study the feasibility of plasma sprayed Al2O3 coatings as diffusion barrier was studied. Al2O3 coatings were prepared by air plasma spraying (APS). The coatings were investigated in terms of their microstructure, bonding to CFC substrates and thermal stability. The results showed that Al2O3 could be well deposited onto CFC substrates. The coatings had a good bonding and thermal shock behavior at 1060°C. At higher temperature of 1270°C, crack network formed within the coating, showing that the plasma sprayed Al2O3 coatings are limited regarding to their application temperatures as diffusion barrier on CFC components.

Key words： diffusion barrier coatings; CFC; plasma spraying; microstructure; Al2O3

Cite this article

Kirsten BOBZIN , Lidong ZHAO , Nils KOPP , Thomas WARDA . Feasibility study of plasma sprayed Al2O3 coatings as diffusion barrier on CFC components[J]. Frontiers of Mechanical Engineering, 2012 , 7(4) : 371 -375 . DOI: 10.1007/s11465-012-0339-y

Acknowledgements

The IGF Project No. 14.880N/DVS No. 2.050 of the Research Association on Welding and Allied Processes of the German Welding Society (DVS) was, on the basis of a resolution of the Lower House of the German Parliament, promoted by the German Federal Ministry of Economics and Technology (BMWi) via AiF within the framework of the programme for promotion of joint industrial research and development (IGF). The authors thank all the participants for the funding and support.

References

Publishing order | Descend order by publishing year | Descend order by cited within
1
Klein J. Carbon-carbon composites. Advanced Materials & Process, 1986, 130: 64–68

2
Buckley J D. Carbon-carbon an overview. American Ceramic Bulletin, 1988, 67: 364–368

3
Bobzin K, Zhao L, Schlaefer T, Warda T. Development of oxide based diffusion barrier coatings for CFC components applied in modern furnaces. Frontiers of Mechanical Engineering, 2011, 6(4): 392–396

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