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Progress in adapting the Investment Casting of NiAl

Published online by Cambridge University Press:  10 February 2011

F. Scheppe ,
H. Rothe  and
P. R. Sahm
F. Scheppe
Affiliation:
Foundry Institute, RWTH Aachen – Technical University of Aachen, Germany
H. Rothe
Affiliation:
Foundry Institute, RWTH Aachen – Technical University of Aachen, Germany
P. R. Sahm
Affiliation:
Foundry Institute, RWTH Aachen – Technical University of Aachen, Germany
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Abstract

NiAl alloys offer significant advantages as structral materials in gas turbine applications due to a unique range of physical and mechanical properties. The high melting point and low RT plasticity of NiAl alloys present special problems for mold materials. Typical shell molds for advanced superalloys are very close to there application limits. On the one hand it is necessary to keep the SiO2 level as low as possible, but on the other hand the mold has to be strong enough for the cast process and weak enough to allow for the contraction of the metal during the solidification. The result of this research is the application of a SiO2 shell mold for a heat shield. To scale up these results to production and quantities will be the further work.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK5.21.1
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

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