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Fabrication of Volumetric Dilatometer Using Buoyancy Under High Pressure Gas

Published online by Cambridge University Press:  15 February 2011

Makoto Nanko ,
W. Sakayori ,
K. Ishizaki ,
K. Uehara  and
M. Ueda
Makoto Nanko
Affiliation:
Nagaoka University of Technology, Department of Materials science and Engineering, School of Mechanical Engineering, Nagaoka, Niigata 940–21, Japan
W. Sakayori
Affiliation:
Nagaoka University of Technology, Department of Materials science and Engineering, School of Mechanical Engineering, Nagaoka, Niigata 940–21, Japan
K. Ishizaki
Affiliation:
Nagaoka University of Technology, Department of Materials science and Engineering, School of Mechanical Engineering, Nagaoka, Niigata 940–21, Japan
K. Uehara
Affiliation:
Kobe Steel Ltd., Kobe 651, Japan.
M. Ueda
Affiliation:
Kobe Steel Ltd., Kobe 651, Japan.
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Abstract

Sintering processes are monitored by dilatometry. A conventional dilatometer under high gas pressure (typical HIPping conditions) is constructed using graphite rods to examine linear thermal expansivity of one sample. This method has a few disadvantages, such as the pressure of graphite rods acting as a uniaxial hot press. The advantage of a HIP method, compared to a hot press sintering is the capacity to process many samples at a time. The graphite rod method is applicable for only one sample. A volumetric dilatometer was developed using buoyancy under high gas pressure, which can monitor HIP sintering processes of many samples and check for capsule failure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 251: Symposium S – Pressure Effects on Materials Processing and Design , 1991 , 39
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

1. for example, see Buchkremer, H. P., Hecher, R., Stover, D. and Raes, H., in Proceeding of the Second International Conference on Hot Isostatic Pressing: Theory and Applications, edited by Schaefer, R. J. and Linzer, M. (ASM International, Gaitherburg, MD 7–9 June 1989) pp. 349–354.Google Scholar
2. Ishizaki, K., Uehara, K. and Ueda, M., Japanese patent pending (1990).Google Scholar
3. Lee, John Francis and Sears, Francis Weston, Thermodynamics. 2nd ed. (Addison-Wesley Publishing Company, Menlo Park, 1962), p.56.Google Scholar