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Effect Of Ceramic Dispersoids On The High Temperature Strength Of Mechanically Alloyed MoSi2

Published online by Cambridge University Press:  26 February 2011

Y.S. Kim
Affiliation:
Dept. of Materials Science & Engineering, University of Florida, Gainesville, FL 32611
M.R. Johnson
Affiliation:
Dept. of Materials Science & Engineering, University of Florida, Gainesville, FL 32611
R. Abbaschian
Affiliation:
Dept. of Materials Science & Engineering, University of Florida, Gainesville, FL 32611
M.J. Kaufman
Affiliation:
Dept. of Materials Science & Engineering, University of Florida, Gainesville, FL 32611
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Abstract

Mechanical alloying (MA) has been used to synthesize MoSi2 from elemental Mo and Si powders. SiC and A12O3 dispersoids were also incorporated as a means of increasing high temperature strength. After synthesis, the powders were consolidated using vacuum hot pressing. It is shown that the size and volume fraction of porosity increases anomalously with increasing hot pressing temperature over the range 1200 to 1700°C. The strengths of the A12O3 composite are, in most instances, considerably higher than the monolithic material produced under similar conditions.

Type
Research Article
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

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