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Elastic Deformation in Hardness Test and Young's Modulus of Hipped Si3N4

Published online by Cambridge University Press:  15 February 2011

Toyohiro Hamasaki  and
K. Ishizaki
Toyohiro Hamasaki
Affiliation:
Nagaoka University of Technology, Dept. of Material Science and Engineering, School of Mechanical Engineering, Nagaoka, Niigata 940–21, Japan.
K. Ishizaki
Affiliation:
Nagaoka University of Technology, Dept. of Material Science and Engineering, School of Mechanical Engineering, Nagaoka, Niigata 940–21, Japan.
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Abstract

The relationship between sintering conditions and mechanical properties were examined for fully densified Si3N4 with different, β phase fractions (0.2 to 1). The samples were sintered by a capsule-HIP method with Y2O3 and Al2O3 additives (6 mol% in total) at temperatures between 1823 to 2023 K, under 60 MPa for 1 hour. The elastic deformation was calculated by Vickers indentation recovery. The Vickers hardness reached the maximum value for a β phase fraction of about 0.5, while fracture toughness, elastic deformation, and Young's modulus increased as the β phase content augmented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 251: Symposium S – Pressure Effects on Materials Processing and Design , 1991 , 193
Copyright
Copyright © Materials Research Society 1992

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References

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