Comportamiento mecánico a alta temperatura de cerámicas de nitruro de silicio

J. J. Meléndez-Martínez; A. Ramírez de Arellano-López; M. Jiménez-Melendo; A. Domínguez-Rodríguez

doi:10.3989/revmetalm.2001.v37.i2.480

High temperature mechanical behaviour of silicon nitride ceramics

Authors

J. J. Meléndez-Martínez Departamento de Física de la Materia Condensada. Universidad de Sevilla.
A. Ramírez de Arellano-López Departamento de Física de la Materia Condensada. Universidad de Sevilla.
M. Jiménez-Melendo Departamento de Física de la Materia Condensada. Universidad de Sevilla.
A. Domínguez-Rodríguez Departamento de Física de la Materia Condensada. Universidad de Sevilla.

DOI:

https://doi.org/10.3989/revmetalm.2001.v37.i2.480

Keywords:

Ceramic materials, Microstructure, Mechanical properties, Deformation mechanisms,

Abstract

The high temperature mechanical behaviour of two silicon nitride-based ceramic materials has been studied: N 7202, made by low pressure sintering with yttria, alumina and magnesia as additives, and N 3208, made by high pressure sintering with yttria and alumina as additives. Both materials are β-silicon nitride. The results have been analysed in terms of the classical creep equation. The stress exponent was n = 0.4 for N 7202 and n = 0.5 for N 3208, whereas the average apparent activation energy was Q ≈ 500 kJ/mole for both materials.Transmission electron microscopy studies have allowed to determine the microstructural features of these materials.

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Published

2001-04-30

How to Cite

Meléndez-Martínez, J. J., Ramírez de Arellano-López, A., Jiménez-Melendo, M., & Domínguez-Rodríguez, A. (2001). High temperature mechanical behaviour of silicon nitride ceramics. Revista De Metalurgia, 37(2), 277–280. https://doi.org/10.3989/revmetalm.2001.v37.i2.480

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Issue

Vol. 37 No. 2 (2001)

Section

Articles

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