Hostname: page-component-6bf8c574d5-vmclg Total loading time: 0 Render date: 2025-02-22T16:47:39.835Z Has data issue: false hasContentIssue false
  • English
  • Français

Interfacial Fracture Between Boron Nitride And Silicon Nitride And Its Applications To The Failure Behavior Of Fibrous Monolithic Ceramics

Published online by Cambridge University Press:  15 February 2011

D. Kovar ,
G.A. Brady ,
M.D. Thouless  and
J.W. Halloran
D. Kovar
Affiliation:
Materials Science and Engineering Dept.
G.A. Brady
Affiliation:
Materials Science and Engineering Dept.
M.D. Thouless
Affiliation:
Mechanical Engineering and Applied Mechanics Dept., University of Michigan, Ann Arbor, MI 48109–2136
J.W. Halloran
Affiliation:
Materials Science and Engineering Dept.
Get access

Abstract

Mechanical tests show that fibrous monolithic ceramics can exhibit graceful failure in bending due to marked crack deflection at silicon nitride/boron nitride interfaces. Model sandwich specimens were manufactured from polycrystalline silicon nitride with interphases consisting of mixtures of silicon nitride and boron nitride. The interfacial fracture resistances of the specimens were measured, and the results were correlated to the failure behavior of fibrous monolithic ceramics. It was found that the three modes of failure observed in fibrous monoliths can be correlated with the interfacial fracture resistance. In addition, anisotropy in the properties of the interphases were found to have a profound influence on crack deflection.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 409: Symposium Q – Fracture-Instablility Dynamics, scaling and Ductile/Brittle Behavior , 1995 , 243
Copyright
Copyright © Materials Research Society 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Hilmas, G., Brady, A., Abdali, U., Zywicki, G., and Halloran, J., “Fibrous Monoliths: Non-Brittle Fracture from Powder Processed Ceramics,” Mat. Sci. Eng. A A 915, 263 (1995).Google Scholar
2 Charalambides, P. G., Lund, J., Evans, A.G., and McMeeking, R.M., “A Test Specimen for Determining the Fracture Resistance of Bimaterial Interfaces,” J. App. Mech. 56 (3), 77 (1989).Google Scholar
3 Suo, Z. and Hutchinson, J.W., “Sandwich Test Specimen for Measuring Interface Crack Toughness,” Mat. Sci. Eng. A 107, 135 (1989).Google Scholar
4 Hutchinson, J. W. and Suo, Z. in Advances in Applied Mechanics, Vol 29, edited by Hutchinson, J.W. and Wu, T.Y. (Academic Press, Inc., San Diego, CA, 1992), p. 64.Google Scholar
5 Thouless, M. D., “Fracture of a Model Interface Under Mixed-Mode Loading,” Acta Metall. Mater. 38 (6), 1135 (1990).Google Scholar
6 He, M.-Y. and Hutchinson, J.W., “Crack Deflection at an Interface Between Dissimilar Elastic Materials,” Int. J. Solids Structures, 25 (9) 1053 (1989).Google Scholar
7 Edgar, J.H. in Properties of Group III Nitrides edited by Edgar, J.H.. (INSPEC, London, U.K., 1994), p. 7 Google Scholar