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Ultra-micro indentation technique used for examination of mechanical properties close to a HIPed surface of silicon nitride
CSIRO, Division of Applied Physics, Lindfield.
CSIRO, Division of Applied Physics, Lindfield.
CSIRO, Division of Applied Physics, Lindfield.
1998 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 18, no 7, p. 879-890Article in journal (Refereed) Published
Abstract [en]

Ultra-micro indentation using both pointed and spherical tipped indenters has been used to characterize mechanical properties of silicon nitride densified by glass encapsulated hot isostatic pressing (HIP). Young's modulus and hardness have been studied as a function of distance to the interface between silicon nitride and the encapsulation glass. The Young's modulus values are 10 to 20% lower in the close vicinity of the silicon nitride surface compared to bulk values. At distances of 75 to 150 microns from the glass-silicon nitride interface, bulk values are measured. The differences in hardness values between the region close to the surface and the bulk is less pronounced. A possible explanation for these gradients is formation of new phases at the surface of the silicon nitride. Routines for the calibration of both the pointed and spherical tipped indenters are presented

Place, publisher, year, edition, pages
1998. Vol. 18, no 7, p. 879-890
National Category
Other Materials Engineering
Research subject
Material Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-15451DOI: 10.1016/S0955-2219(97)00216-1ISI: 000074654300018Local ID: ef715040-f4aa-11db-ac9f-000ea68e967bOAI: oai:DiVA.org:ltu-15451DiVA, id: diva2:988425
Note
Godkänd; 1998; 20070427 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Westman, Anna-Karin

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