Hermetic glass bodies with controlled porosity: processing and properties
This paper deals with glasses and ceramics containing closed (isolated) porosity. After an introduction focusing on the applications and relevance of porous hermetic materials, a processing approach developed to produce hermetic porous glass bodies containing well-defined spheroidal pores is presented. The method is based on the addition of hollow glass microspheres to a glass powder and densification by hot-pressing. Porous glass specimens containing "designed" porosity are shown to be very useful as model material in a variety of applications. In this paper model porous glasses are analysed by means of a microstructure-based numerical model (OOF) adapted to predict crack-pore interactions. The suitability of the porous glass to be used as reference porous brittle materials for mechanical tests is illustrated by measurements of Young's modulus and hardness using instrumented indentation technique.
Bibliographic Reference: An oral report given at: 26th Annual International Conference on Advanced Ceramics and Composites, "Ceramics in the New Millenium" Organised by: American Ceramic Society Held at: Cocoa Beach (US), 13-18 January 2002
Record Number: 200214526 / Last updated on: 2002-04-03
Original language: en
Available languages: en