The strengths of porous phosphate glass-ceramic specimens, with relative densities ranging between 0.25 and 0.50, were measured by four-point bending at room temperature. An analysis of the data, using Weibull statistics, indicated that such a treatment, usually performed on dense ceramics, can also be used on porous materials. In the sets studied, the nature of critical flaws was determined, which led to the proposal of a mechanism of fracture initiation in such porous materials.
Origin
Laboratorie Des Verres, France
Journal Title
J Am Ceram Soc 82 3 1999 641-648
Sector
Glass Ceramics
Class
GC 344