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Abstract

Zirconia represents one of the most advanced ceramic materials in the field of high temperature applications due to the strength given by adding a percentage of yttria. Acoustic emission was employed in order to characterise material behaviour up to fracture and to observe all the phenomena involved, both in initiation and propagation of microcracks. The zirconia was taken to failure by four points bending. In this case the large number of specimens submitted to bending tests made it possible to apply Weibull statistical laws and also to evaluate the possibilities of acoustic emission as a monitoring technique for damage in ceramic materials even in such severe mechanical tests, when the very short time from loading to fracture acts as an additional stressing factor.

Additional information

Authors: BILLI F, Università di Roma 'La Sapienza', Dipartimento di Ingegneria Chimica e dei Materiali (IT);CANEVA C, Università di Roma 'La Sapienza', Dipartimento di Ingegneria Chimica e dei Materiali (IT);SANTULLI C, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 10(o) Convegno Nazionale I.G.F., Torino (IT), Giugno 8-10, 1994
Availability: Available from (1) as Paper IT 38425 ORA
Record Number: 199410906 / Last updated on: 1994-11-28
Category: PUBLICATION
Original language: it
Available languages: it