Application of AM–DCB method to the high–temperature R–curve study of a Si3N4 ceramics
Elsevier, 1994
Online
unknown
Zugriff:
R-curve behavior of an in-situ toughened silicon nitride ceramics with well developed rod-like β-Si3N4 grain microstructure was studied in air at room and elevated temperatures by using modified Applied Moment-Double Cantilever Beam (AM-DCB) technique. Conventional AM-DCB test was improved to estimate the crack growth resistance without measuring the crack length even at elevated temperatures by the use of T-shaped specimen geometry in displacement controlled test. The toughness increment determined in this material was extremely sensitive to test temperatures, although the initial fracture toughness associated with the frontal process zone shielding was not so up to 1150 °C. Through a J-integral approach, the increase of the crack growth resistance was attributed to the change in intact bridging mechanisms.
Titel: |
Application of AM–DCB method to the high–temperature R–curve study of a Si3N4 ceramics
|
---|---|
Autor/in / Beteiligte Person: | Miyajima, Tatsuya ; Ohji, Tatsuki ; Yamauchi, Yukihiko |
Link: | |
Veröffentlichung: | Elsevier, 1994 |
Medientyp: | unknown |
DOI: | 10.1016/b978-0-444-81991-8.50111-4 |
Schlagwort: |
|
Sonstiges: |
|