caa a22 4500 388019190 CHVBK 20180307124919.0 cr unu---uuuuu 161130e199810 xx s 000 0 eng 10.1557/JMR.1998.0394 doi S088429140004629X pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0394 Metal ceramic interface toughness II: Mechanisms of fracture and energy dissipation [Elektronische Daten] Based on observations of plasticity on fracture surfaces, we propose two fracture mechanism for Ni-sapphire interfaces. A brittle-type mechanism is proposed for the decohesion of Ni from sapphire by which cracks advance in increments of 20 nm. When particulates that increase the interface strength are present, debonding occurs at the leading edge of the particulate, and unsteady crack advance occurs. Additionally, toughening mechanisms are proposed for each type of plasticity feature observed, and the fracture energy of each mechanism is quantified. Comparison of energy dissipated by these mechanisms with measured fracture energies indicates how the fracture energy of the interface varies with sulfur segregation and environmental embrittlement. Copyright © Materials Research Society 1998 Kiely J. D. The University of Pennsylvania, Philadelphia Pennsylvania 19104 Bonnell D. A. The University of Pennsylvania, Philadelphia Pennsylvania 19104 Journal of Materials Research Cambridge University Press 13/10(1998-10), 2881-2887 0884-2914 13:10<2881 1998 13 JMR https://doi.org/10.1557/JMR.1998.0394 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0394 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kiely J. D. The University of Pennsylvania, Philadelphia Pennsylvania 19104 NATIONALLICENCE 700 1- Bonnell D. A. The University of Pennsylvania, Philadelphia Pennsylvania 19104 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/10(1998-10), 2881-2887 0884-2914 13:10<2881 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge