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Investigation of Toughening and Resistance‐Curve Behavior in Hybrid Molybdenum Disilicide
Author(s) -
Ye Fan,
Li Mingwei,
Soboyejo Winston O.
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02104.x
Subject(s) - materials science , toughening , molybdenum disilicide , composite material , bridging (networking) , micromechanics , yttria stabilized zirconia , composite number , niobium , molybdenum , metallurgy , toughness , cubic zirconia , ceramic , computer network , computer science
This paper presents the results of a study of the toughening and resistance‐curve behavior in a hybrid molybdenum disilicide (MoSi 2 ) composite that has been reinforced with 2 mol% yttria partially stabilized zirconia particles (TZ‐2Y) and niobium layers. Toughening and resistance‐curve behavior occur as a result of the combined effects of crack bridging and transformation toughening. Crack‐tip shielding that is due to large‐scale crack bridging and transformation toughening also is modeled using micromechanics concepts. The models show that the overall crack‐tip shielding from transformation toughening is very limited. However, large‐scale bridging by the ductile niobium layers promotes significant levels of toughening and resistance‐curve behavior.