ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
This paper presents the results of a study of the toughening and resistance-curve behavior in a hybrid molybdenum disilicide (MoSi2) 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.1999.tb02104.x
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