(Dynamic Behavior of Brittle Materials) Response and Failure Modes of Silicon Nitride.
Abstract
Silicon nitride is a potential candidate for several high temperature structural applications, like heat engine components, cutting tool inserts, bearings, and wear parts. In use, the ceramic component is often subject to dynamic loading conditions at elevated temperatures. Hence, it is necessary to evaluate the performance of the material under dynamic loading conditions over a range of temperatures. This research project focused on the behavior of in situ reinforced silicon nitride, under dynamic compressive loading, over a range of temperatures. Novel experimental (the Split Hopkinson Compression Bar) and analytical (Differential Strain Measurement) techniques have been developed to aid the evaluation of the dynamic properties of in situ reinforced silicon nitride over a range of temperatures. The properties (primarily, the elastic modulus and the failure stress) of the material has been studied from room temperature to 1000 deg C. The experimental work has been supplemented by microstructural studies, both before and after testing, in order to gain an insight into the mechanisms of failure.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1999
- Accession Number
- ADA365296
Entities
People
- Sia Nemat-nasser
Organizations
- University of California, San Diego