Effect of high-temperature loading on mechanical properties of Nicalon fibers and Nicalon fiber/SiC matrix composites
Results of an investigation into the effect of elevated temperature exposure on the strength distribution of Nicalon fibers as well on mechanical properties of Nicalon/SiC composites are reported in this paper. Single-fiber strength distribution of as-fabricated Nicalon fibers was obtained from bundle tests. Strength distributions of fractured fibers in as-fabricated Nicalon/SiC composites and after elevated temperature exposure of composites were assessed from measurements of fracture mirror radii. Variations in the mechanical properties of composites evaluated as a function of test temperatures are compared with those evaluated at room temperature and are correlated to the fiber strength characteristics. Limited tests were also conducted to investigate the effect of long term exposure at elevated temperatures on composite ultimate strength.
- Research Organization:
- Argonne National Lab., IL (United States). Materials and Components Technology Div.
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6763260
- Report Number(s):
- ANL/MCT/CP-76993; CONF-930164-3; ON: DE93006420
- Resource Relation:
- Conference: 17. annual conference on composites and advanced ceramics, Cocoa Beach, FL (United States), 11-15 Jan 1993
- Country of Publication:
- United States
- Language:
- English
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