Abstract
A round-robin study was conducted on the flexural, shear, and tensile mechanical behavior of a NicalonTM fiber reinforced SylramicTM matrix CFCC continuous fibre ceramic composite (CFCC). The goals of the US DOE/USAF-funded study were: i) to determine the precision and bias of ASTM Test Methods C1341 (flexure), C1292 (shear) and C1275 (tension); ii) to establish an expansive data base (e.g., Mil-Hdbk-17 CMC effort) for a single CFCC; and iii) to evaluate a statistically-significant sample size of a single CFCC for processing and design purposes. The Dow Corning-produced CFCC was comprised of 8 plies of ceramic grade NicalonTM fabric in a symmetric 0/90 lay-up, a proprietary boron-containing interphase, and a silicon nitrocarbide matrix derived from polysilazane. As part of the major round-robin study, ten each of flexure, in-plane tension, in-plane (Iosipescu) shear, and interlaminar (double notch compression) test specimens were tested by each of 6 to 10 different laboratories per the applicable ASTM standard test method for totals of 60 to 100 replicate tests for each test type. In addition, mini round robins were conducted using draft ASTM standards for transthickness tension and thermal properties. With a few exceptions, repeatability and reproducibility of the test results ranged from 5 to 10%. In addition to helping establish precision and bias statements for the ASTM standards, actual results on properties and performance will be included in the Mil-Hdbk-17 effort on CMCs for data review and data base development.
Original language | English |
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Pages (from-to) | 595-604 |
Number of pages | 10 |
Journal | Ceramic Engineering and Science Proceedings |
Volume | 20 |
Issue number | 3 |
State | Published - 1999 |
Externally published | Yes |
Event | Proceedings of the 1999 23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - Cocoa Beach, FL, USA Duration: Jan 25 1999 → Jan 29 1999 |