Interface oxidation and stress-rupture of Nicalon{trademark}/SiC CFCCs at intermediate temperatures

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Description

The effect of oxidation of the carbonaceous fiber coating on the intermediate temperature stress-rupture behavior of a Nicalon{trademark}/C/SiC continuous fiber composite was modeled. The model, that was reduced to the analysis of a general ideal bundle composed of classical fibers subjected to constant loading, predicts that the oxidation of the fiber coating triggers a sequence of processes that can lead, under certain conditions, to composite failure. These processes involve loss of stress transfer between the fiber and the matrix, fiber overloading, and fiber failure. The implications of the model predictions are discussed in relation to experimental measurements at 425 C ... continued below

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14 p.

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Lara-Curzio, E.; Ferber, M.K. & Tortorelli, P.F. October 1, 1996.

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Description

The effect of oxidation of the carbonaceous fiber coating on the intermediate temperature stress-rupture behavior of a Nicalon{trademark}/C/SiC continuous fiber composite was modeled. The model, that was reduced to the analysis of a general ideal bundle composed of classical fibers subjected to constant loading, predicts that the oxidation of the fiber coating triggers a sequence of processes that can lead, under certain conditions, to composite failure. These processes involve loss of stress transfer between the fiber and the matrix, fiber overloading, and fiber failure. The implications of the model predictions are discussed in relation to experimental measurements at 425 C in air that show that Nicalon{trademark}/C/SiC exhibits time-dependent loss of strength.

Physical Description

14 p.

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OSTI as DE97000469

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  • 1. international conference on ceramic and metal matrix composites (CMMC-1), San Sebastian (Spain), 9 Sep 1996

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  • Other: DE97000469
  • Report No.: CONF-9609265--1
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/392825 | External Link
  • Office of Scientific & Technical Information Report Number: 392825
  • Archival Resource Key: ark:/67531/metadc681833

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  • October 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Jan. 19, 2016, 6:52 p.m.

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Lara-Curzio, E.; Ferber, M.K. & Tortorelli, P.F. Interface oxidation and stress-rupture of Nicalon{trademark}/SiC CFCCs at intermediate temperatures, report, October 1, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc681833/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.