Evaluation of the interfacial mechanical properties in fiber-reinforced ceramic composites

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The present study examined the application of a micro-indentation technique to the measurement of interfacial properties in fiber reinforced ceramic composites. Specific fiber/matrix systems included SiC/glass, SiC/macro-defect-free (MDF) cement, SiC/SiC, and mullite/glass. The effect of fiber coatings upon the interfacial properties was also investigated. These properties, which included the debond strength, interfacial shear stress, and residual axial fiber stress, were evaluated by measuring the force-displacement curves generated during load-unload cycles. Estimates of these three stress values were obtained by matching the experimental force-displacement curves with data predicted from an existing model. In general the SiC/glass composites exhibited the lowest values ... continued below

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40 p.

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Ferber, M. K.; Wereszczak, A. A.; Riester, L.; Lowden, R. A. & Chawla, K. K. June 1, 1993.

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Description

The present study examined the application of a micro-indentation technique to the measurement of interfacial properties in fiber reinforced ceramic composites. Specific fiber/matrix systems included SiC/glass, SiC/macro-defect-free (MDF) cement, SiC/SiC, and mullite/glass. The effect of fiber coatings upon the interfacial properties was also investigated. These properties, which included the debond strength, interfacial shear stress, and residual axial fiber stress, were evaluated by measuring the force-displacement curves generated during load-unload cycles. Estimates of these three stress values were obtained by matching the experimental force-displacement curves with data predicted from an existing model. In general the SiC/glass composites exhibited the lowest values of the interfacial shear and debond stresses. The sliding characteristics of the SiC/MDF cement and SiC/SiC composites were strongly influenced by the residual axial stress and the nature of the fiber coating. In the case of the mullite/glass composite, the high values of the interfacial shear and debond stresses reduced the measurement sensitivity, thereby increasing the uncertainty in the estimates of the interfacial properties. 17 refs, 6 figs, 1 tab.

Physical Description

40 p.

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OSTI; NTIS; GPO Dep.

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  • 17. annual conference on composites and advanced ceramics,Cocoa Beach, FL (United States),11-15 Jan 1993

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  • Other: DE93015494
  • Report No.: CONF-930164--10
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/10164658 | External Link
  • Office of Scientific & Technical Information Report Number: 10164658
  • Archival Resource Key: ark:/67531/metadc1389868

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  • June 1, 1993

Added to The UNT Digital Library

  • Nov. 28, 2018, 2:33 p.m.

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  • Dec. 12, 2018, 4:30 p.m.

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Ferber, M. K.; Wereszczak, A. A.; Riester, L.; Lowden, R. A. & Chawla, K. K. Evaluation of the interfacial mechanical properties in fiber-reinforced ceramic composites, report, June 1, 1993; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1389868/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.