Effect of high-temperature loading on mechanical properties of Nicalon fibers and Nicalon fiber/SiC matrix composites

Singh, D; Singh, J P

doi:10.2172/10116281

Title: Effect of high-temperature loading on mechanical properties of Nicalon fibers and Nicalon fiber/SiC matrix composites

Full Record
Other Related Research

Abstract

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.

Authors:: Singh, D; Singh, J P

Publication Date:: Fri Jan 01 00:00:00 EST 1993

Research Org.:: Argonne National Lab., IL (United States). Materials and Components Technology Div.

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 10123486

Report Number(s):: ANL/MCT/CP-76993; CONF-930164-3
ON: DE93006420

DOE Contract Number:: W-31109-ENG-38

Resource Type:: Conference

Resource Relation:: Conference: 17. annual conference on composites and advanced ceramics,Cocoa Beach, FL (United States),11-15 Jan 1993; Other Information: PBD: Jan 1993

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; SILICON CARBIDES; MECHANICAL PROPERTIES; REINFORCED MATERIALS; TEMPERATURE RANGE 1000-4000 K; COMPOSITE MATERIALS; TENSILE PROPERTIES; 360203

Citation Formats


                    Singh, D, and Singh, J P. Effect of high-temperature loading on mechanical properties of Nicalon fibers and Nicalon fiber/SiC matrix composites.  United States: N. p., 1993. 
        Web.  doi:10.2172/10116281.

Copy to clipboard


                    Singh, D, & Singh, J P. Effect of high-temperature loading on mechanical properties of Nicalon fibers and Nicalon fiber/SiC matrix composites.  United States.  https://doi.org/10.2172/10116281

Copy to clipboard


                    Singh, D, and Singh, J P. 1993.  
        "Effect of high-temperature loading on mechanical properties of Nicalon fibers and Nicalon fiber/SiC matrix composites".  United States.  https://doi.org/10.2172/10116281.  https://www.osti.gov/servlets/purl/10123486.

Copy to clipboard


                    
@article{osti_10123486,

  title        = {Effect of high-temperature loading on mechanical properties of Nicalon fibers and Nicalon fiber/SiC matrix composites},

  author       = {Singh, D and Singh, J P},

  abstractNote = {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.},

  doi          = {10.2172/10116281},

  url          = {https://www.osti.gov/biblio/10123486},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Jan 01 00:00:00 EST 1993},

  month        = {Fri Jan 01 00:00:00 EST 1993}

}

Copy to clipboard

Conference:

View Conference (0.99 MB)

https://doi.org/10.2172/10116281

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Effect of high-temperature loading on mechanical properties of Nicalon fibers and Nicalon fiber/SiC matrix composites

Conference Singh, D; Singh, J

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 weremore »« less
https://doi.org/10.2172/10116281

Full Text Available
The effect of processing on strength of Nicalon fibers in Nicalon fiber-SiC matrix composites

Conference Singh, D; Singh, J

Degradation of strength of Nicalon (silicon carbide) fibers during processing of Nicalon fiber-SiC matrix composites was studied. Strength distribution of as-fabricated Nicalon fibers was obtained via bundle tests. Whereas, strengths of fractured fibers in Nicalon fiber-reinforced SiC matrix composite specimens were estimated by measuring fracture mirror radii. Comparison of fracture probability plots indicate significant differences in the behavior of the as-fabricated fibers and those in the composite. Possible causes leading to these differences are discussed.
Full Text Available
The effect of processing on strength of Nicalon fibers in Nicalon fiber-SiC matrix composites

Conference Singh, D; Singh, J

Degradation of strength of Nicalon (silicon carbide) fibers during processing of Nicalon fiber-SiC matrix composites was studied. Strength distribution of as-fabricated Nicalon fibers was obtained via bundle tests. Whereas, strengths of fractured fibers in Nicalon fiber-reinforced SiC matrix composite specimens were estimated by measuring fracture mirror radii. Comparison of fracture probability plots indicate significant differences in the behavior of the as-fabricated fibers and those in the composite. Possible causes leading to these differences are discussed.
Full Text Available
Mechanical performance of Hi-Nicalon/CVI-SiC composites with multilayer SiC/C interfaces

Technical Report Halverson, H.; Carter, R.; Curtin, W.

The mechanical properties and interfacial characteristics of new SiC/SiC ceramic composites, composed of Hi-Nicalon fibers in a CVI-SiC matrix and having a variety of multilayer SiC/C coatings between the fibers and the matrix, are studied in detail to elucidate the roles of the coatings and fibers. Axial tension tests and unload/reload hysteresis loop measurements are performed to determine mechanical performance. All materials exhibit the strong and tough behavior characteristic of good ceramic composites, with all multilayer variants performing quite similarly. SEM microscopy demonstrates that matrix cracks penetrate through the multilayers and debond at the fiber/inner-coating interface. Analysis of the hystereticmore »« less
https://doi.org/10.2172/330672

Full Text Available
Mechanical behavior at 20 and 1200 C of Nicalon-silicon-carbide-fiber-reinforced alumina-matrix composites

Journal Article Celemin, J; Pastor, J; Llorca, J; ... - Journal of the American Ceramic Society

Tensile and fracture tests were conducted at 20 and 1,200 C on a ceramic-matrix composite that was composed of an alumina (Al{sub 2}O{sub 3}) matrix that was bidirectionally reinforced with 37 vol% silicon carbide (SiC) Nicalon fibers. The composite presented nonlinear behavior at both temperatures; however, the strength and toughness were significantly reduced at 1,200 C. In accordance with this behavior, matrix cracks were usually stopped or deflected at the fiber/matrix interface, and fiber pullout was observed on the fracture surfaces at 20 and 1,200 C. The interfacial sliding resistance at ambient and elevated temperatures was estimated from quantitative microscopymore »« less
https://doi.org/10.1111/j.1151-2916.1997.tb03159.x

Similar Records