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SYMPOSIA PAPER Published: 01 January 1999

STP14960S

New Perspectives on the Fracture of Nicalon Fibers

Source

Experimental studies have been conducted to examine the strength and fracture behavior of monofilament Nicalon™ SiC fibers ranging in diameter from 8 to 22 μm. The effects of varying fiber diameter, flaw location and flaw population on the tensile behavior of individual fibers were investigated using fractography. Results indicate that variations in fiber diameter influence the apparent fiber fracture toughness (K_1c), with higher K_1c values observed for decreasing fiber diameters. Observations also suggest that the location of the critical flaw may play a role in the fracture of Nicalon fibers. In addition to surface flaws, three distinct internal flaw populations are seen to cause fracture in Nicalon fibers.

Author Information

Taylor, ST

University of California, Berkeley, CA

Zhu, YT

Los Alamos National Laboratory, Los Alamos, NM

Blumenthal, WR

Los Alamos National Laboratory, Los Alamos, NM

Stout, MG

Los Alamos National Laboratory, Los Alamos, NM

Butt, DP

Los Alamos National Laboratory, Los Alamos, NM

Lowex, TC

Los Alamos National Laboratory, Los Alamos, NM

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Details

Developed by Committee: E08

Pages: 393–403

DOI: 10.1520/STP14960S

ISBN-EB: 978-0-8031-5396-7

ISBN-13: 978-0-8031-2486-8