Flexural properties of PAN- and pitch-based carbon fibers

Kimiyoshi Naito, Yoshihisa Tanaka, Jenn Ming Yang, Yutaka Kagawa

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)


The flexural properties of ultrahigh tensile strength polyacrylonitrile- based (T1000GB), ultrahigh modulus pitch-based (K13D), and high ductility pitch-based (XN-05) carbon fibers have been investigated using a three-point bending test at various span lengths ranging from 200 to 1500 μm. The flexural modulus and flexural strength of these carbon fibers were measured at room temperature. The fracture surfaces under bending were examined using a high-resolution scanning electron microscope to identify the origin of the failure. Statistical distributions of the flexural strength (maximum flexural stress at 200 μm span length) were then characterized. The Weibull modulus for the T1000GB, K13D, and XN-05 fibers were calculated to be 11.7, 11.8, and 11.7, which is higher than those obtained from the tensile test.

Original languageEnglish
Pages (from-to)186-192
Number of pages7
JournalJournal of the American Ceramic Society
Issue number1
Publication statusPublished - 2009 Jan
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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