CMC-12: Fracture Toughness Tests on Carbon Fibers Notched by Focused Ion Beam(CMC-II: CERAMICS AND CERAMIC MATRIX COMPOSITE)

2005 ◽  
Vol 2005 (0) ◽  
pp. 38
Author(s):  
Y. KOGO ◽  
M. KOMORI
Keyword(s):  
Fracture Toughness ◽  
Carbon Fibers ◽  
Matrix Composite ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Ceramic Matrix Composite ◽  
Ceramic Matrix

Experiment Research for Fracture Toughness of PAN-Based Carbon Fibers

2011 ◽  
Vol 462-463 ◽  
pp. 1361-1366 ◽  
Author(s):  
Bo Ming Zhang ◽  
Yu Fen Wu
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Carbon Fibers ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Testing Machine ◽  
High Strength ◽  
Carbon Filaments ◽  
Fracture Theory ◽  
In Virtue Of

For the sake of the carbon filaments’ fracture toughness, using the focused ion beam (FIB) to etch the carbon fibers and got different tensile strength, and all specimens were stretched on an Instron-type filaments testing machine and got the samples’ tensile strength, The crack-to-mirror size ratio was assumed as a constant, In virtue of Griffith fracture theory, Fracture toughness (KΙC) of representative high-strength type PAN (polyacrylonitrile)-based carbon fibers, Torayca T300 and T800, were estimated to be 1MPam1/2 from the tensile strength vs. fracture mirror size relation.

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