scholarly journals Evaluation of Fiber/Matrix Interfacial Strength of Neutron Irradiated SiC/SiC Composites Using Hysteresis Loop Analysis of Tensile Test

2006 ◽  
Vol 47 (1) ◽  
pp. 207-210 ◽  
Author(s):  
Kazumi Ozawa ◽  
Tatsuya Hinoki ◽  
Takashi Nozawa ◽  
Yutai Katoh ◽  
Yuichi Maki ◽  
...  
Keyword(s):  
Tensile Test ◽  
Hysteresis Loop ◽  
Interfacial Strength ◽  
Loop Analysis ◽  
Fiber Matrix ◽  
Sic Composites

Stress-Strain Response in SiC/SiC Composites under Cyclic Loading

2007 ◽  
Vol 353-358 ◽  
pp. 1406-1409 ◽  
Author(s):  
Jun Ji Ohgi ◽  
S. Tanaka ◽  
T. Kuramoto ◽  
M. Suzuki ◽  
Koichi Goda
Keyword(s):  
Cyclic Loading ◽  
Interfacial Strength ◽  
Maximum Load ◽  
Tensile Tests ◽  
Fatigue Tests ◽  
Fracture Load ◽  
Stress Strain ◽  
Pull Out ◽  
Fiber Matrix ◽  
Sic Composites

The tension-tension fatigue tests for SiC/SiC composites were performed under the conditions that the maximum load Pmax was 80-90% to the fracture load of the tensile tests and the stress ratio was Rσ = 0.5. The composites exhibited a width in stress-strain hysteresis loop under one load cycling. In some cases the mean strain εmean gradually increase with increasing in number of cycles. These variations would reflect the developments of the fatigue damage at the fiber/matrix interface during the cyclic loading process. The pull-out lengths of the fibers for the fatigued- and not fatigued-specimens were measured through the SEM observations after the tensile test. In all materials, the average pull-out length of fibers in fatigued material was larger than in not fatigued material because the cyclic loading affected on the fiber/matrix interfacial strength.

scholarly journals Hydrothermal Corrosion Behaviors of Constituent Materials of SiC/SiC Composites for LWR Applications

Ceramics ◽  
2019 ◽  
Vol 2 (4) ◽  
pp. 602-611
Author(s):  
Shoko Suyama ◽  
Masaru Ukai ◽  
Megumi Akimoto ◽  
Toshiki Nishimura ◽  
Satoko Tajima
Keyword(s):  
Corrosion Resistance ◽  
Residual Strength ◽  
Pure Water ◽  
Operating Conditions ◽  
Raw Material ◽  
Stoichiometric Ratio ◽  
Sic Fibers ◽  
Corrosion Behaviors ◽  
Fiber Matrix ◽  
Sic Composites

The corrosion behaviors of SiC/SiC composite constituent materials in pure water at operating conditions, such as 300 °C and 8.5 MPa, were studied for potential application in accident-tolerant light water reactor (LWR) fuel cladding and core structures. Five kinds of SiC fibers, four kinds of SiC matrices, and three kinds of fiber/matrix interphase materials were examined in autoclaves. The potential constituent materials for future use in SiC/SiC composites were selected by considering corrosion rates and residual strength characteristics. The mass changes and the residual strength of each specimen were measured. SEM images of the surface layers were also inspected. The SiC fibers, regardless of their purity, crystallinity or stoichiometric ratio, decreased in strength due to the hydrothermal corrosion. For its part, the hydrothermal corrosion resistance of CVD-SiC, as a SiC matrix, was found to be affected by manufacturing conditions such as raw material gas type and synthesis temperature, as well as post-machining morphology. The CVD-carbon (CVD-C), as a fiber/matrix interphase material, showed good hydrothermal corrosion resistance. In order to protect the SiC fibers and the SiC matrices from hydrothermal corrosion, it would appear to be necessary to apply a dense CVD-C coating to both every fiber and the entire surface of the SiC matrices.

Tensile, Flexural, and Shear Properties of Neutron Irradiated SiC/SiC Composites with Different Fiber-Matrix Interfaces

2005 ◽  
Vol 2 (2) ◽  
pp. 12884 ◽  
Author(s):  
T Nozawa ◽  
K Ozawa ◽  
S Kondo ◽  
T Hinoki ◽  
Y Katoh ◽  
...  
Keyword(s):  
Shear Properties ◽  
Fiber Matrix ◽  
Sic Composites

430 Effect of Heat Treatment on Fiber-Matrix Interfacial Strength in C/C composites

2009 ◽  
Vol 2009.17 (0) ◽  
pp. _430-1_-_430-2_
Author(s):  
Yusuke WATANABE ◽  
Takuya YASUNO ◽  
Naomichi SAKAMOTO ◽  
Yasuo KOGO
Keyword(s):  
Heat Treatment ◽  
Interfacial Strength ◽  
Fiber Matrix

Oxidation-Protection Methodology for Long-Term use of Carbon-Carbon Fiber-Matrix Composites in Oxidizing Ambients

2002 ◽  
Vol 755 ◽  
Author(s):  
Ilan Golecki ◽  
Karen Fuentes ◽  
Terence Walker
Keyword(s):  
Carbon Fiber ◽  
Time Profile ◽  
Matrix Composites ◽  
Weight Changes ◽  
Carbon Foams ◽  
Fiber Matrix ◽  
Sic Composites ◽  
Multi Phase ◽  
Temperature Time

ABSTRACTA methodology is described for protecting Carbon-Carbon fiber-matrix composite (C-C) components from oxidation for extended use in oxidizing ambients for lifetimes of the order of 10,000 hours, from room temperature to 650°C. This time-temperature profile is relevant to applications such as airborne heat exchangers. Weight changes of oxidation-protected, pitch-fiber based C-C coupons in flowing dry air at 650°C are presented. Two types of external protective approaches are compared: (a) multi-phase, borophosphate-based fluidizing overseal coatings applied directly to C-C, and (b) the same overseal coatings applied to CVD SiOxCy coated C-C. The latter, dual-coating approach provides an effective engineering solution for the above temperature-time profile and is particularly applicable to thin (0.1–3 mm thick), complex-shaped articles. The behavior of inert substrates (oxidized silicon) with the same overseal coatings is compared to the behavior of the C-C substrates. This approach can be applied with optional modifications to suit other environmental conditions, and other carbon-containing materials, such as carbon foams and C-SiC composites.

Estimation of material properties using hysteresis loop analysis in friction stir welded steel plate

2020 ◽  
Vol 814 ◽  
pp. 152265 ◽  
Author(s):  
Avinash Ravi Raja ◽  
Meghanshu Vashista ◽  
Mohd Zaheer Khan Yusufzai
Keyword(s):  
Hysteresis Loop ◽  
Material Properties ◽  
Steel Plate ◽  
Loop Analysis ◽  
Welded Steel ◽  
Friction Stir

scholarly journals Effect of temperature on the fiber/matrix interfacial strength of carbon fiber reinforced polyamide model composites

2016 ◽  
Vol 3 (6) ◽  
pp. 16-00158-16-00158 ◽  
Author(s):  
Kazuto TANAKA ◽  
Nanako HOSOO ◽  
Tsutao KATAYAMA ◽  
Yuki NOGUCHI ◽  
Kazuhiro IZUI
Keyword(s):  
Carbon Fiber ◽  
Interfacial Strength ◽  
Effect Of Temperature ◽  
Fiber Reinforced ◽  
Fiber Matrix ◽  
Carbon Fiber Reinforced
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