Specimen Scale Effects on the Stress-Oxidation Behavior of a Carbon Fiber Reinforced Silicon Carbide Matrix Composite

Stress-rupture life and residual strength results obtained for a carbon fiber reinforced silicon carbide matrix composite are presented. The material used in this study had a chemical vapor infiltration silicon carbide matrix reinforced by T-300 carbon fibers in a two-dimensional woven cloth, with a plain weave architecture. Tests were conducted in a reduced oxygen environment of 1000 ppm O2/Ar at 1200 °C. The results from two sets of twenty creep rupture tests performed at a fixed stress are presented and discussed. In the first test set, specimens were run to failure. In the second set, rupture testing was interrupted after a fixed time interval and retained strengths were then measured. The results of this study reveal a simple deterministic relationship between the retained strength and residual life of the ceramic composite when exposed to the oxidative environment. Creep life was also observed to increase for specimens with wider tests section widths. Microstructural examination revealed damage mechanisms in the form of fiber oxidation and this points to the need for developing environmental models for predicting life of a component manufactured with this material.

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Dynamic tensile behavior of two-dimensional carbon fiber reinforced silicon carbide matrix composites

Materials Science and Engineering A ◽

10.1016/j.msea.2011.05.053 ◽

2011 ◽

Vol 528 (22-23) ◽

pp. 6998-7004 ◽

Cited By ~ 12

Author(s):

Chen Xuan ◽

Li Yulong

Keyword(s):

Silicon Carbide ◽

Carbon Fiber ◽

Tensile Behavior ◽

Matrix Composites ◽

Two Dimensional ◽

Fiber Reinforced ◽

Carbide Matrix ◽

Silicon Carbide Matrix ◽

Carbon Fiber Reinforced

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Preparation and friction behavior of carbon fiber reinforced silicon carbide matrix composites

Ceramics International ◽

10.1016/j.ceramint.2005.10.008 ◽

2007 ◽

Vol 33 (3) ◽

pp. 439-445 ◽

Cited By ~ 52

Author(s):

Yongdong Xu ◽

Yani Zhang ◽

Laifei Cheng ◽

Litong Zhang ◽

Jianjun Lou ◽

...

Keyword(s):

Silicon Carbide ◽

Carbon Fiber ◽

Matrix Composites ◽

Fiber Reinforced ◽

Friction Behavior ◽

Carbide Matrix ◽

Silicon Carbide Matrix ◽

Carbon Fiber Reinforced

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ZrC-Zr2Si Coating on Carbon Fiber Reinforced Silicon Carbide Matrix Composites Prepared by Pack Cementation Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.675-677.1225 ◽

2011 ◽

Vol 675-677 ◽

pp. 1225-1228

Author(s):

Yang Xiang ◽

Song Wang ◽

Zhao Hui Chen

Keyword(s):

Silicon Carbide ◽

Carbon Fiber ◽

Element Distribution ◽

Pack Cementation ◽

Matrix Composites ◽

Fiber Reinforced ◽

Carbide Matrix ◽

Silicon Carbide Matrix ◽

Carbon Fiber Reinforced ◽

Oxidation In Air

ZrC-Zr2Si coating was prepared on carbon fiber reinforced silicon carbide matrix composites (C/SiC) by pack cementation method to prevent these composites from oxidation. SEM, EDS and XRD were applied to analyze the surface and cross-section morphologies, element distribution and phase composition of the coating, respectively. The results show that the coating made by the technique exhibits excellent oxidation resistance. The optimizing infiltration composition and process was: 60wt.%Zr-Si, 30wt.%PCS-DVB, 10wt.%Al2O3, holding 8 hours at 1400°C in Ar protecting atmosphere, ZrC-Zr2Si coating is obtained, homogeneous and density. The weight loss percentage of the coated C/SiC is only 1.52％after oxidation in air at 1500°Cfor 30min.

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