Design of Room Temperature Tensile Test Specimen Made of Ceramic Matrix Composites

1998 ◽  
Vol 164-165 ◽  
pp. 257-260 ◽  
Author(s):  
Jian Lin Shi ◽  
L. Brady ◽  
A. Ireson
Keyword(s):  
Tensile Test ◽  
Test Specimen ◽  
Room Temperature ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Tensile Test Specimen ◽  
Room Temperature Tensile Test

Dynamic Mechanical Properties of 2D-C/SiC and 2D-SiC/SiC

2019 ◽  
Vol 956 ◽  
pp. 244-252
Author(s):  
Xiao Ju Gao ◽  
Chao Li ◽  
Hasigaowa ◽  
Zhi Peng Li ◽  
Yu Guang Bao ◽  
...  
Keyword(s):  
Strain Rate ◽  
Room Temperature ◽  
Ceramic Matrix Composites ◽  
Rate Sensitivity ◽  
Ceramic Matrix ◽  
Dynamic Mechanical Properties ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Mechanical Behaviors ◽  
Sic Composites

The quasi-static and dynamic compressive mechanical behaviors of two kinds of fiber reinforced SiC-matrix composites including 2D-C/SiC and 2D-SiC/SiC were investigated. Their compressive behaviors of materials at room temperature and strain rate from 10-4 to 104 /s were studied. The fracture surfaces and damage morphology were observed by scanning electron microscopy (SEM). The results showed that the dynamic failure strengths of the two kinds of fiber reinforced SiC-matrix composites obey the Weibull distribution. The Weibull modulus of the two materials were 13.70 (2D-C/SiC) and 5.66 (2D-SiC/SiC), respectively. It was found that the two kinds of fiber reinforced ceramic matrix composites presented a transition from brittle to tough with the decrease of strain rate. The 2D-SiC/SiC materials demonstrated a more HYPERLINK "http://dict.cnki.net/dict_result.aspx?searchword=%e6%98%be%e8%91%97%e7%9a%84&tjType=sentence&style=&t=remarkable"significant strain rate sensitivity and smoother fracture surface compared to the 2D-C/SiC composites, implying that the former composites present brittle features. This was because the SiC/SiC composites possessed high bonding strength in interface of fiber/fiber and fiber/matrix is very strong.

Tensile Behavior of 2.5D C/SiCN Composites

2012 ◽  
Vol 217-219 ◽  
pp. 67-70
Author(s):  
Yi Xia ◽  
Hong Fang Li
Keyword(s):  
Tensile Stress ◽  
Room Temperature ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Tensile Behavior ◽  
Matrix Composites ◽  
Stress Growth ◽  
C Fiber ◽  
Cracks Propagation ◽  
Thermal Stress Relaxation

Tensile behavior of C fiber reinforced amorphous SiCN ceramic matrix composites (C/SiCN ) were investigated by tensile machine. The microstructure morphologies were observed by scanning electron microscope. The results indicate that the tensile stress-strain curves of C/SiCN composites dispaly typical elastic deformation and cracks propagation stages. The 1500°C pre-sabilization treatment of C/SiCN in vacuum facilitates room temperature tensile stress growth. The higher treated temperature such as 1900°C is yet opposite. The reasons were attributed to thermal stress relaxation of C/SiCN after pre-stabilization treatment in vacuum.

Micromechanical life prediction method of fiber-reinforced ceramic-matrix composites subjected to stochastic overloading at room temperature

2021 ◽  
pp. 146442072110085
Author(s):  
Longbiao Li
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Room Temperature ◽  
Degradation Rate ◽  
Prediction Method ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Damage Models

In this paper, a micromechanical fatigue life prediction method for fiber-reinforced ceramic-matrix composites subjected to stochastic overloading at room temperature is developed. Fatigue damage mechanisms in the matrix, interfaces, and fibers are characterized using different damage models. Relationships between the fatigue life and related degradation rate, stochastic overloading stress, and breakage of intact fibers are established. Experimental fatigue life of different C/SiC composites subjected to different stochastic overloading is predicted. For the same stochastic overloading condition, the degradation rate of fatigue life is the highest for cross-ply C/SiC composite, and the lowest for 2.5D C/SiC composite.

Room-Temperature Mechanical Behavior of Fiber-Reinforced Ceramic-Matrix Composites

1985 ◽  
Vol 68 (1) ◽  
pp. C-27-C-30 ◽  
Author(s):  
T. Mah ◽  
M. G. Mendiratta ◽  
A. P. Katz ◽  
R. Ruh ◽  
K. S. Mazdiyasni
Keyword(s):  
Mechanical Behavior ◽  
Room Temperature ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Fiber Reinforced

Effects of Different Solid Lubricants on Mechanical and Tribological Properties of Al2O3/ZrO2 Nanocomposites

2010 ◽  
Vol 658 ◽  
pp. 404-407 ◽  
Author(s):  
Seung Ho Kim ◽  
Sung Hun Cho ◽  
Simo Pekka Hannula ◽  
Soo Wohn Lee
Keyword(s):  
Room Temperature ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Solid Lubricants ◽  
The Self ◽  
Matrix Composites ◽  
Mechanical And Tribological Properties ◽  
Plasma Sintering ◽  
The Coefficient Of Friction ◽  
Spark Plasma

Solid lubricants were suited for the applications of high temperature parts. Recently, researches for self-lubricating ceramic matrix composites using solid lubricants, such as MoS2, WS2, h-BN, and graphite etc., became active. This work is to use the spark plasma sintering (SPS) technique in order to make self-lubricating Al2O3/15wt% ZrO2 nanocomposites with higher mechanical properties. To optimize the self-lubricating Al2O3/15wt% ZrO2 nanocomposite systems were added with different solid lubricants (CaF2, BaF2, MoS2, WS2, h-BN, and graphite). The coefficient of friction of CaF2, h-BN and graphite added composites in steady-state at room temperature are below 0.3.

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