Manufacturing and Properties of CMCs Containing Ti Filler with Improved Intra-Matrix Bond

2006 ◽  
Vol 50 ◽  
pp. 83-90
Author(s):  
G. Stantschev ◽  
Martin Friess ◽  
Walter Krenkel
Keyword(s):  
Mechanical Properties ◽  
Manufacturing Process ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Novel Approach ◽  
Polymer Infiltration

Ceramic matrix composites (CMCs) were manufactured via polymer infiltration and pyrolysis) PIP process. In order to improve the performance of CMCs as well as to accelerate the manufacturing process, micro-sized powders of Ti are employed as active fillers. To further increase mechanical properties of the CMC, a novel approach is made to strengthen intra-matrix bond by treating the CMC with titanium(IV)-diisopropylate after first PIP processing prior to each PIP cycle.

scholarly journals Mechanical Properties and Failure Behavior of 3D-SiCf/SiC Composites with Different Interphases

Scanning ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Deng-hao Ma ◽  
En-ze Jin ◽  
Jun-ping Li ◽  
Zhen-hua Hou ◽  
Jian Yin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Shear Strength ◽  
Ceramic Matrix Composites ◽  
Failure Behavior ◽  
Matrix Composites ◽  
Static Mechanical ◽  
Sic Composites ◽  
Polymer Infiltration ◽  
Static Mechanical Properties

Continuous silicon carbide fiber-reinforced silicon carbide ceramic matrix composites (SiCf/SiC) are promising as thermal structural materials. In this work, the microstructure and static mechanical properties of 3D-SiCf/SiC with PyC, SiC, and PyC/SiC and without an interface prepared via polymer infiltration and pyrolysis (PIP) were investigated systematically in this paper. The results show that the microstructure and static mechanical properties of SiCf/SiC with an interphase layer were superior to the composites without an interlayer, and the interface debondings are existing in the composite without an interphase, resulting in a weak interface bonding. When the interphase is introduced, the interfacial shear strength is improved, the crack can be deflected, and the fracture energy can be absorbed. Meanwhile, the shear strength of the composites with PyC and PyC/SiC interfaces was 118 MPa and 124 MPa, respectively, and showing little difference in bending properties. This indicates that the sublayer SiC of the PyC/SiC multilayer interface limits the binding state and the plastic deformation of PyC interphase, and it is helpful to improve the mechanical properties of SiCf/SiC.

Fabrication, microstructure, and mechanical properties of TaC particulate and SiC fiber-reinforced lithia-alumina-silica composites

1995 ◽  
Vol 10 (3) ◽  
pp. 602-608 ◽  
Author(s):  
Hyun-Ho Shin ◽  
Randolph Kirchain ◽  
Robert F. Speyer
Keyword(s):  
Mechanical Properties ◽  
Glass Ceramic ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Particulate Reinforcement ◽  
Sic Fiber ◽  
Reinforced Composite ◽  
Ceramic Route ◽  
Particulate Reinforced

Additions of O to 9 mol % Ta2O5 to a lithia-alumina-silica glass-ceramic matrix Nicalon SiC-reinforced composite increased the elastic modulus and ultimate strength of the composite. The additive fostered sphereulitic growth of β-eucriptite solid solution crystals which concentrated Ta2O5 at sphereulite boundaries and adjacent to the fiber-matrix carbon-rich interphases. These regions reacted with the interphases as well as soluble carbon monoxide gas to convert them to TaC. The former reaction was shown to be thermodynamically favorable above 983 °C, while the latter was favorable above 1249 °C. The improvement in mechanical properties was attributed to TaC particulate reinforcement, and suggests a simple glass-ceramic route to the fabrication of particulate-reinforced ceramic matrix composites.

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