scholarly journals Development of Orthogonal 3-D Woven Amorphous SiC Fiber / SiC/YSi2-Si Matrix Composites

2021 ◽  
Vol 70 (2) ◽  
pp. 86-92
Author(s):  
Shingo KANAZAWA ◽  
Naoki YAMAZAKI ◽  
Yuki ASAKURA ◽  
Keiji KUBUSHIRO ◽  
Takehiko ISHIKAWA ◽  
...  
Keyword(s):  
Matrix Composites ◽  
Sic Fiber ◽  
Amorphous Sic

Fabrication of Sic Matrix Composites by Liquid Phase Infiltration with a Polymeric Precursor

1994 ◽  
Vol 365 ◽  
Author(s):  
Leonard V. Interrante ◽  
C.W. Whitmarsh ◽  
W. Sherwood
Keyword(s):  
Weight Loss ◽  
Liquid Phase ◽  
Weight Change ◽  
Matrix Composites ◽  
Polymeric Precursor ◽  
Sic Fiber ◽  
Sic Whiskers ◽  
Amorphous Sic ◽  
Small Weight Loss ◽  
Better Than

ABSTRACTA process for the fabrication of SiC matrix composites has been developed which employs aliquid, highly branched, polycarbosilane (AHPCS). This polymer thermosets on heating at 200-400 °C (or at 100 °C with catalyst) and yields an amorphous SiC with low excess C and O content in 60-80% yield on pyrolysis to 1000 °C. Preforms consisting of C-coated Nicalon SiC fiber cloth, unidirectional Textron SiC SCS-6 fiber layups, or Mo boats packed with SiC whiskers, were infiltrated with the polymer, cured in an autoclave, and pyrolyzed to 1000 °C. Five to eight infiltration cycles gave net shape composites with final densities at 85-94 % of theoretical. The results of 4-point flexure tests on the as-prepared Nicalon composites indicate flexure strengths (aver. 378 MPa) that are comparable to or better than similarly reinforced CVI-SiC matrix composites. The whisker and SCS-6 composites showed a small weight loss (10-20%) on heating to 1500 °C in Ar and little or no weight change or obvious embrittlement in air at 1000 °C.

Deformation at interfaces of Ti-6Al-4V/SiC fiber composites

1992 ◽  
Vol 50 (1) ◽  
pp. 158-159
Author(s):  
Warren J. Moberly ◽  
Daniel B. Miracle ◽  
S. Krishnamurthy
Keyword(s):  
Thermal Stresses ◽  
Load Transfer ◽  
Coefficient Of Thermal Expansion ◽  
Hot Isostatic Pressing ◽  
Matrix Composites ◽  
Ongoing Research ◽  
Aerospace Applications ◽  
Sic Fiber ◽  
The Matrix ◽  
Intermetallic Matrix Composites

Titanium-aluminum alloy metal matrix composites (MMC) and Ti-Al intermetallic matrix composites (IMC), reinforced with continuous SCS6 SiC fibers are leading candidates for high temperature aerospace applications such as the National Aerospace Plane (NASP). The nature of deformation at fiber / matrix interfaces is characterized in this ongoing research. One major concern is the mismatch in coefficient of thermal expansion (CTE) between the Ti-based matrix and the SiC fiber. This can lead to thermal stresses upon cooling down from the temperature incurred during hot isostatic pressing (HIP), which are sufficient to cause yielding in the matrix, and/or lead to fatigue from the thermal cycling that will be incurred during application, A second concern is the load transfer, from fiber to matrix, that is required if/when fiber fracture occurs. In both cases the stresses in the matrix are most severe at the interlace.

Effect of C/SiC interphase on interfacial and mechanical properties of SiC fiber reinforced mullite matrix composites

2021 ◽  
Vol 98 (2) ◽  
pp. 335-341
Author(s):  
Guihang Deng ◽  
Xun Sun ◽  
Zhenghao Tian ◽  
Ru Jiang ◽  
Haitao Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Sic Fiber

Ablation behavior of SiC fiber/carbon matrix composites under simulated atmospheric reentry conditions

2011 ◽  
Vol 42 (3) ◽  
pp. 221-228 ◽  
Author(s):  
Toshio Ogasawara ◽  
Takuya Aoki ◽  
Mohamed Sayed Aly Hassan ◽  
Yosuke Mizokami ◽  
Naoyuki Watanabe
Keyword(s):  
Carbon Matrix ◽  
Matrix Composites ◽  
Atmospheric Reentry ◽  
Sic Fiber

scholarly journals Improved thermal stability of SiCf/SiC ceramic matrix composites fabricated by PIP process

2021 ◽  
Vol 15 (2) ◽  
pp. 164-169
Author(s):  
Jian Gu ◽  
Sea-Hoon Lee ◽  
Daejong Kim ◽  
Hee-Soo Lee ◽  
Jun-Seop Kim
Keyword(s):  
Thermal Stability ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Sic Fiber ◽  
Sic Ceramic ◽  
Different Temperatures ◽  
Pre Treatment ◽  
Thermal Deterioration ◽  
Thermal Stability Of

Improvement of the thermal stability of continuous SiC fiber reinforced SiC ceramic matrix composites (SiCf/SiC CMC) by the pre-treatment of SiC fillers and the suppression of oxidation during polymer impregnation and pyrolysis (PIP) process were investigated. Dense SiCf/SiC CMCs were fabricated using the slurry infiltration and PIP process under a purified argon atmosphere. Structure and mechanical properties of the SiCf/SiC CMC heated at different temperatures were evaluated. The flexural strength of the SiCf/SiC CMC decreased only 15.3%after heating at 1400 ?C, which exhibited a clear improvement compared with the literature data (49.5% loss), where severe thermal deterioration of SiCf/SiC composite occurred at high temperatures by the crystallization and decomposition of the precursor-derived ceramic matrix. The thermal stability of the SiCf/SiC CMC fabricated by PIP process was improved by the pre-treatment of SiC fillers for removing oxides and the strict atmosphere control to prevent oxidation.

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