Carbothermal synthesis of coatings on SiC fibers

2021 ◽  
Author(s):  
Linlin Chen
Keyword(s):  
Sic Fibers ◽  
Carbothermal Synthesis

Carbothermal Synthesis, Properties, and Structure of Ultrafine SiC Fibers

2020 ◽  
Vol 56 (1) ◽  
pp. 20-27
Author(s):  
A. S. Lebedev ◽  
A. V. Suzdal’tsev ◽  
V. N. Anfilogov ◽  
A. S. Farlenkov ◽  
N. M. Porotnikova ◽  
...  
Keyword(s):  
Sic Fibers ◽  
Carbothermal Synthesis ◽  
Synthesis Properties

TEM characterization of reaction zone in a SiC fiber-reinforced titanium alloy

1988 ◽  
Vol 46 ◽  
pp. 738-739
Author(s):  
G. Das ◽  
R. E. Omlor
Keyword(s):  
Titanium Alloys ◽  
Reaction Zone ◽  
Carbon Layer ◽  
Fiber Reinforced ◽  
Reaction Products ◽  
Sic Fibers ◽  
Sic Fiber ◽  
The Matrix ◽  
Immense Potential

Fiber reinforced titanium alloys hold immense potential for applications in the aerospace industry. However, chemical reaction between the fibers and the titanium alloys at fabrication temperatures leads to the formation of brittle reaction products which limits their development. In the present study, coated SiC fibers have been used to evaluate the effects of surface coating on the reaction zone in the SiC/IMI829 system.IMI829 (Ti-5.5A1-3.5Sn-3.0Zr-0.3Mo-1Nb-0.3Si), a near alpha alloy, in the form of PREP powder (-35 mesh), was used a茸 the matrix. CVD grown AVCO SCS-6 SiC fibers were used as discontinuous reinforcements. These fibers of 142μm diameter contained an overlayer with high Si/C ratio on top of an amorphous carbon layer, the thickness of the coating being ∽ 1μm. SCS-6 fibers, broken into ∽ 2mm lengths, were mixed with IMI829 powder (representing < 0.1vol%) and the mixture was consolidated by HIP'ing at 871°C/0. 28GPa/4h.

Microstructural, strength, and creep characterization of Sylramic™, Sylramic™-iBN and super Sylramic™-iBN SiC fibers

2021 ◽  
Vol 41 (9) ◽  
pp. 4697-4709
Author(s):  
R.T. Bhatt ◽  
F. Sola’ ◽  
L.J. Evans ◽  
R.B Rogers ◽  
D.F. Johnson
Keyword(s):  
Sic Fibers

scholarly journals Effects of SiC Fibers and Laminated Structure on Mechanical Properties of Ti–Al Laminated Composites

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1323
Author(s):  
Chenyang Hou ◽  
Shouyin Zhang ◽  
Zhijian Ma ◽  
Baiping Lu ◽  
Zhenjun Wang
Keyword(s):  
Volume Fraction ◽  
Raw Materials ◽  
Laminated Composites ◽  
Intermetallic Layer ◽  
Longitudinal Direction ◽  
Fracture Mechanisms ◽  
Compact Structure ◽  
Laminated Structure ◽  
Sic Fibers ◽  
Sic Fiber

Ti/Ti–Al and SiCf-reinforced Ti/Ti–Al laminated composites were fabricated through vacuum hot-pressure using pure Ti foils, pure Al foils and SiC fibers as raw materials. The effects of SiC fiber and a laminated structure on the properties of Ti–Al laminated composites were studied. A novel method of fiber weaving was implemented to arrange the SiC fibers, which can guarantee the equal spacing of the fibers without introducing other elements. Results showed that with a higher exerted pressure, a more compact structure with fewer Kirkendall holes can be obtained in SiCf-reinforced Ti/Ti–Al laminated composites. The tensile strength along the longitudinal direction of fibers was about 400 ± 10 MPa, which was 60% higher compared with the fabricated Ti/Ti–Al laminated composites with the same volume fraction (60%) of the Ti layer. An in situ tensile test was adopted to observe the deformation behavior and fracture mechanisms of the SiCf-reinforced Ti/Ti–Al laminated composites. Results showed that microcracks first occurred in the Ti–Al intermetallic layer.

Single-Step Carbothermal Synthesis of High-Purity MAX Phase Powders

2016 ◽  
Vol 99 (4) ◽  
pp. 1137-1140 ◽  
Author(s):  
Dylan T. Cuskelly ◽  
Erich H. Kisi
Keyword(s):  
High Purity ◽  
Single Step ◽  
Max Phase ◽  
Carbothermal Synthesis

Thermodynamic Analysis of the Carbothermal Synthesis of (U, Pu)N

2019 ◽  
Vol 61 (5) ◽  
pp. 535-540
Author(s):  
I. V. Peshkichev ◽  
A. A. Bochkareva ◽  
V. F. Kuropatenko ◽  
I. R. Makeyeva ◽  
O. V. Shults
Keyword(s):  
Thermodynamic Analysis ◽  
Carbothermal Synthesis

Processing, characterization and properties of novel gradient Si3N4/SiC fibers derived from polycarbosilanes

2019 ◽  
Vol 39 (13) ◽  
pp. 3613-3619 ◽  
Author(s):  
Xichao Dong ◽  
Changqing Guo ◽  
Xingyu Liu ◽  
Chong Gu ◽  
Pengfei Wu ◽  
...  
Keyword(s):  
Sic Fibers

Mesoscopic structure of SiC fibers by neutron and x-ray scattering

1996 ◽  
Vol 11 (5) ◽  
pp. 1169-1178 ◽  
Author(s):  
Kentaro Suzuya ◽  
Michihiro Furusaka ◽  
Noboru Watanabe ◽  
Makoto Osawa ◽  
Kiyohito Okamura ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Volume Fraction ◽  
X Rays ◽  
X Ray ◽  
Sic Fibers ◽  
X Ray Scattering ◽  
Mesoscopic Structure ◽  
Angle Scattering ◽  
Momentum Transfer Range ◽  
First Time

Mesoscopic structures of SiC fibers produced from polycarbosilane by different methods were studied by diffraction and small-angle scattering of neutrons and x-rays. Microvoids of a size of 4–10 Å in diameter have been observed for the first time by neutron scattering in a medium momentum transfer range (Q = 0.1–1.0 Å−1). The size and the volume fraction of β–SiC particles were determined for fibers prepared at different heat-treatment temperatures. The results show that wide-angle neutron scattering measurements are especially useful for the study of the mesoscopic structure of multicomponent materials.

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