Results 71 to 80 of about 104 (98)
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High-temperature flexural properties of SiBC modified C/SiC composites
Ceramics International, 2014Abstract In the present paper, high-temperature flexural properties of the SiBC modified C/SiC composites were investigated via the four-point bending method. The flexural strength and elastic modulus of the composites tested at 25 °C, 800 °C and 1200 °C were 276 MPa, 377 MPa, 440 MPa, and 78 GPa, 183 GPa, 189 GPa, respectively.
Xiaoyu Cao +6 more
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Microstructure and morphology of SiCf-SiBC composites
The European Physical Journal Applied Physics, 2001This paper deals with the study of a new generation of ceramic matrix composites, SiC f -SiBC, which consists of a 2.5D perform of SiC fibers and of a self sealing multilayered matrix. Three different batches of these CMCs have been investigated in a morphological point of view thanks to the observations performed at the mesoscopic scale by scanning ...
S. Darzens, J. Vicens, J. L. Chermant
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Imperfect EM Shielding by Thin Conducting Sheets with PEC and SIBC
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG), 2019Electromagnetic compatibility of electronic based systems is increasingly gaining importance. The aim is to develop simulation tools based on the finite element method, which allow the inclusion of electromagnetic compatibility aspects of electronic based systems.
M. Leumuller +4 more
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In-plane thermal expansion behavior of dense ceramic matrix composites containing SiBC matrix
Journal of the European Ceramic Society, 2020Abstract In order to reveal the effect of matrix cracks resulted from thermal residual stresses (TRS) on the thermal expansion behavior of ceramic matrix composites, SiBC matrix was introduced into Cf/SiC and SiCf/SiC by liquid silicon infiltration.
Xiaomeng Fan +6 more
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Invariant BEM-SIBC formulations for time- and frequency-domain eddy current problems
IEEE Transactions on Magnetics, 2000We demonstrate that frequency- and time-domain boundary integral equation formulations involving the surface impedance boundary conditions (SIBCs) can be transformed to invariant forms that depend only on the geometry of the problem and do not contain temporary parameters of the field. Thus the integral equations have to be solved only once for a given
S. Yuferev, N. Ida, L. Kettunen
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Ceramics International, 2015
Abstract A series of SiBC matrix modified C/SiC composites (C/SiC–SiBC) with different pyrolytic carbon (PyC) interphase thicknesses (50–300 nm) were fabricated by a joint process of chemical vapor infiltration, slurry infiltration and liquid silicon infiltration.
Xiaoyu Cao +5 more
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Abstract A series of SiBC matrix modified C/SiC composites (C/SiC–SiBC) with different pyrolytic carbon (PyC) interphase thicknesses (50–300 nm) were fabricated by a joint process of chemical vapor infiltration, slurry infiltration and liquid silicon infiltration.
Xiaoyu Cao +5 more
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EFFECT OF OXIDATION ON MODULUS OF 2D-C/SiBC COMPOSITES
Modern Physics Letters B, 2010The effects of oxidation on the weight change (DW) and modulus change (DE) of an uncoated C / SiBC were investigated in 600–1000°C. The results show that larger DW does not mean larger damage. DE is more sensitive to the oxidation process than DW. At lower temperatures, a small DW can result in a large DE.
CHENGYU ZHANG +4 more
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Oxidation behaviour of a multi-layered ceramic-matrix composite (SiC)f/C/(SiBC)m
Composites Science and Technology, 2001Abstract The oxidation behaviour of a 2.5D multi-layered ceramic-matrix composite (SiC)f/C/(SiBC)m was investigated in a dry atmosphere O2 (20 vol.%) CO2 (5 vol.%) He and in the presence of water vapour H2O (2.3 vol.%). The matrix denoted (SiBC)m is constituted of three phases: silicon carbide, boron carbide and a SiBC phase.
J.P Viricelle +2 more
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Efficient Analysis of Electromagnetic Fields near Lightning Channel by Using SIBC in FDTD
2009 20th International Zurich Symposium on Electromagnetic Compatibility, 2009This paper presents an efficient finite difference time domain (FDTD) algorithm to calculate the transient electromagnetic fields above conductive ground near lightning channel. Significant computational time and memory savings are achieved by using surface impedance boundary condition (SIBC) to avoid simulating the underground region.
Jie Liu +4 more
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A novel algorithm of high order SIBC for the FDTD
IEEE Antennas and Propagation Society Symposium, 2004., 2004The technique of surface impedance boundary condition (SIBC) can avoid calculating the fields inside conductor and the results have been proved valid under certain conditions. More recently, some authors studied the surface impedance of a lossy dielectric with exponential approximation (J.G. Maloney and G.S. Smith, IEEE Trans.
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