Relevant bibliographies by topics / Si-B-C-N materials

Academic literature on the topic 'Si-B-C-N materials'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Si-B-C-N materials"

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Dang, Yanpei, Tianhao Li, Yangzhong Zhao, Liantai Duan, Jianning Zhang, Ke Chen, Liu He, Qing Huang, Chuanzhuang Zhao, and Yujie Song. "Polyborosilazanes with Controllable B/N Ratio for Si–B–C–N Ceramics." Materials 16, no. 3 (January 25, 2023): 1053. http://dx.doi.org/10.3390/ma16031053.

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Polyborosilazanes with controllable B/N ratio were synthesized using high-boron-content m-carborane, dichloromethylsilane, and hexamethydisilazane. After high-temperature pyrolysis, Si–B–C–N quaternary ceramics with SiC and B4C as the main phases were obtained. The B/N ratio in the precursors corresponded to the change in the feeding ratio of carborane and dichloromethylsilane. The effects of boron content and B/N ratio on the ceramic precursors and microphase structure in Si–B–C–N quaternary ceramics were explored in detail through a series of analytical characterization methods. A high boron content results in a significant increase in the ceramic yield (up to 71 wt%) of polyborosilazanes, and at the same time, the B/N molar ratio was regulated from 28.4:1 to 1.62:1. The appearance of the B4C structure in the Si–B–C–N quaternary ceramics through the regulation of the B/N ratio, has rarely been reported.
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Houška, J., J. Vlček, S. Hřeben, M. M. M. Bilek, and D. R. McKenzie. "Effect of B and the Si/C ratio on high-temperature stability of Si–B–C–N materials." Europhysics Letters (EPL) 76, no. 3 (November 2006): 512–18. http://dx.doi.org/10.1209/epl/i2006-10283-5.

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Smetyukhova, T. N., А. А. Barmin, L. E. Agureev, R. I. Rudshtein, I. N. Laptev, A. V. Ivanov, and B. S. Ivanov. "High-temperature corrosion-resistant ceramic composite materials based on (Si – B – C – N) system compounds (Review)." Perspektivnye Materialy 1 (2022): 5–21. http://dx.doi.org/10.30791/1028-978x-2022-1-5-21.

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Based on the analysis of domestic and foreign scientific publications, a systematization of data on the results achieved in the development of promising materials based on two-, three- and four-component compounds of the system (Si – B – C – N), such as nitrides, carbides, borides, silicon carbonitrides and boron, silicoboron carbonitride. Information about their structure, physical and thermomechenical properties and methods of sintering are given. The dependence of the properties of fibers, bulk and composite materials on the chemical composition and structure of Si – B – C – N-compounds is considered. The results of testing finished products at high temperatures in an oxidizing environment are presented. The prospects for the use of materials of the system (Si – B – C – N) in industry and technology for the manufacture of parts and assemblies intended for operation at high temperatures under mechanical loading in corrosive media are described.
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Schmidt, H., G. Borchardt, S. Weber, H. Scherrer, H. Baumann, A. Müller, and J. Bill. "Comparison of diffusion in amorphous Si–C–N and Si–B–C–N precursor-derived ceramics." Journal of Non-Crystalline Solids 298, no. 2-3 (March 2002): 232–40. http://dx.doi.org/10.1016/s0022-3093(01)01055-9.

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Butchereit, Elke, Klaus G. Nickel, and Anita Müller. "Precursor-Derived Si-B-C-N Ceramics: Oxidation Kinetics." Journal of the American Ceramic Society 84, no. 10 (December 20, 2004): 2184–88. http://dx.doi.org/10.1111/j.1151-2916.2001.tb00985.x.

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Kumar, Ravi, G. Rixecker, and F. Aldinger. "Anelasticity of precursor derived Si–B–C–N ceramics." Journal of the European Ceramic Society 27, no. 2-3 (January 2007): 1475–80. http://dx.doi.org/10.1016/j.jeurceramsoc.2006.04.023.

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Houska, Jiri. "Maximum Achievable N Content in Atom-by-Atom Growth of Amorphous Si-B-C-N Materials." Materials 14, no. 19 (October 1, 2021): 5744. http://dx.doi.org/10.3390/ma14195744.

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Amorphous Si-B-C-N alloys can combine exceptional oxidation resistance up to 1500 °C with high-temperature stability of superior functional properties. Because some of these characteristics require as high N content as possible, the maximum achievable N content in amorphous Si-B-C-N is examined by combining extensive ab initio molecular dynamics simulations with experimental data. The N content is limited by the formation of unbonded N2 molecules, which depends on the composition (most intensive in C rich materials, medium in B rich materials, least intensive in Si-rich materials) and on the density (increasing N2 formation with decreasing packing factor when the latter is below 0.28, at a higher slope of this increase at lower B content). The maximum content of N bonded in amorphous Si-B-C-N networks of lowest-energy densities is in the range from 34% to 57% (materials which can be grown without unbonded N2) or at most from 42% to 57% (at a cost of affecting materials characteristics by unbonded N2). The results are important for understanding the experimentally reported nitrogen contents, design of stable amorphous nitrides with optimized properties and pathways for their preparation, and identification of what is or is not possible to achieve in this field.
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Baldus, H. P., Martin Jansen, and O. Wagner. "New Materials in the System Si-(N,C)-B and Their Characterization." Key Engineering Materials 89-91 (August 1993): 75–80. http://dx.doi.org/10.4028/www.scientific.net/kem.89-91.75.

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Golczewski, Jerzy A., and Fritz Aldinger. "Phase separation in Si–(B)–C–N polymer-derived ceramics." International Journal of Materials Research 97, no. 2 (February 1, 2006): 114–18. http://dx.doi.org/10.1515/ijmr-2006-0020.

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Abstract Details of phase separation in the microstructure of amorphous Si – (B) –C–N ceramics derived from polymers have been resolved using the recent results of structural investigations. The formation of an amorphous phase built of atomic compounds SiC i /4N(4 – i)/3 and consequently located along the composition line between SiC and Si3N4 in the ternary Si–C–N phase diagram demonstrates a generic feature of phase separation in all these materials. The amorphous carbon phase separates as a counterpart in the micro-structure of Si –C–N ceramics, and in the case of Si –B– C–N ceramics such counterpart represents B–N–C domains of the composition (BN) c C y located along the tie line C–BN in the ternary B–C–N phase diagram. The effect of phase separation has been also pondered as a source of exceptional material properties.
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Jäschke, T., and M. Jansen. "Improved durability of Si/B/N/C random inorganic networks." Journal of the European Ceramic Society 25, no. 2-3 (January 2005): 211–20. http://dx.doi.org/10.1016/j.jeurceramsoc.2004.08.002.

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Dissertations / Theses on the topic "Si-B-C-N materials"

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Houska, Jiri. "New quaternary amorphous materials Si-B-C-N: reactive magnetron sputtering and an ab-initio study." Science, School of Physics, 2007. http://hdl.handle.net/2123/1542.

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Doctor of Philosophy
First part of the thesis is focused on experimental preparation of new hard quaternary amorphous materials Si-B-C-N with high thermal stability. Materials were prepared in the form of thin films using reactive magnetron sputtering. The technique used proved to be suitable for reproducible synthesis of these materials. The Si-B-C-N films were generally found to be amorphous with low compressive stress and good adhesion to silicon or glass substrates. The process and film characteristics were controlled by varying the sputter target composition, the Ar fraction in the N2–Ar gas mixture, the negative rf-induced substrate bias, and the substrate temperature. Main conclusions describe the relationships between process parameters, discharge and deposition characteristics and film properties (elemental composition, chemical bonding structure, material hardness, compressive stress or electrical conductivity of materials prepared). Second part of the thesis is focused on ab-initio simulations of structures of experimentally prepared Si-B-C-N materials. In the performed liquid-quench simulations, the Kohn-Sham equations for the valence electrons are expanded in a basis of plane wave functions, while core electrons were represented using Goedecker-type pseudopotentials. We simplified the ion bombardment process by assuming that the primary impact creates a localized molten region of high temperature and sufficiently short cooling time, commonly referred to as a thermal spike. Main conclusions deal with N2 formation in studied materials, effect of implanted Ar on structure and properties of prepared materials, ability of Si to relieve that part of compressive stress which is caused by implanted Ar, and ability of B to improve thermal stability of Si-B-C-N materials. The calculated results are compared with experiment.
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Houska, Jiri. "New quaternary amorphous materials Si-B-C-N: reactive magnetron sputtering and an ab-initio study." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1542.

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First part of the thesis is focused on experimental preparation of new hard quaternary amorphous materials Si-B-C-N with high thermal stability. Materials were prepared in the form of thin films using reactive magnetron sputtering. The technique used proved to be suitable for reproducible synthesis of these materials. The Si-B-C-N films were generally found to be amorphous with low compressive stress and good adhesion to silicon or glass substrates. The process and film characteristics were controlled by varying the sputter target composition, the Ar fraction in the N2–Ar gas mixture, the negative rf-induced substrate bias, and the substrate temperature. Main conclusions describe the relationships between process parameters, discharge and deposition characteristics and film properties (elemental composition, chemical bonding structure, material hardness, compressive stress or electrical conductivity of materials prepared). Second part of the thesis is focused on ab-initio simulations of structures of experimentally prepared Si-B-C-N materials. In the performed liquid-quench simulations, the Kohn-Sham equations for the valence electrons are expanded in a basis of plane wave functions, while core electrons were represented using Goedecker-type pseudopotentials. We simplified the ion bombardment process by assuming that the primary impact creates a localized molten region of high temperature and sufficiently short cooling time, commonly referred to as a thermal spike. Main conclusions deal with N2 formation in studied materials, effect of implanted Ar on structure and properties of prepared materials, ability of Si to relieve that part of compressive stress which is caused by implanted Ar, and ability of B to improve thermal stability of Si-B-C-N materials. The calculated results are compared with experiment.
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Zhuang, Chunqiang [Verfasser]. "Theoretical investigation and experimental confirmation of crystalline and amorphous Si, B, C, N–based hard materials / Chunqiang Zhuang." Siegen : Universitätsbibliothek der Universität Siegen, 2013. http://d-nb.info/1038845424/34.

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Reichle, Klaus Jürgen. "Thermische Entwicklung atomarer freier Volumen und Kristallisation in Si-(B)-C-N-Precursor-Keramiken." [S.l. : s.n.], 2003. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10720631.

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Book chapters on the topic "Si-B-C-N materials"

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Yang, Zhi Hua, Yu Zhou, De Chang Jia, Chang Qing Yu, Qing Chang Meng, and Jia Hu Ouyang. "Preparation of Amorphous Si-B-C-N Powders and Nano-Sized Ceramics." In Key Engineering Materials, 1218–20. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.1218.

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Oscroft, R. J., and D. P. Thompson. "High-Temperature Reactions in the B-Al-Si-N-C System." In 4th International Symposium on Ceramic Materials and Components for Engines, 172–79. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2882-7_12.

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Yang, Zhi Hua, Yu Zhou, De Chang Jia, Qing Chang Meng, and Chang Qing Yu. "BBPPAmorphous Si-B-C-N Ceramics Fabricated by High Energy Ball Milling and Hot Pressing." In Key Engineering Materials, 1505–8. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.1505.

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Conference papers on the topic "Si-B-C-N materials"

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Ioka, Ikuo, Jun Suzuki, Kiyoshi Kiuchi, and Jumpei Nakayama. "Application of Extra High Purity Austenitic Stainless Steel to Weld Overlay." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-30197.

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Stress Corrosion Cracking (SCC) was understood to be the result of a combination of susceptible material, a corrosive environment and tensile stress above a threshold. An Extra High Purity Fe-Cr-Ni austenitic stainless steel (EHP alloy) was developed with conducting the new multiple refined melting technique in order to suppress the total impurities (C, O, N, P, S, B, Si, Mn) less than 100ppm. EHP alloy has great intergranular corrosion resistance. It is considered that intergranular corrosion becomes initiation of SCC. So, we try to apply EHP alloy to weld overlay materials to prevent from occurring SCC. EHP alloy (Fe-25Cr-20Ni, Fe-25Cr-35Ni) was melted by the new technique. The conventional weld metals (Type Y316L and Inconel 82) were also prepared as comparisons. Specimens were machined from the welded metal of each material. Intergranular corrosion tests were performed in boiling 8kmol/m3 HNO3 solutions containing 1kg/m3 Cr(VI) ions. The intergranular corrosion of conventional weld metals was severer than those of EHP alloys. Crevice Beam Bending tests to evaluate susceptibility of SCC were carried out in high temperature water of 561K with saturated oxygen (32ppm) for 1000h. Though cracks and intergranular corrosion were observed in all specimens, cracks of conventional weld metals were much more than those of EHP alloys. It was confirmed that EHP alloy has also excellent SCC resistance as a weld overlay material.
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Mukherjee, R., W. M. Mook, J. Hafiz, X. Wang, W. W. Gerberich, J. V. R. Heberlein, P. H. McMurry, and S. L. Girshick. "Synthesis of Nanocomposites by Ballistic Impaction of Nanoparticles." In ASME 4th Integrated Nanosystems Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/nano2005-87036.

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We are investigating ballistic impact assembly of nanoparticles to form a new class of materials for superhard coatings and micromolded MEMS parts. Nanoparticles are generated by dissociating vapor-phase reactants injected downstream of a thermal plasma and expanding the resultant flow through a converging nozzle into a low-pressure chamber. The nanoparticle-laden gases achieve hypersonic velocities due to the pressure difference between the reaction region (450 torr) and the low-pressure chamber (∼2 torr). Particles are deposited by one of two processes: (a) by placing a substrate 20mm downstream of the flow, which results in a bow shock at the substrate and high impact velocities (calculated to be over 2000 m/s for a 20 nm SiC particle): termed as high-rate deposition, (b) by focusing the particles into a tight beam (width of ∼35 (μm) using aerodynamic lenses, and subsequent impaction on a translating substrate: termed as focused beam deposition. Thus far, nanoparticle deposits consisting of combinations of Si, Ti, C and N have been explored.
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"O-045 - INTERVENCIÓN GRUPAL DIRIGIDA A LA MEJORA DE LA FUNCIONALIDAD EN EL DOMICILIO, CON O SIN ATENCIÓN DOMICILIARIA INDIVIDUAL, DIRIGIDA A PACIENTES VINCULADOS A DISPOSITIVOS DE SALUD MENTAL Y ADICCIONES." In 24 CONGRESO DE LA SOCIEDAD ESPAÑOLA DE PATOLOGÍA DUAL. SEPD, 2022. http://dx.doi.org/10.17579/abstractbooksepd2022.o045.

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Objetivos: Los Servicios de Rehabilitación Comunitaria (SRC) atienden a pacientes que, como consecuencia de la evolución de su psicopatología y/o trastornos adictivos, presentan carencias que dificultan el desarrollo de roles normalizados y requieren del soporte especializado para su recuperación y mantenimiento en el núcleo de convivencia natural. El presente estudio tiene como objetivo determinar si la intervención grupal de apoyo al domicilio, con o sin atención domiciliaria individual, ayuda a: a) promover competencias instrumentales en el hogar b) potenciar implicación de la persona en asumir un rol activo en el área doméstica, c) adquirir conocimientos sobre la funcionalidad en el domicilio. Material y Método: Comparativa de medidas pre y post de pacientes, N=40, de la intervención grupal llevada a cabo durante 18 meses. Pacientes vinculados a SRC, CSMA, CASD. Se han realizado dos ediciones de la intervención grupal, de 9 meses de duración cada una, frecuencia semanal, grupo semiabierto. Medidas pre: Evaluación del área de habilidades domésticas de la escala BELS (Basic Everyday Living Schedule). Medidas post: Evaluación del área de habilidades domésticas (escala BELS), índice de adherencia al programa psicoeducativo y conocimientos adquiridos. De los 40 pacientes que han recibido la intervención grupal (tratamiento habitual), 10 de ellos han recibido además sesiones de atención en su entorno habitual-domicilio. Resultados: Mejora significativa en área de habilidades domésticas medidas por la escala BELS. Los usuarios que recibieron tratamiento habitual + intervención individual muestran un mayor conocimiento sobre la importancia de la funcionalidad en el domicilio para poder continuar viviendo de forma autónoma. Conclusión: El área de autonomía y funcionalidad es una de las más afectadas en aquellas personas que sufren un problema de salud mental y adicciones. Una intervención específica centrada en las habilidades necesarias para vivir de forma autónoma e independiente se ha mostrado exitosa y necesaria para estas personas.
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Reports on the topic "Si-B-C-N materials"

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Riedel, Ralf, and James W. McCauley. Report of Research at Technische Universitaet Darmstadt on Ultrahard Materials in the B-C-N-Si System. Fort Belvoir, VA: Defense Technical Information Center, June 2015. http://dx.doi.org/10.21236/ada623862.

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