New class of funCtionAl silicon caRBOnitride-based ceramic FIBErs from oRganometal compound-modified polySilazanes

由有机金属化合物改性聚硅氮烷制成的新型功能碳氮化硅基陶瓷纤维

• 批准号: 284004736
• 负责人: Dr. Günter Motz
• 金额: --
• 依托单位: Lehrstuhl für Keramische Werkstoffe
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/284004736?language=en
• 关键词: New; class; funCtionAl; silicon; caRBOnitride

Non-oxide ceramic fibers have been widely used for the reinforcement of ceramic matrix composites (CMCs). Despite considerable efforts to develop new non-oxide ceramic fibers in the last few years, their use at industrial level exclusively concern silicon carbide (SiC) fibers. But SiC fibers are very expensive (from 1.5 to 10 kEuro/kg) depending on the quality of the fibers, mainly because the production is dominated by companies from Japan with no alternative products from other countries. To reduce the costs of the fibers and to be competitive on this topic, a mobilization of activities and resources of the academic European researchers, especially from France and Germany, is proposed in the present project. This project concerns the design, processing and investigation of the properties of a new class of cost-effective polymer derived non-oxide ceramic fibers with additional functional properties. The proposed materials are expected to be used as reinforcement for thermostructural applications with electrical and magnetic properties. To meet the requirements for the applications mentioned above the obtained fibers need to combine durability in aggressive and harsh environments while achieving functional properties, such as electrical conductivity and magnetic properties. These properties can be achieved through the modification of (Si-(B/Al)-C-N) polymers with metal-organic compounds, leading to the in-situ growth of the functional nanophase simultaneously with the formation of the respective ceramic SiCN(B/Al) matrix during pyrolysis. To reach our objectives, the project is divided into five interconnected scientific tasks. The first task (Ta1) is focused on the synthesis and characterization (through NMR, FTIR, molecular weight measurements and elemental analyses) of the metal-modified preceramic polymers. The second task (Ta2) deals with the melt-spinning and curing of the polymer fibers, as the optimization of the spinning process by means of rheological investigation of the synthesized preceramic polymers. Task 3 (Ta3) is focused on the conversion of the cured polymer fibers prepared in Ta2 into the desired metal containing functionalized ceramic fibers. Detailed investigation of the polymer-to-ceramic conversion will be achieved through FTIR, TG-GC/MS and solid-state NMR. Task 4 (Ta4) is dedicated to the characterization of ceramic fibers, concerning the mechanical and (nano)structural properties and the functionalities of the metal-containing SiCN(B/Al) fibers, in particular their electrical and magnetic properties. Ta5 deals with the process modeling of the ceramic fiber transformation.

非氧化物陶瓷纤维在陶瓷基复合材料的增强中得到了广泛的应用。尽管在过去几年中做出了相当大的努力来开发新的非氧化物陶瓷纤维，但它们在工业水平上的使用仅涉及碳化硅（SiC）纤维。但是SiC纤维非常昂贵（从1.5到10千欧元/千克），这取决于纤维的质量，主要是因为生产由日本公司主导，没有其他国家的替代产品。为了降低纤维的成本并在这一主题上具有竞争力，本项目建议动员欧洲学术研究人员，特别是法国和德国的学术研究人员的活动和资源。该项目涉及一类新型高性价比聚合物衍生非氧化物陶瓷纤维的设计、加工和性能研究，该纤维具有额外的功能特性。所提出的材料预计将被用作增强热结构应用与电气和磁性能。为了满足上述应用的要求，所获得的纤维需要在侵蚀性和恶劣环境中结合联合收割机耐久性，同时实现功能性质，例如导电性和磁性。这些性能可以通过用金属有机化合物对（Si-（B/Al）-C-N）聚合物进行改性来实现，导致功能纳米相的原位生长，同时在热解期间形成相应的陶瓷SiCN（B/Al）基质。为了实现我们的目标，该项目分为五个相互关联的科学任务。第一个任务（Ta 1）的重点是合成和表征（通过NMR，FTIR，分子量测量和元素分析）的金属改性的陶瓷聚合物。第二个任务（Ta 2）涉及聚合物纤维的熔融纺丝和固化，作为通过合成的预陶瓷聚合物的流变学研究的纺丝工艺的优化。任务3（Ta 3）集中于将Ta 2中制备的固化聚合物纤维转化成所需的含金属的官能化陶瓷纤维。通过FTIR、TG-GC/MS和固态NMR对聚合物到陶瓷的转化进行了详细的研究。任务4（Ta 4）致力于陶瓷纤维的表征，涉及含金属的SiCN（B/Al）纤维的机械和（纳米）结构特性以及功能，特别是它们的电和磁特性。Ta 5涉及陶瓷纤维转变的过程建模。

项目成果

Molecular design of melt-spinnable co-polymers as Si-B-C-N fiber precursors.

• DOI: 10.1039/c7dt02559a
• 发表时间: 2017-10
• 期刊: Dalton transactions
• 影响因子: 4
• 作者: Antoine Viard;L. Gottardo;David Lopez-Ferber;A. Soleilhavoup;C. Salameh;S. Samal;Y. Guéguen;T. Rouxel;G. Motz;F. Babonneau;C. Gervais;S. Bernard

Tuning of the high temperature behaviour of Si–C–N ceramics via the chemical crosslinking of poly(vinylmethyl-co-methyl)silazanes with controlled borane contents

• DOI: 10.1016/j.oceram.2021.100055
• 发表时间: 2021-03
• 作者: Mélanie Wynn;David Lopez-Ferber;Antoine Viard;Diane Fonblanc;Marion Schmidt;F. Rossignol;P. Carlès;G. Chollon;C. Gervais;S. Bernard

The influence of pyrolysis temperature on the oxidation resistance of carbon-rich SiCN ceramics derived from reaction of silazanes with acrylonitrile

• DOI: 10.1016/j.jeurceramsoc.2021.01.042
• 发表时间: 2021-01
• 期刊: Journal of the European Ceramic Society
• 影响因子: 5.7
• 作者: Luiz Fernando Belchior Ribeiro;André Vinícius Andrade Bezerra;Christel Gervais;Samuel Bernard;Ricardo Antonio Francisco Machado;Guenter Motz

Superparamagnetic Silicon Carbonitride Ceramic Fibers Through In Situ Generation of Iron Silicide Nanoparticles During Pyrolysis of an Iron-Modified Polysilazane.

• DOI: 10.1021/acsami.0c20885
• 发表时间: 2021-02
• 期刊: ACS applied materials & interfaces
• 影响因子: 9.5
• 作者: Antoine Viard;Hannah Kurz;Abhijeet Lale;L. Heymann;Birgit Weber;S. Bernard;M. Knauer;G. Motz