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Necklace‐Like Silicon Carbide and Carbon Nanocomposites Formed by Steady Joule Heating
Small Methods ( IF 10.7 ) Pub Date : 2018-03-07 , DOI: 10.1002/smtd.201700371 Hua Xie 1 , Kun Fu 1 , Chunpeng Yang 1 , Yonggang Yao 1 , Jiancun Rao 2 , Yubing Zhou 1 , Boyang Liu 1 , Dylan Kirsch 1 , Liangbing Hu 1
Small Methods ( IF 10.7 ) Pub Date : 2018-03-07 , DOI: 10.1002/smtd.201700371 Hua Xie 1 , Kun Fu 1 , Chunpeng Yang 1 , Yonggang Yao 1 , Jiancun Rao 2 , Yubing Zhou 1 , Boyang Liu 1 , Dylan Kirsch 1 , Liangbing Hu 1
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Silicon carbide (SiC)/carbon nanocomposites exhibit outstanding physical properties as well as chemical stability and can be utilized in a variety of potential applications. To synthesize SiC/C nanocomposites requires high specific surface area, moderate agglomeration, and good interfacial interaction with the substrate. However, the synthesis of these desired SiC/C nanocomposites requires amelioration in two critical aspects—improving the bond strength between C and SiC and dispersing SiC homogenously to avoid agglomeration. In this work, a Joule heating method is used to synthesize SiC/C necklace‐like nanocomposite fibers from electrospun C/Si nanofibers. A controlled current is induced to heat the C/Si nanofibers to ≈2000 K, promoting the in situ reaction between Si nanoparticles and carbon fibers to create SiC nanoparticles. SiC nanoparticles are uniformly formed in the composites with high specific surface area and strong bonding with the carbon nanofibers. The synthesis of SiC demonstrates feasibility toward in situ fabrication of unagglomerated carbide nanoparticles on a carbon‐based nanofiber with desirable interconnection bond strength.
中文翻译：
稳定焦耳加热形成的类似于项链的碳化硅和碳纳米复合材料
碳化硅（SiC）/碳纳米复合材料具有出色的物理性能以及化学稳定性，可用于多种潜在应用中。要合成SiC / C纳米复合材料，需要高比表面积，适度的团聚以及与基材的良好界面相互作用。然而，这些所需的SiC / C纳米复合材料的合成需要在两个关键方面进行改进-提高C和SiC之间的结合强度，并均匀分散SiC以避免团聚。在这项工作中，使用焦耳加热法从电纺C / Si纳米纤维合成SiC / C项链状纳米复合纤维。诱导受控电流将C / Si纳米纤维加热到≈2000K，从而促进Si纳米颗粒和碳纤维之间的原位反应以生成SiC纳米颗粒。SiC纳米颗粒均匀地形成在具有高比表面积和与碳纳米纤维牢固结合的复合材料中。SiC的合成证明了在具有所需互连键强度的碳基纳米纤维上原位制备未团聚的碳化物纳米颗粒的可行性。
更新日期：2018-03-07
中文翻译：
稳定焦耳加热形成的类似于项链的碳化硅和碳纳米复合材料
碳化硅（SiC）/碳纳米复合材料具有出色的物理性能以及化学稳定性，可用于多种潜在应用中。要合成SiC / C纳米复合材料，需要高比表面积，适度的团聚以及与基材的良好界面相互作用。然而，这些所需的SiC / C纳米复合材料的合成需要在两个关键方面进行改进-提高C和SiC之间的结合强度，并均匀分散SiC以避免团聚。在这项工作中，使用焦耳加热法从电纺C / Si纳米纤维合成SiC / C项链状纳米复合纤维。诱导受控电流将C / Si纳米纤维加热到≈2000K，从而促进Si纳米颗粒和碳纤维之间的原位反应以生成SiC纳米颗粒。SiC纳米颗粒均匀地形成在具有高比表面积和与碳纳米纤维牢固结合的复合材料中。SiC的合成证明了在具有所需互连键强度的碳基纳米纤维上原位制备未团聚的碳化物纳米颗粒的可行性。
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