采用国产炭素墨水与少量硅微粉混合的液体充分浸渍聚丙烯腈(PAN)基碳毡并烘干后, 在1450℃、真空条件下与硅微粉的气相产物发生碳热还原等反应, 在碳毡内部制备出大量SiC纳米线. 此纳米线多有弯曲形貌, 其线径范围为25~150nm, 可测轴向线长达15μm以上. 另有大量SiC的膜、纳米团絮、纳米颗粒等结构体存在. 对烧结试样做了XRD、SEM、TEM的表征, 初步研究了其组成结构、微观形貌及纳米线的生长机理.
Carbolic ink mixed with a few tiny silicon powders was adopted to fully immerse polyacrylonitrile (PAN) based carbon felt then dried it, and as the result of such reactions as carbon thermal reduction etc, with gaseous outcomes generated from tiny silicon powders at 1450℃ in vacuum, abundant SiC nano-threads were fabricated within the inner space of the carbon felt. There exist many SiC nano-threads with tortuous pattern, their diameters are within the range of 25nm to 150nm, and detectable lengths of them can be more than 15μm. There also exist various SiC structures such as membranes, nano-blowballs, nano-particles, and so on. Characterizations for the sintered sample of XRD, SEM, and TEM analyses were carried out, and components, microstructures of the sample as well as growth mechanisms of the nano-threads were preliminarily studied.
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