Silicon carbide (SiC) whiskers were synthesized by a facile catalyst reaction. Phenolic resin and silicon powders were the raw materials, and cupric nitrate (Cu(NO₃)₂) was a catalyst precursor under a reducing atmosphere at 1200 °C. The whiskers with Cu(NO₃)₂ catalyst had a core-shell structure. The inner nanowire had a diameter about 15 nm, and the external structure had a thickness of 38–65 nm. Upon increasing the as-calcined temperature, the thickness of SiO₂ shell decreased, and the diameter of the SiC core increased. The copper oxide (CuO) phase derived from Cu(NO₃)₂ was reduced to copper (Cu) by gases during the process of pyrolysis phenolic resin. Cu played a pivotal role in SiC whiskers formation and its morphology control. The Cu/Si alloy was formed by Cu dissolving with Si, and this step triggered a chain reaction to promote the production of more silicon monoxide (SiO). With the Cu(NO₃)₂ catalyst, the synthesis mechanism of SiC whiskers transformed from vapor-liquid-solid (V-L-S) to vapor-solid (V–S). The transformation of single carbon bonding phase into C–SiC/SiO₂ combined bonding phases to generate much more amount of unique C–SiC/SiO₂ interfaces improved the strength and oxidation resistance of the pyrolytic carbons of the phenolic resin.

碳化硅（SiC）晶须通过简便的催化剂反应合成。苯酚树脂和硅粉为原料，硝酸铜（Cu（NO ₃）₂）为还原性气氛，在1200°C下的催化剂前体。具有Cu（NO ₃）₂催化剂的晶须具有核-壳结构。内部纳米线的直径约为15 nm，外部结构的厚度为38–65 nm。随着煅烧温度的升高，SiO ₂壳的厚度减小，并且SiC核的直径增大。衍生自Cu（NO ₃）_2的氧化铜（CuO）相在热解酚醛树脂过程中被气体还原成铜（Cu）。Cu在SiC晶须的形成及其形态控制中起着关键作用。Cu / Si合金是通过将Cu溶解在Si中而形成的，该步骤触发了连锁反应，从而促进了更多一氧化硅（SiO）的产生。使用Cu（NO ₃）₂催化剂，SiC晶须的合成机理从气液固（VLS）转变为气固（V–S）。将单一碳键合相转变为C–SiC / SiO ₂结合键合相以生成更多独特的C–SiC / SiO ₂界面，从而改善了酚醛树脂热解碳的强度和抗氧化性。