将沥青除去水分后，先后加入1％（w）的硝酸镍和10％（w）的Si 粉进行改性，在通Ar气氛下，分别在900、1000、1100、1200、1300和1400℃下进行炭化处理。借助XRD、FESEM、EDS研究在Ni的催化作用下，炭化温度对硅改性沥青炭化产物物相组成及显微形貌的影响，并探讨SiC晶须的生长机制。结果表明：改性沥青分别在1000、1100、1200、1300和1400℃的Ar气氛下处理后，炭化产物中均有SiC晶须生成，长度为1～6μm，且SiC晶须的生长方式为“顶端生长”，其生长机制符合V-L-S机制。
The pitch was dried and modified with 1 mass% nickel nitrate and 10 mass% Si powder succes-sively,then carbonized in Ar atmosphere at 900,1 000,1 100,1 200,1 300,and 1 400 ℃,respectively.Effects of carbonization temperature on phase composition and microstructure of Ni-catalyzed silicon modified pitch were studied by XRD,FESEM and EDS,and the growth mechanism of SiC whisker was discussed as well.The results show that SiC whisker forms in the carbonized products of modified pitch processed in Ar atmosphere at 1 000,1 100,1 200,1 300,or 1 400 ℃;its length is about 1 -6 μm;its growth mode is apical growth,and its growth mechanism accords with V-L-S mechanism.
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