激光照射原位生成SiC晶须时粘结剂对晶须的影响

Effect of binders on SiC whisker in-situ growth by laser irradiation

进行了含粘结剂和不含粘结剂的SiC纳米颗粒激光照射原位生成SiC晶须的比对试验,用X射线衍射仪(XRD)和扫描电子显微镜(SEM)分析了晶须的相组成和微观形貌,研究了粘结剂对生成晶须的影响。结果表明,在适当的激光参数下,不含粘结剂和含粘结剂的样品中均有晶须生成,不含粘结剂样品中晶须数量较少,而含粘结剂样品中晶须数量众多,且尺寸、形态各异。SiC纳米颗粒中掺入粘结剂可大幅度提高SiC晶须的生成数量,但并不影响晶须的纯度。

The experiments of in-situ growth of the SiC whiskers by laser irradiation on SiC nano-particles coated with and without binder were performed.The microstructure and phase structure of SiC whiskers were analyzed by means of the scanning electron microscopy （SEM） and X-ray diffraction （XRD）.The results show that the SiC whiskers are grown in these specimens with the certain process parameters,but their morphology are different.The quantity of SiC whiskers in specimens with the binder is much more than that of the specimens without binder.The XRD result shows that the binder dose not effect the phase structure of SiC whiskers.