论文部分内容阅读
使用氢电弧等离子体方法制备纳米Cu和Ag超微粒子,这些粒子在制备过程中自动地高温溶氢.同时使用相近的电源功率的惰性气体蒸发法制备纳米Cu和Ag.分别将各种样品在低温退火,同时使用TEM监测粒子的大小,选择最佳退火温度制成标准样品.使用TEM,HRTEM,XRD线形精炼与Fourier分析方法研究了纳米Cu和Ag中的缺陷.发现了纳米Cu和Ag的x射线衍射线形的非对称性并研究了其物理意义.用Fourier分析方法计算得到纳米Cu和Ag中的孪晶几率.并对于纳米材料中的氢对结构的影响进行了讨论.
The nano-Cu and Ag ultrafine particles were prepared by hydrogen arc plasma method, and these particles automatically dissolved hydrogen at high temperature during the preparation process. At the same time, nano-Cu and Ag were prepared by inert gas evaporation with similar power supply. Annealing and the size of the particles were monitored by TEM and the optimal annealing temperature was selected to make a standard sample.The defects in nano-Cu and Ag were investigated by TEM, HRTEM, XRD and Fourier analysis.It was found that x The asymmetry of the ray diffraction pattern was studied and its physical meaning was studied. The probability of twinning in Cu and Ag nanocrystals was calculated by Fourier analysis. The effect of hydrogen on the structure of nanomaterials was also discussed.