摘要
为研究无定形BCN材料的原子结构特征,采用分子动力学方法模拟了高温下无定形BCN体系的动力学行为,计算并分析了引入C原子对体系的径向分布函数(RDF)和配位数的影响.模拟结果表明,C原子对BCN体系的RDF曲线的峰位置及形状影响很小,但使其偏径向分布函数(PRDF)的一些峰向右偏移;引入的C原子部分占据了原来N原子的位置,使得B-N的配位数降低.在模拟条件下,未观察到BN相与C相分离.
Molecular dynamics simulations on amorphous BCN system were carried out in order to investigate the structure character of short-range atomic arrangements, and to analyze the influence of the addition of C on the radial distribution function （RDF） and coordination number of the amorphous system at different temperatures. The results showed that there was little influence of C doping in amorphous BCN on the position of peaks and shape of RDF curves, but some partial RDF peaks shifted to the right contrasting to the PRDF of the amorphous BN. In amorphous BCN system, the added C atoms took partly up the positions of N atoms, reducing the coordination number of B-N atom pairs. There was no phase separation between BN phase and C phase at the simulation condition.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2006年第7期878-882,共5页
Acta Physico-Chimica Sinica
基金
西北工业大学博士论文创新基金(CX200410)资助项目
关键词
无定形BCN
分子动力学
径向分布函数
配位数
Amorphous BCN, Molecular dynamics, Radial distribution function, Coordination number（CN）
