等离子喷涂过程中纳米氧化钛的结构变化研究

Investigation on Structural Transform of Nano Titania PowdersDuring Plasma Spraying Process

本文阐述了等离子喷涂过程中氧化钛纳米粉的相变特征和显微结构的变化特征．利用XRD和TEM分析方法分别对氧化钛纳米微粒进行晶体结构和显微结构研究，并对其晶胞参数进行了计算．结果表明，该条件下等离子喷涂的氧化钛微粒属于三斜晶系，其粒径分布大约在10～100um的范围．作为对比，同时进行了氧化钛纳米粉体在烧结过程中相变及微结构变化的研究．

The characteristics of phase transformation and microstructure of nano titanium oxide powders during plasma spraying were discussed. XRD and TEM methods were used to determine thecrystal structure and microstructure of the plasma sprayed nano titanium oxide powders. Moreover, the nano titanium oxide powders were also sintered in a furnace and characterized with XRDand TEM. The results show that plasma spraied titanium oxide powders belong to the triclinicsystem, whose particle size ranges from several nanometers to one hundred nanometers.