Spatial composition distribution of a Ni-Cu binary alloy powder in a thermal plasma process
Spatial composition distribution of a Ni-Cu binary alloy powder in a thermal plasma process
复制标题
DOI：
10.1016/j.jallcom.2021.162792
复制
发表时间：
2021-11
影响因子：
6.2
通讯作者：
Y. Hirayama;M. Shigeta;K. Takagi;K. Ozaki
中科院分区：
文献类型：
--
作者：
Y. Hirayama;M. Shigeta;K. Takagi;K. Ozaki
采用Ni-Cu类质同晶合金体系，对热等离子体工艺制备的纳米颗粒的组成进行了定量研究。具体而言，Ni-Cu合金纳米粉末的平均粒径约为70 nm的热等离子体工艺制备和颗粒组成进行了研究。由于晶格常数遵循Vegard定律，成功地获得了平均组成相当于预定组成的纳米粉末。根据由各粒子得到的EDS分析，粉末的组成分布的标准偏差为7.7原子%。计算研究表明，由于通过纳米液滴形成纳米颗粒，每个颗粒具有均匀的组成，并且估计粉末中的组成分布为1.05原子%。此外，通过在一定位置捕获粉末，实验研究了反应室中的合金粉末的空间成分分布，结果表明，粉末的成分分布在空间上是变化的。
The composition of nanoparticles obtained by a thermal plasma process was quantitatively investigated using a Ni-Cu isomorphous alloy system. Specifically, a Ni-Cu alloy nanopowder with an average particle diameter of ~ 70 nm was prepared by the thermal plasma process and the particle composition was investigated. As the lattice constant follows the Vegard's law, a nanopowder with an average composition equivalent to the predefined composition was successfully obtained. According to the EDS analysis obtained from each particle, the standard deviation of composition distribution was 7.7 at% as a powder. The computational study indicated that each particle has a homogeneous composition because of the nanoparticle formation via nanodroplet and that a composition distribution of 1.05 at% is estimated in the powder. Further, the spatial composition distribution of the alloy powder in the reaction chamber was experimentally studied by trapping the powder at a certain location, and the results indicated that the composition distribution of the powder varied spatially.