无机材料学报2025，Vol.40Issue(7)：808-816,9.DOI:10.15541/jim20250008
感应等离子球化技术制备喷涂用高熵硼化物粉体
Preparation of High-entropy Boride Powders for Plasma Spraying by Inductive Plasma Spheroidization
余乐洋阳 1赵芳霞 2张舒心 3徐以祥 3牛亚然 3张振忠 2郑学斌3
作者信息
- 1. 南京工业大学 材料科学与工程学院,南京 211816||中国科学院 上海硅酸盐研究所,上海 200050
- 2. 南京工业大学 材料科学与工程学院,南京 211816
- 3. 中国科学院 上海硅酸盐研究所,上海 200050
- 折叠
摘要
Abstract
Fabrication of feedstock powders is a critical technology that directly influences the microstructure and performance of plasma-sprayed coatings.Conventional boron thermal reduction methods for synthesizing high-entropy boride powders encounter several limitations such as prolonged processing time,impurity contamination,and inability to obtain spray-ready powders.In this work,an inductive plasma spheroidization(IPS)process was employed to fabricate(Zr1/4Hf1/4Ta1/4Ti1/4)B2 high-entropy powders for plasma spraying in contrast to the other two traditional powder preparation routes.The morphology,internal structure,particle size distribution,density,and other fundamental properties of powders were systematically characterized.The effects of different powder fabricating processes on the microstructure and fundamental properties of high-entropy boride powders were systematically investigated,thereby validating the broad applicability of this methodology for synthesizing high-entropy boride powders.The results demonstrate that using commercial micron-sized boride powders as precursors,a hybrid process combining mixing,spray drying,sintering with IPS facilitates the fabrication of high-entropy powders with homogeneous elemental distribution.The resulting powders exhibit spherical morphology,smooth surfaces,high internal density,and high apparent/tap density.Further experiments on synthesizing different high-entropy borides with varied compositions confirm the extensive applicability of this method.The formation mechanism of high-entropy solid solutions is elucidated through first-principles calculations combined with the unique characteristics of IPS process.This work proposes a promising method for fabricating high-entropy ceramic powders suitable for plasma-spray coatings.关键词
感应等离子球化/高熵陶瓷粉体/硼化物/喷涂用粉体Key words
inductive plasma spheroidization/high entropy ceramic powder/boride/powders for spray分类
化学化工引用本文复制引用
余乐洋阳,赵芳霞,张舒心,徐以祥,牛亚然,张振忠,郑学斌..感应等离子球化技术制备喷涂用高熵硼化物粉体[J].无机材料学报,2025,40(7):808-816,9.
