真空冷喷涂BaTiO3颗粒加速过程研究

邓碧欣, 孙澄川, 卢静, 吴应东, 路腾, 张咪娜

doi:10.16577/j.issn.1001-1560.2024.0087

材料保护 >

2024 , Vol. 57 >Issue 4: 140 - 148

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0087

工艺篇

真空冷喷涂BaTiO₃颗粒加速过程研究

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（1. 季华实验室功能涂层与再制造研究中心，广东佛山528200；
2. 中国科学院宁波材料技术与工程研究所，浙江宁波315000）

卢静，博士，主要从事热喷涂及冷喷涂技术研究，E-mail：lujing@jihualab.ac.cn

收稿日期: 2023-07-24

修回日期: 2023-08-19

录用日期: 2023-08-30

网络出版日期: 2024-04-30

基金资助

季华实验室自主立项项目（X190391TJ190）

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Study on the Acceleration Process of BaTiO₃ Particles during Vacuum Cold Spraying

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(1. Functional Coatings and Remanufacturing Technology Research Center,Jihua Laboratory, Foshan 528200, China;
2. Ningbo Institute of Materials of Technology and Engineering, Chinese Academy of Sciences, Ningbo 315000, China)

LU Jing（1984-）, Ph.D., Research Focus: Thermal Spraying and Cold Spraying Technology, Tel.: 0757-63220902, E-mail: lujing@jihualab.ac.cn

Received date: 2023-07-24

Revised date: 2023-08-19

Accepted date: 2023-08-30

Online published: 2024-04-30

Supported by

the Jihua Laboratory (X190391TJ190)

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摘要

以BaTiO₃陶瓷颗粒为例，模拟了在不同真空冷喷涂工艺参数下的加速过程，探讨了工艺参数对颗粒速度的影响，并通过粒子成像测速装置进行验证，最后采用真空冷喷涂制备了BaTiO₃陶瓷涂层并测试涂层性能。模拟结果表明：颗粒速度随着气体压力和气体预热温度的增大而增大；在相同气体压力和预热温度下，颗粒粒径越小受弓形激波的影响越大；多颗粒的加速规律与单颗粒相似。粒子成像测速结果表明在0.2 MPa、300 K或373 K条件下，BaTiO₃颗粒速度与模拟结果分别相差约10.2%和8.1%。在该工艺参数下，采用真空冷喷涂制备得到2～3μm连续且致密的BaTiO₃涂层，结合力大小为8 N。研究结果表明，数值模拟结合粒子成像测速得到的工艺参数及其影响规律是可靠的，可用于指导柔性陶瓷薄膜的制备。

关键词： 真空冷喷涂; 数值模拟; 颗粒速度; BaTiO3涂层; 粒子测速成像

本文引用格式

邓碧欣, 孙澄川, 卢静, 吴应东, 路腾, 张咪娜 . 真空冷喷涂BaTiO₃颗粒加速过程研究[J]. 材料保护, 2024 , 57(4) : 140 -148 . DOI: 10.16577/j.issn.1001-1560.2024.0087

Abstract

In this paper, the acceleration process of BaTiO₃ ceramic particles under different vacuum cold spraying parameters was simulated, and the effect of process parameters on particle velocity was discussed. The results were verified using particle image velocimeter. BaTiO₃ ceramic coatings were prepared using vacuum cold spraying method and their properties were tested. The simulation results showed that the particle velocity increased with the increase of gas pressure and preheating temperature. It was observed that under the same gas pressure and preheating temperature, the smaller the diameter of the particle, the more it was affected by the bow shock wave. The acceleration pattern of multiple particles was found to be similar to that of a single particle. According to the results obtained from particle image velocimetry, under the condition of and 300 K and 373 K at 0.2 MPa, the velocity of BaTiO₃ particles differed from the simulation results by about 10.2% and 8.1%, respectively. Under the process parameters, as indicated by the simulation results, the continuous and dense BaTiO₃ coatings with a thickness around 2 to 3 μm were fabricated by vacuum cold spraying, and the binding force was found to be 8 N. The research results indicated that the process parameters and their influence laws, obtained through numerical simulation combined with particle image velocimetry, were reliable and could be used to guide the preparation of flexible ceramic films.

Key words： vacuum cold spraying; numerical simulation; particle velocity; BaTiO3 coatings; particle image velocimetry

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