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

DENG Bixin, SUN Chengchuan, LU Jing, WU Yingdong, LU Teng, ZHANG Mina

doi:10.16577/j.issn.1001-1560.2024.0087

Materials Protection >

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

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

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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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

Cite this article

DENG Bixin, SUN Chengchuan, LU Jing, WU Yingdong, LU Teng, ZHANG Mina . Study on the Acceleration Process of BaTiO₃ Particles during Vacuum Cold Spraying[J]. Materials Protection, 2024 , 57(4) : 140 -148 . DOI: 10.16577/j.issn.1001-1560.2024.0087

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