Molecular Dynamics Simulation of the Effect of Process Parameters on Ni/Fe Metal Thermal Spraying

doi:10.12442/j.issn.1002-185X.20200233

Home > Archive>Volume 50, Issue 6, 2021 >1896-1903. DOI:10.12442/j.issn.1002-185X.20200233

Molecular Dynamics Simulation of the Effect of Process Parameters on Ni/Fe Metal Thermal Spraying
DOI:
                        10.12442/j.issn.1002-185X.20200233
                    
Author:
                        Feng Ruicheng1,2Feng Ruicheng
School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
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Dong Jianyong1,2Dong Jianyong
School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
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Li Haiyan1,2Li Haiyan
School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
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Dong Yun1,2Dong Yun
School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
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Lei Chunli1,2Lei Chunli
School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
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Jin Wuyin1,2Jin Wuyin
School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
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Affiliation:1.School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;2.Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
Clc Number:
Fund Project:China Scholarship Council (201808625035); National Natural Science Foundation of China (51865027); the Hongliu First-class Disciplines Development Program of Lanzhou University of Technology

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Abstract:

Molecular dynamics simulations were performed to study the deposition of the thermal spraying material under different process parameters. The effects of temperatures, cluster size, and spraying speed on the deposition of Ni clusters on the Fe substrate were examined. The morphology of clusters and the subsurface damage of the substrate were analyzed. The results show that in the heating-up process of Ni cluster, the melting point becomes higher with the increase of cluster size, and the complete melting temperature of Ni cluster is about 1800 K. During the spraying process, the matrix shows a “mountain” shape due to the impact force to disordered atoms. Furthermore, it is also found that spraying speed plays an important role in the deposition process. At lower spraying speed, the flattening ratio decreases again, but at higher spraying speed, the substrate has defects, such as vacancy and atomic cluster after the impact of clusters. Thus, there is a critical spraying speed mechanism in thermal spraying.

Key words:thermal spray;cluster temperature;substrate defect;cluster morphology;molecular dynamics

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Get Citation

[Feng Ruicheng, Dong Jianyong, Li Haiyan, Dong Yun, Lei Chunli, Jin Wuyin. Molecular Dynamics Simulation of the Effect of Process Parameters on Ni/Fe Metal Thermal Spraying[J]. Rare Metal Materials and Engineering,2021,50(6):1896~1903.]
DOI：10.12442/j. issn.1002-185X.20200233

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Received:April 10,2020
Revised:June 12,2020
Adopted:June 30,2020
Online: July 07,2021
Published: June 30,2021

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