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基體表面形貌對Ni/Fe熱噴涂及結(jié)合強度影響的原子模擬
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作者單位:

1.蘭州理工大學 機電工程學院，甘肅 蘭州 730050;2.蘭州理工大學 數(shù)字制造技術(shù)與應用教育部重點實驗室，甘肅 蘭州 730050

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基金項目:

國家自然科學基金項目（No.52065036）、甘肅省自然科學基金（No.20JR5RA448）和蘭州理工大學紅柳一流學科建設項目


Effect of Substrate Surface Morphology on Thermal Spraying and Bonding Strength of Ni/Fe via Atomistic Simulation
Author:
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

Fund Project:

National Natural Science Foundation of China (52065036); Natural Science Foundation of Gansu Province (20JR5RA448); Hongliu First-Class Disciplines Development Program of Lanzhou University of Technology

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    摘要:

    通過分子動力學方法模擬了基體表面形貌對熱噴涂的影響。研究了柱狀粗糙表面和光滑表面對團簇展平、基體缺陷演化、應力分布、涂層與基體結(jié)合強度的影響。結(jié)果表明，基體表面形貌對熱噴涂結(jié)合強度影響顯著，粗糙表面不僅增加了團簇與基體的實際接觸面積，提高了附著力，而且在界面結(jié)合處形成錨固效應，從而提高了界面結(jié)合強度。同時，基體表面形貌改變了界面區(qū)域的應力分布，柱狀粗糙表面可以減小應力集中效應，降低臨界應力，減輕對基體的損傷。此外，粗糙表面會阻礙團簇的滑移，減小了展平比。

    Abstract:

    The molecular dynamics method was applied to simulate the effects of substrate surface morphology on nano-thermal spraying. The effects of columnar rough surface and smooth surface on cluster flattening, defect evolution of substrate, stress distribution, and the bonding strength between coating and substrate were investigated. The results show that the substrate surface morphology has a significant effect on the bonding strength of thermal spraying. The rough surface increases the actual contact area between the clusters and the matrix, improves the adhesion, causes the anchorage effect at the interface, and thereby enhances the bonding strength. In addition, the substrate surface morphology can change the stress distribution in the interface region. The columnar rough surface on the matrix weakens the stress concentration effect, decreases the critical stress, and reduces the damage to the substrate. Besides, the rough surface hinders the cluster slip and reduces the flattening ratio.

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雷春麗,董建勇,楊晟澤,曹卉,張雋,李海燕,馮瑞成.基體表面形貌對Ni/Fe熱噴涂及結(jié)合強度影響的原子模擬[J].稀有金屬材料與工程,2022,51(3):881~887.[Lei Chunli, Dong Jianyong, Yang Shengze, Cao Hui, Zhang Jun, Li Haiyan, Feng Ruicheng. Effect of Substrate Surface Morphology on Thermal Spraying and Bonding Strength of Ni/Fe via Atomistic Simulation[J]. Rare Metal Materials and Engineering,2022,51(3):881~887.]
DOI：10.12442/j. issn.1002-185X.20210616

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  • 收稿日期:2021-07-13
  • 最后修改日期:2021-10-20
  • 錄用日期:2021-10-27
  • 在線發(fā)布日期: 2022-03-30
  • 出版日期: 2022-03-30