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首页> 外文期刊>DVS-Berichte >Homogenization of coating properties in Atmospheric Plasma Spraying - Results and outlook of a DFG (German Research Foundation)-Funded Research Group
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Homogenization of coating properties in Atmospheric Plasma Spraying - Results and outlook of a DFG (German Research Foundation)-Funded Research Group

机译：大气等离子喷涂中涂层性能的均质化-DFG（德国研究基金会）资助的研究小组的结果与展望

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摘要

The goal of this research group is to homogenize properties of three-cathode plasma sprayed coatings on basis of numerical simulations and advanced diagnostics. Results of the first project phase as well as an outlook to future work are presented. A numerical model for investigation of plasma flow in the free jet, produced by three-cathode torch was developed. Modelling results are verified by plasma diagnostics (Computer Tomography). In order to include particle shrinking effects, coating formation simulation is accomplished by a newly developed model, based on Computational Fluid Dynamics coupled with the Finite Element method, whereat diagnostics carried out in the fields of particle diagnostics. During the next phase of the project, the investigation of the plasma free jet and particle injection by advanced diagnostics and simulation respectively is scheduled. In a subsequent stage the transition from conventional particles to suspensions will be considered. Coating formation simulations are scaled up to dimensions of macroscopic tensile tests. By combining these overarching investigations, appropriate process parameters for homogenized coatings will be obtained.
机译：该研究小组的目标是在数值模拟和高级诊断的基础上，使三阴极等离子喷涂涂层的性能均匀化。介绍了第一个项目阶段的结果以及对未来工作的展望。建立了由三阴极炬产生的用于研究自由射流中等离子体流动的数值模型。通过等离子体诊断（计算机断层扫描）验证了建模结果。为了包括颗粒收缩效应，通过新开发的模型来完成涂层形成模拟，该模型基于计算流体动力学和有限元方法，在颗粒诊断领域中进行了诊断。在该项目的下一个阶段，计划分别通过高级诊断和模拟对无等离子体射流和粒子注入进行研究。在随后的阶段中，将考虑从常规颗粒到悬浮液的过渡。涂层形成模拟按比例放大到宏观拉伸试验的尺寸。通过综合这些总体研究，可以获得用于均质涂层的适当工艺参数。

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