• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>DVS-Berichte >Homogenization of Coating Properties in Atmospheric Plasma Spraying - Current Results of a DFG (German Research Foundation)-Funded Research Group
【24h】

Homogenization of Coating Properties in Atmospheric Plasma Spraying - Current Results of a DFG (German Research Foundation)-Funded Research Group

机译：大气等离子喷涂中涂层特性的均质化-DFG（德国研究基金会）资助的研究小组的最新结果

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the area of atmospheric plasma spraying, newly-developed triple-cathode technologies offer the potential to homogenize the coating properties with respect to porosity and residual stresses. Focused on numerical simulation, combined with advanced diagnostics, the goal of this research group is to adjust these properties systematically. A numerical model that couples fluid dynamic, electro-magnetic and thermal phenomena for a three-cathode torch was developed to investigate the plasma and the electric arc behaviour inside the torch. With help of self-developed computer tomography equipment, which is based on emission spectroscopy, combined with the solution of the Saha equation in thermodynamical equilibrium, it is now possible to reconstruct the 3-dimensional temperature distribution close to the torch outlet. This measurement allows us to confirm the torch numerical modelling. Coating formation is simulated by coupled computational fluid dynamics (CFD) and FEM simulation, so that fluid structure interaction is taken into account. This innovative approach has the advantage to predict residual stresses which occur during cooling and moreover the shrinking effects can be considered. By simulation of the individual regions, in combination with experimental results, which also include the particle velocity, diameter and surface temperature, the corresponding process parameters can be obtained for the desired coating properties.
机译：在大气等离子喷涂领域，新开发的三阴极技术提供了在孔隙率和残余应力方面使涂层性能均匀化的潜力。专注于数值模拟并结合高级诊断功能，该研究小组的目标是系统地调整这些属性。建立了耦合三阴极炬的流体动力学，电磁和热现象的数值模型，以研究炬内部的等离子体和电弧行为。借助基于发射光谱的自行开发的计算机层析成像设备，结合热力学平衡中的Saha方程解，现在可以重建靠近割炬出口的3维温度分布。这种测量使我们能够确定割炬的数值模型。通过耦合计算流体动力学（CFD）和FEM模拟来模拟涂层的形成，从而考虑了流体结构的相互作用。这种创新方法的优点是可以预测冷却过程中出现的残余应力，并且可以考虑收缩效应。通过模拟各个区域，并结合包括颗粒速度，直径和表面温度在内的实验结果，可以获得所需涂层特性的相应工艺参数。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号