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Dynamic processes during high velocity oxyfuel spraying

机译:高速氧气喷涂过程中的动态过程

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摘要

High velocity oxyfuel spraying is a new, rapidly developing technology for coating formation which is now challenging plasma spraying. Dynamic processes during HVOF spraying have considerable influence on the coating quality. The dynamic processes considered are as follows: combustion and gas dynamics, mechanical and thermal inflight behaviour of the powder particles, and droplet flattening. The corresponding literature is also reviewed. The following points are taken into account: fluid behaviour inside and outside a spraying gun; fluid-particle interactions; particle shape and morphology; internal heat conduction in powder particles; mass transfer (dissolution, diffusion, etc.) inside the composite particles; particle heating, fusion, cooling, and solidification; surface roughness, splat solidification, and mass loss of the droplet liquid phase during droplet flattening. Good agreement between theoretical and experimental results is shown to exist. The results obtained can be used for prediction of the optimum conditions of spraying.
机译:高速氧燃料喷涂是一种新的,发展迅速的涂层形成技术,现在正挑战等离子喷涂。 HVOF喷涂过程中的动态过程对涂层质量有很大影响。所考虑的动态过程如下:燃烧和气体动力学,粉末颗粒的机械和热飞行中行为以及液滴变平。还回顾了相应的文献。考虑以下几点:喷枪内部和外部的流体行为;流体-颗粒相互作用;颗粒形状和形态;粉末颗粒内部的热传导;复合颗粒内部的传质(溶解,扩散等);颗粒加热,熔化,冷却和固化;液滴扁平化过程中,液滴的表面粗糙度,飞溅固化和液滴液相的质量损失。理论和实验结果之间存在很好的一致性。获得的结果可用于预测最佳喷涂条件。

著录项

  • 来源
    《International Materials Reviews》 |1996年第1期|p.13-32|共20页
  • 作者

    V. V. Sobolev; J. M. Guilemany;

  • 作者单位

    Centro de Proyeccion Termica, Metalurgia Ffsica-Ciencia de Materiales, Departamento de Ingenieria Qufmica y Metalurgia, Universidad de Barcelona, 08028 Barcelona, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 一般性问题;工程材料学;
  • 关键词

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