中国空间科学技术

中国空间科学技术 ›› 2010, Vol. 30 ›› Issue (5): 54-55.

• 技术交流 • 上一篇    下一篇

硅化物涂层电子束重熔表面改性技术

 于斌, 靳庆臣, 刘志栋, 何俊   

  1. （兰州物理研究所，兰州 730000)
  • 收稿日期:2009-11-03 修回日期:2010-03-16 出版日期:2010-10-25 发布日期:2010-10-25
  • 作者简介:于 斌 1983年生，2008年获兰州理工大学材料学专业硕士学位，工程师，从事航天压力容器设计工作。

Application of Electron Beam Modification Technique on Silicide Coatings

YU  Bin, JIN  Qing-Chen, LIU  Zhi-Dong, HE  Jun   

  1. (Lanzhou Institute of Physics, Lanzhou 730000)
  • Received:2009-11-03 Revised:2010-03-16 Published:2010-10-25 Online:2010-10-25

PDF (PC)

2145

被引次数

6

摘要： 在Nb521铌合金表面采用料浆烧结法制备硅化物涂层，利用高频扫描电子束对硅化物涂层进行重熔处理，通过扫描电子显微镜对处理样品表面形貌进行组织结构分析。研究表明，经过电子束重熔处理，硅化物涂层表面陶瓷晶粒粒度降低，表面粗糙度降低，陶瓷颗粒之间烧结作用增强，重熔区域与未处理区域具有明显的边界，电子束能量分布较均匀，电子束重熔提高了硅化物涂层的抗氧化性能和抗热震性能。

关键词: 电子束重熔, 表面粗糙度, 抗氧化性能, 形貌, 硅化物涂层, 卫星

Abstract: The silicide coating was prepared by fused slurry method with Nb521 alloy and re-melted by using high frequency electron beam. The morphology of specimen was analyzed by SEM and surface profiles equipment. It shows that, after electron beam re-melt process, the surface ceramic grain granularity and surface roughness decrease, the sintering effects between ceramic grains increase, and the obvious boundary appears between primary region and re-melted region. It proves that the energy distributing is well-proportioned, the high temperature oxidation resistance and shock testing validate capability are improved after electron beam remelting process.

Key words: Electron beam re-melting, Surface roughness, Oxidation resistance capability, Morphology, Silicide coating, Satellite