N2O4对卫星漫反射试片的污染研究

中国腐蚀与防护学报

2005, Vol. 25

Issue (2): 70-73

研究报告

本期目录 | 过刊浏览

N2O4对卫星漫反射试片的污染研究

舒勇华;刘宏立;樊菁;崔季平;谢冲

中科院力学所高温气体动力学开放实验室

CONTAMINATION AND EROSION OF MAGNESIUM FLUORIDE COATING OF DIFFUSIVE REFLECTION FLAKES BY NITROGEN TETRAOXIDE

Yonghua Shu;Hongli LiU;Jing Fan;Jiping Cui;Chong Xie

中科院力学所高温气体动力学开放实验室

全文: PDF(159 KB)

摘要: 利用漫反射率、X射线光电能谱和质谱等测量方法，研究了固态和气态四氧化二氮（N2O4）对漫反射试片氟化镁（MgF2）涂层表面的污染情况。实验表明，固态N2O4对MgF2涂层有严重侵蚀作用，N2O4固粒污染后的涂层表面漫反射率下降了20%~30%,在一定的时间内,气态N2O4对涂层表面的影响显著地依赖它的压力.试片在压力这6.9×104Pa和200Pa的N2O4蒸气中分别放置10min，前者厚度为40μm的MgF2涂层基本消失，表面漫反射率下降约20%；后者涂层表面的原子组成和漫反射率变化很小，还给出了MgF2涂层表面N2O4分子吸附摩尔密度，以及与涂层表面碰撞的N2O4分子通过化学吸附过程提取MgF2的几率。

关键词 ： N2O4, 漫反射试片, MgF2涂层, 表面污染

Abstract：This srticle, through measurement of diffusive reflectivity,X-ray photoelectron energy spectra and mass spectra,studies the contamination of magnesium fluoride(MgF2)coating diffusive reflection flakes by solid and gaseous nitrogen tetraoxide(N2O4).Our experiments show tha solid N2O4 may erode seriously the MgF2xoatings.The diffusive reflectivity of the coating surfaces,after contaminated by solid particles of N2O4,will decrease about 20%~30%.Within a certain period of time, the effects of gaseous N2O4 on MgF2coatings obviously depend upon its pressure.Exposure in N2O4 vapor for ten minutes,at the pressures of 6.9×104Pa and 200Pa,the 40μm coatings are almost disappeared for the former case,amd accompanied by about 20%decrese of the surface diffusive reflectivity,for the latter case there are a little changes in the atomic cinstitution and diffusive reflectivity of the coating surface.This article also provides the mole densit for absorption of N2O4 molecules on Mgf2 coating surfaces, and the probability for N2O4 molecules in collision with the surfaces to extract Ngf2 through a chemical absorption process.

Key words： N2O4 diffusive reflection flake MgF2 coating surface contamination

收稿日期: 2003-09-01

ZTFLH:

TG172.3+2

通讯作者: 舒勇华

Corresponding author: Yonghua Shu

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引用本文:

舒勇华; 刘宏立; 樊菁; 崔季平; 谢冲 . N2O4对卫星漫反射试片的污染研究[J]. 中国腐蚀与防护学报, 2005, 25(2): 70-73 .
Yonghua Shu, Hongli LiU, Jing Fan, Jiping Cui, Chong Xie. CONTAMINATION AND EROSION OF MAGNESIUM FLUORIDE COATING OF DIFFUSIVE REFLECTION FLAKES BY NITROGEN TETRAOXIDE. J Chin Soc Corr Pro, 2005, 25(2): 70-73 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2005/V25/I2/70

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