Paper Title:
SiO2 Coatings Prepared by Sol-Gel Process Protecting Silver from Atomic Oxygen Erosion
  Abstract

SiO2 coatings were deposited on silver foils substrate by sol–gel method and their atomic oxygen (AO) erosion resistance was tested in a ground-based AO simulator. The surface morphologies and structures of the SiO2 coatings were investigated by Scanning Electron Microscopy (SEM) 、X-Ray Photoelectron Spectroscopy (XPS). The experimental results clearly demonstrate that this kind of coatings provided a good protection from AO attack. The erosion yield of the coatings was 2×10-26 cm3/atom, decreased by 30 times compared with that of the uncoated silver foils. This SiO2 layer significantly retarded the penetration of oxygen atoms, preventing further oxidation of the bulk silver. It was found that after AO exposure, the film structure tends to transfer from SiOH to amorphous SiO2. This implies that a more stable amorphous SiO2 structure could be formed in sol-gel SiO2 film during AO exposure. The results demonstrate that the coatings prepared by sol-gel technique can protect the silver from atomic oxygen erosion and can be used easily for practical application.

  Info
Periodical
Chapter
Chapter 5: Materials in Energy and Environment (2)
Edited by
Dongye Sun, Wen-Pei Sung and Ran Chen
Pages
3044-3047
DOI
10.4028/www.scientific.net/AMM.121-126.3044
Citation
S. W. Duo, M. M. Song, T. Z. Liu, M. S. Li, "SiO2 Coatings Prepared by Sol-Gel Process Protecting Silver from Atomic Oxygen Erosion", Applied Mechanics and Materials, Vols. 121-126, pp. 3044-3047, 2012
Online since
October 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hong Yi Li, Yun Han Ling, Xing Jun Jiang, Xin De Bai
Abstract:TiO2 is one kind of semiconductor-based photocatalyst. TiO2 shows relatively high reactivity and chemical stability under ultraviolet (UV)...
819
Authors: G. Deniz, Saduman Sen, Ugur Sen
Abstract:In this work, some surface properties of AISI M2 steel were improved by a thermoreactive deposition process. Gas nitriding was realized on...
219
Authors: Xian Hui Li, Yu Jun Xue, De Ying Zhang, Ji Shun Li
Chapter 3: Advanced Manufacturing Technology
Abstract:The Ni-Nd2O3 nanocomposite coatings were prepared by electrodeposition with different modes of ultrasound action. The...
280
Authors: Jin Xue Zhang
Chapter 2: Engineering Ceramics and Ceramic Composites
Abstract:Compound ceramic coatings with the main crystal phase of Al2TiO5 (as-coated samples) were prepared in situ on the surface of Ti-6Al-4V alloy...
1066
Authors: Shun Qi Zheng, Xiao Jing Li, Li Ping Zhu, Yun Chen, Jian Min Luo
Chapter 1: Alloy and Nanometer Materials
Abstract:Micro-arc oxidation (MAO) coatings were synthesized on MB3 magnesium alloy substrate. Two different electrolyte (Ⅰ) and electrolyte (Ⅱ) were...
54