کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8023193 | 1517531 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and properties of composite hydrogen permeation barrier on ZrH1.8 by sol-gel technique
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Preparation and properties of composite hydrogen permeation barrier on ZrH1.8 by sol-gel technique Preparation and properties of composite hydrogen permeation barrier on ZrH1.8 by sol-gel technique](/preview/png/8023193.png)
چکیده انگلیسی
A composite hydrogen permeation barrier has been prepared on zirconium hydride (ZrH1.8) by sol-gel coating and subsequent heat treatment under an oxidizing atmosphere. Phosphoric acid modified silica sol-gel coating was fabricated on the surface of ZrH1.8 substrate by sol-gel dip-coating technique. Scanning electron microscopy (SEM) analysis showed that the sol-gel coating fabricated on ZrH1.8 substrate was free of cracks after sintering at 600â¯Â°C. The sol-gel coating could retard the oxidation of the ZrH1.8 substrate. This allowed a defect-free oxide transition layer formed between the ZrH1.8 substrate and the sol-gel coating. The thickness of the oxide transition layer was related to the temperature of the heat treatment for the coated ZrH1.8. X-ray diffraction (XRD) analysis showed that the major phase of the oxide layer in this work was similar to the oxide layer prepared by in-situ oxidation method. It was inferred that the oxide transition layer combined with the sol-gel coating comprises a composite hydrogen permeation barrier according to the X-ray photoelectron spectroscopy (XPS) analysis. In the vacuum system at 600â¯Â°C, the performance of the composite hydrogen permeation barrier was better than that of the in-situ oxide layer. Average hydrogen outgassing rate (J) and outgassing reduction factor (D) of ZrH1.8 with in-situ zirconia layer could be enhanced to 1.74â¯Ãâ¯10â5â¯mol·mâ2·sâ1 and 2.08, respectively. By contrast, J and D value of ZrH1.8 with composite hydrogen permeation barrier could be enhanced to 1.22â¯Ãâ¯10â6â¯mol·mâ2·sâ1 and 29.70, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 352, 25 October 2018, Pages 159-165
Journal: Surface and Coatings Technology - Volume 352, 25 October 2018, Pages 159-165
نویسندگان
Ming Wu, Jiaqing Peng, Guoqing Yan, Yang Chen, Zhenyan He, Zhigao Xu, Lijun Wang,