Hydrogen permeation resistance and characterization of Si–Al and Si–Zr composite sol oxide coating on surface of zirconium hydride
来源期刊：Rare Metals2017年第1期
论文作者：Ming Wu Yang Chen Jia-Qing Peng Guo-Qing Yan Yu-Pu Sun Jian-Dong Zhang Shun-Li Zhang Li-Jun Wang
文章页码：55 - 60
摘 要：The hydrogen permeation resistance of Si–Zr（SZ） and Si–Al（SA） composite sol oxide coating on zirconium hydride blocks(Zr H1.8) was studied. SZ and SA composite sol were prepared by sol–gel method. SZ and SA composite oxide coatings were prepared on the surface of Zr H1.8（in situ oxidized or not） in turns by dip-coating and heat treatment. Hydrogen permeation of Zr H1.8with and without composite oxide coating was compared.Hydrogen desorption experiments in thermal vacuum show that hydrogen permeation resistance of SA composite oxide coating is better than that of SZ, to a certain extent,which could decrease hydrogen thermal loss. Experimental results in the working condition show that the SA composite oxide coating can not only prevent hydrogen permeation, but also retard contact and reaction between CO2 and Zr H1.8matrix, which could mitigate excessive oxidation of in situ oxide film. Differential scanning calorimetry and thermogravimetry（DSC–TG） analysis was performed to investigate the decomposition behavior of SA and SZ liquid sol in heat treatment process. X-ray diffraction（XRD） and scanning electron microscopy（SEM） analysis were employed to characterize the phase composition,surface and cross-section morphology of the coatings.
Ming Wu，Yang Chen，Jia-Qing Peng，Guo-Qing Yan，Yu-Pu Sun，Jian-Dong Zhang，Shun-Li Zhang，Li-Jun Wang
Division of Rare Metals Metallurgy and Materials, General Research Institute for Nonferrous Metals
摘 要：The hydrogen permeation resistance of Si–Zr（SZ） and Si–Al（SA） composite sol oxide coating on zirconium hydride blocks(Zr H1.8) was studied. SZ and SA composite sol were prepared by sol–gel method. SZ and SA composite oxide coatings were prepared on the surface of Zr H1.8（in situ oxidized or not） in turns by dip-coating and heat treatment. Hydrogen permeation of Zr H1.8with and without composite oxide coating was compared.Hydrogen desorption experiments in thermal vacuum show that hydrogen permeation resistance of SA composite oxide coating is better than that of SZ, to a certain extent,which could decrease hydrogen thermal loss. Experimental results in the working condition show that the SA composite oxide coating can not only prevent hydrogen permeation, but also retard contact and reaction between CO2 and Zr H1.8matrix, which could mitigate excessive oxidation of in situ oxide film. Differential scanning calorimetry and thermogravimetry（DSC–TG） analysis was performed to investigate the decomposition behavior of SA and SZ liquid sol in heat treatment process. X-ray diffraction（XRD） and scanning electron microscopy（SEM） analysis were employed to characterize the phase composition,surface and cross-section morphology of the coatings.
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