首页|电镀钯对锆合金吸氢性能的影响

电镀钯对锆合金吸氢性能的影响

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锆具有良好的吸氢性能,被认为是储氘领域的候选材料.但由于其吸氢温度较高且吸氢动力学较慢,目前尚不能进行广泛应用.采用电镀钯的方法对锆进行表面改性,以提高其吸氢性能.结果表明:在经过镀钯且退火处理后的锆合金,在室温下可以实现吸氢,并且有适当的孕育期;与此同时,随着温度的升高,镀钯且退火处理后的锆合金孕育期缩短,吸氢速率变快.通过对微观结构进行分析,发现在氢化后,钯层与锆基板之间形成了过渡区,过渡区中存在PdH1.33和H0.62Zr0.38.由此可见,过渡区中的氢化物对改善锆的吸氢性能起着重要作用.通过对动力学机制进行研究,确定在室温下,镀钯且退火处理后的锆合金吸氢过程符合一维扩散机制;而在250℃时,符合二维扩散机制.
Effect of Palladium Electroplating on Hydrogen Absorption Properties of Zirconium Alloy
Zirconium is an excellent hydrogen absorption material and has been regarded as a candidate material in the deuterium storage field.However,due to its higher hydrogen absorption temperature and slower hydrogen absorption kinetics,it cannot be applied at present.Palladium electroplating was used as a surface modification to improve the property.The results show that after the palladium electroplating and annealing,the zirconium alloy can absorb hydrogen at room temperature with an appropriate incubation period.With the increase in temperature,the hydrogen absorption rate becomes faster with a shorter incubation period.A transition zone forms between the palladium layer and zirconium substrate,and PdH1 33 and H0.62Zr0.38 are found in the transition zone after hydrogenation.These hydride phases in the transition zone play an important role in improving the hydrogen absorption property of zirconium.For the kinetics mechanism,it is determined to be 1-D diffusion at room temperature and 2-D diffusion at 250 ℃.

zirconiumpalladium electroplatinghydrogen absorption temperatureshydrogen absorption kinetics

赵立功、李江豪、郭慧娟、杨大稳、张岸佳、张沛龙、周文娇、佟欢、宋西平

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北京科技大学新金属材料国家重点实验室,北京 100083

中石油工程技术研发有限公司,北京 102206

北京浩运金能新能源材料科技有限公司,北京 102100

锆 电镀钯 氢吸收温度 氢吸收动力学

国家自然科学基金国家自然科学基金State Key Laboratory for Advanced Metals and MaterialsState Key Laboratory for Advanced Metals and Materials

21171018512710212019-ZD062021Z-18

2024

10.12442/j.issn.1002-185X.20230102

稀有金属材料与工程
中国有色金属学会,中国材料研究学会,西北有色金属研究院

稀有金属材料与工程

CSTPCD北大核心
影响因子：0.634
ISSN：1002-185X
年,卷(期)：2024.53(3)
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