研究了偏压镀、循环氩离子轰击镀和间歇式镀对铀上铝镀层 组织及防腐蚀性能的影响.结果表明,3种离子轰击镀方法对铝镀层的组织产生强烈影响,且 组织的致密程度与其防腐蚀性能呈现了较好的一致性.在-100 V、-200 V和-500 V偏压条件 下,镀层组织致密、防腐蚀性好;在-300 V偏压下,镀层的致密性和防腐蚀性均差,未加偏压(0 V) 的次之;循环氩离子轰击镀和间歇式镀对提高镀层的致密性和防腐蚀性更为显著.离子轰击镀 沉积的铝镀层均可不同程度地为铀提供好的保护效果.
Effect of three kinds of ion bombardments,including deposited with d.c.bias voltages,circulated-argon ion bombardment,and at in tervals on microstructures and corrosion resistance of aluminum coatings on uranium substrate was investigated.The results show that coating microstructu res are influenced strongly by ion bombardment methods,of which coating microstr uctures correspond to their different corrosion resistance to uranium. The microstructures are much more closely packed and the corrosion resistance ar e much better at -100 V,-200 V and -500 V than those of at -300 V,0 V .The microstructures and corrosion resistance of aluminum coatings ca n also be improved remarkably by both circulated-argon ion bombardment and at in tervals deposition.All of aluminum coatings can provide protection for uranium t o different extent.
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