U-Co系非晶合金的形成与耐蚀性研究

发布时间：2018-06-06 07:49

本文选题：非晶合金 + 铀合金　；参考：《金属学报》2015年05期

【摘要】：将U-Co二元系中的富U合金UxCo100-x(x=50~87.5)作为研究对象,采用电弧熔炼与甩带方法制备它们的母合金锭与薄带样品,通过XRD和DSC研究合金样品的相组成与稳定性,同时采用动电位极化方法研究非晶合金的耐腐蚀性能.结果表明,条带非晶形成的成分区间为58.5≤x≤78,其最佳成分出现在U66.7Co33.3附近;在20 K/min加热速率下,U-Co非晶的晶化温度位于534~550 K之间,晶化放热焓为4.8~8.5 k J/mol,约化晶化温度Trx值最高达0.535;在50×10-6Cl-溶液中,U-Co非晶合金的腐蚀电位大都接近-50 m V,其抗腐蚀能力显著优于贫铀,且U-Co非晶耐腐蚀性与其形成能力显示出正相关性.
[Abstract]:The rich U alloy UxCo100-x (x=50~87.5) in the U-Co two element system is used as the research object. Their parent alloy gold ingot and thin strip samples are prepared by arc melting and flinging method. The phase composition and stability of the alloy samples are studied by XRD and DSC, and the corrosion resistance of amorphous alloys is studied by the dynamic potential polarization. The results show that the strip is not. The composition interval of the crystal is 58.5 less than x < 78 and the best component appears near U66.7Co33.3. At 20 K/min heating rate, the crystallization temperature of U-Co amorphous is located between 534~550 K, the crystallization enthalpy is 4.8~8.5 K J/mol, and the Trx value of the crystallized crystallization temperature is up to 0.535. In 50 x 10-6Cl- solution, the corrosion potential of the U-Co amorphous alloy is mostly close to those 0 m V, its corrosion resistance is significantly better than that of depleted uranium, and the amorphous corrosion resistance of U-Co shows a positive correlation with its forming ability.
【作者单位】：中国工程物理研究院;大连理工大学材料科学与工程学院三束材料改性教育部重点实验室;
【基金】：国防基础科研计划项目B1520133007 中国工程物理研究院科技发展基金项目2013A0301015资助~~
【分类号】：TG139.8

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