摘要
通过制备Nb30Hf35Ni35-x Cox(x=0,5,···,35)合金,利用X射线衍射仪、扫描电子显微镜等设备研究合金相组成和铸态组织随Co含量的变化规律.通过在不同温度、压力差条件下进行渗氢实验,测定各成分合金的渗氢性能,并分析合金成分和渗氢性能之间的关系.研究结果表明,随着Co含量的增加,合金中杂质化合物相的含量逐渐降低,初生bcc-Nb相的体积分数逐渐减小,共晶相中的bcc-Nb相的体积分数逐渐增大,合金的共晶形态由棒状共晶形态逐渐演变为层片状共晶形态,且合金的渗氢性能逐渐提高.
Nb30Hf35Nia5-xCOx（x = 0, 5,…, 35） alloys were prepared through tungsten arc-melting. The composition and structure of the alloys was analyzed with scanning elec- tron microscope （SEM） and X-ray diffraction （XRD）. Evolution of as-cast structures with the Co content was studied. Hydrogen permeation experiments were conducted at various temperatures and pressure differentials. Relationship between hydrogen permeability and composition of Nb-Hf-Ni （Co） alloys was built. It has been shown that, as the Co content increases, the content of impurities of intermetallic phase in the alloy and volume fraction of the primary bcc-Nb phase gradually reduce, while volume fraction of the bcc-Nb in the eutectic gradually increases. Eutectic morphology changes from rods to lamellas. Hydrogen permeability of the alloys increases with increasing Co content.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第1期12-19,共8页
Journal of Shanghai University:Natural Science Edition
基金
国家自然科学基金资助项目(51274077
51271068)
中央高校基本科研业务费专项资金资助项目(HIT.NSRIF.2013002)
