摘要
利用高真空非自耗电弧熔炼炉制备了V_(85)Ti_(10)Y_(5)和V_(85)Ti_(10)Cu_(5)氢分离合金。通过SEM、TEM、XRD、氢渗透试验、PCT吸氢试验、恒压缓冷试验,研究了Y、Cu元素的加入对合金氢渗透性能、氢溶解性能及抗氢脆性能的影响。结果表明:铸态V85Ti10Y5和V85Ti10Cu5合金组织均由V-基体和第二相组成,但前者第二相是弥散分布的富Y颗粒,而后者为既在晶内析出又沿晶界连续分布的铜钛金属间化合物。V_(85)Ti_(10)Y_(5)合金中Y_(2)O_(3)的生成及V_(85)Ti_(10)Cu_(5)合金中部分固溶Cu的斥氢作用和Cu2Ti形成使V中Ti的固溶量减少,进而降低合金中的氢浓度,减小氢固溶产生的内应力,提高抗氢脆性能。V_(85)Ti_(10)Y_(5)和V_(85)Ti_(10)Cu_(5)合金在缓冷过程中均未发生氢脆现象,表现出优异的抗氢脆性能,而且在673K时的氢渗透率分别为0.139×10^(-6)和0.174×10^(-6)mol·H_(2)·m^(-1)·s^(-1)·Pa^(0.5),是Pd_(77)Ag_(23)氢渗透率的5.5和6.9倍,与商用钯合金相比均展现出较高的渗透率。
Hydrogen separation alloys V_(85)Ti_(10)Y_(5)and V_(85)Ti_(10)Cu_(5)were prepared by high vacuum non-consumable arc melting furnace.The effects of the addition of Y and Cu elements on the hydrogen permeability,hydrogen solubility and hydrogen brittleness resistance of the alloy were investigated by SEM,TEM,XRD,hydrogen permeability test,PCT hydrogen absorption test and constant pressure slow cooling test.The results show that the as-cast V_(85)Ti_(10)Y_(5)and V_(85)Ti_(10)Cu_(5)alloys are both composed of V-matrix and the second phase,but the second phase of the former is dispersively distributed Y-rich particles,while the latter is a Cu-Ti intermetallic compound precipitated in the grain and distributed continuously along the grain boundary.The formation of Y_(2)O_(3)in V_(85)Ti_(10)Y_(5)alloy and the hydrogen-repulsive action of some solid solution Cu in V_(85)Ti_(10)Cu_(5)alloy and the formation of Cu2Ti reduce the solid solution amount of Ti in V,and then reduce the concentration of hydrogen in the alloy,reduce the internal stress generated by hydrogen solution,and thus improve the anti-hydrogen brittleness.The V_(85)Ti_(10)Y_(5)and V_(85)Ti_(10)Cu_(5)alloys show excellent anti-hydrogen embrittlement properties without hydrogen embrittlement during slow cooling.Moreover,the hydrogen permeability at 673 K is 0.139×10^(-6)和0.174×10^(-6)mol·H_(2)·m^(-1)·s^(-1)·Pa^(0.5),which is 5.5 and 6.9 times of that of Pd_(77)Ag_(23),respectively.Compared with commercial palladium alloys,they all show higher permeability.
作者
杨波
孟野
唐柏林
陈修
史晓斌
陆羽
高恒
任伟
宋广生
Yang Bo;Meng Ye;Tang Bolin;Chen Xiu;Shi Xiaobin;Lu Yu;Gao Heng;Ren Wei;Song Guangsheng(Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials,Ministry of Education,School of Materials Science and Engineering,Anhui University of Technology,Maanshan 243032,China;School of Mathematics and Physics,Anhui University of Technology,Maanshan 243032,China;Physics Department,College of Sciences,Shanghai University,Shanghai 200444,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2023年第9期3338-3344,共7页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51875002)
省部共建高品质特殊钢冶金与制备国家重点实验室
上海市钢铁冶金新技术开发应用重点实验室开放课题(SKLASS 2022-13)
上海市科学技术委员会课题(19DZ2270200)
先进金属材料绿色制备与表面技术教育部重点实验室开放课题(GFST2022KF08)。
