乙酰胺-尿素- NaBr熔体中电沉积Gd-Mg-Ni合金的研究

RE-Mg-Ni系三元合金是AB3型新型储氢材料.研究了在乙酰胺-尿素- NaBr熔体中(353K)电沉积制备该合金的可行性.循环伏安法研究证实,该熔体中,Gd(Ⅲ)、Mg(Ⅱ)在Pt、Cu电极上不能单独沉积,但可以被铁族Ni(Ⅱ)诱导共沉积.在Cu基体上由恒电位电解法成功的沉积出Gd-Mg-Ni合金膜,合金膜中Gd和Mg的含量随电解电位、时间及Gd(Ⅲ)/Mg(Ⅱ)/Ni(Ⅱ)摩尔比的变化而变化.实验同时研究了Ni(Ⅱ)在Pt、Cu电极上的电化学行为,表明其还原为一步完全不可逆反应,并测得其传递系数α和扩散系数Do.     

电沉积RE-TM(RE=Dy,Nd,Eu;TM=Co)合金膜及其磁性质

在353 K的尿素-乙酰胺-NaBr-KBr熔体中,用恒电位电解法在Cu基片上制备了稀土RE(Dy,Nd,Eu)-铁族TM(Co)合金膜.利用循环伏安法研究了熔体的电化学行为.电化学实验结果表明,在Pt电极上,Co(Ⅱ)+2e→Co(0)是一步完全的不可逆反应,并测得Co(Ⅱ)在Pt电极上的传递系数a以及扩散系数D0.稀土元素(Dy,Nd,Eu)难以被单独沉积,但能被Co(Ⅱ)诱导共沉积.用EDS分析合金膜的成分及含量.用XRD和振动样品磁强计(VSM)分析样品退火前后的晶相和磁性能变化特征.实验结果表明,合金膜的表面形貌和磁性与其成分组成及沉积电位紧密相关,且稀土离子的被诱导能力取决于稀土与铁族原子之间的电负性差值.     

电沉积制备Gd-Co合金膜的研究

在353K的乙酰胺-尿素-N aB r熔体中,P t、Cu电极上,Co(Ⅱ)+2e→Co(0)是一步完全不可逆反应,测得0.060m o l.L-1CoC l2-乙酰胺-尿素-N aB r中,Co(Ⅱ)在P t上,传递系数α=0.28,扩散系数D0=4.68×10-5cm2.-s 1,Cu上α=0.28,D0=4.06×1-0 7cm2.-s 1。G d(Ⅲ)不能单独还原为G d(0),但可以被Co(Ⅱ)诱导共沉积。由恒电位电解法得到非晶态的G d-Co合金,G d的含量随阴极电位的负移,G d(Ⅲ)/N i(Ⅱ)摩尔比增大以及电解时间延长而增大。     

Gd_(0.97)V_(0.03)合金的强度和耐腐蚀性能研究

本文对Gd0．97V0．03合金的硬度、抗拉强度、耐腐蚀性以及相关机理进行了研究。研究发现：Gd0．97V0．03合金硬度和抗拉强度分剐为86．2HV和205MPa,相比Gd分剐提高了40％和12％;相同的腐蚀时间下,Gd0．97V0．03合金的腐蚀量和腐蚀速度在开始时高于纯Gd．但经过1天左右水腐蚀后,其腐蚀量和腐蚀速度明显低于纯Gd,Gd0.197V0．03合金腐蚀层产物主要为Gd的氧化物Gd2O3,以上结果表明该系列材料有望成为良好的室温低场磁制冷工质。     

Er-Fe-Ni合金膜在二甲基亚砜中电化学制备的研究

利用循环伏安法和恒电位电解法研究了室温条件下在LiClO4-DMSO(二甲基亚砜)体系中Er-Fe-Ni合金膜的电化学制备，实验结果表明：在0．1mol．L^-1ErCl3-0．1mol.L^-1FeCl2-0．1mol．L^-1 NiCl2-0．1mol.L^-1LiClO4-DMSO体系中，控制电位在-2.00V--2．60V范围内进行恒电位电解，可得到表面均匀、附着力强、有金属光泽的黑色非晶态Er-Fe-Ni合金膜，其中稀土Er的质量百分含量可达31．39％～41．63％。     

耐湿法磷酸和耐氯化物引起的局部侵蚀的Ni-Cr-Mo合金

一种热稳定的，耐湿法磷酸和氯化物引起的局部侵蚀的镍一铬一钼合金，该合金包含(质量分数)31．0％到34．5％的铬，7．0％到10．0％的钼，最高0．2％的氮，最高3．0％的铁，最高1．0％的锰，最高0．4％的铝，最高0．75％的硅，最高0．1％的碳以及余量的镍和杂质。     

整体干电池锌筒新型材料的研究

采用单因素试验化选法，研究了以铈为主的轻混合稀土的含量变化（含量变化范围的质量分数为0％～0．5％）对Zn－0．5％Pb合金性能的影响，并与XD2合金的性能进行了比较．试验结果表明：当混合稀土的添加量为0．07％～0．2％时，Zn－0．5％Ph－RE合金的抗拉强度与XD2合金的基本相同，冲压性能略低，但耐均匀腐蚀性能比XD2合金优越，延伸率高7％，代替XD2合金作干电池的负极材料，能延长干电池的使用寿命．     

阀座用烧结合金、阀座及其制备方法

阀座用烧结合金含有：1％～2％(质量分数，下同)碳，3．5％～4．7％铬，4．5％～6．5％钼，5．2％～7．0％钨，1．5％～3．2％钒，余者为铁和不可避免的杂质。在分布有碳化物的烧结合金构架基体中分散着1％～3％顽火石粒子、15％～25％的维氏硬度为500～900的硬质合金粒子(A)以及5％～15％的维氏硬度为1000或更高的硬质合金粒子(B)(A B：35％或更低)。     

碳对Rene′41合金组织和性能的影响

讨论了碳含量对Ｒｅｎｅ′４１合金组织和性能的影响。结果表明：合金中碳含量的质量分数约小于０．０５％、大于０．１０％时，合金的室温塑性和持久寿命均有很大降低，降低的原因主要是形成晶界膜；合金中的碳降低时，还可以促进μ相形成，导致合金脆化。     

碳对Rene‘41合金组织和性能的影响

讨论了碳含量对Ｒｅｎｅ‘４１合金组织和性能的影响。结果表明：合金中碳含量的质量分数约小于０．０５％、大于０．１０％是，合金的室温塑性和持久寿命均有很大降低，降低的原因主要是形成晶界膜，合金中的碳降低时，还可以促进μ相形成，导致合金脆化。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.