JIANG Xiaoxia SUN Li LI Shizhuo XIAO Yaotian Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
The corrosion rate,together with corrosive wear and corrosion coefficient under load,of alloy CD-4MCu in 69% H_3PO_4 or 69% H_3PO_4+500 ppm NaCl solution measured,and the morphology of their wear tracks was then observed by SEM.The alloy CD-4MCu is revealed to be superior in corrosive wear resistance to stainless steel 304 and even to Carpenter 20Cb3,a high corrosion resisting alloy.From its features of duplex phase structure,it could be suggested that the weight loss related to mechanical factor was improved by existence of austenitic phase due to its deformation strengthening.
关键词:
duplex alloy
,
null
,
null
,
null
材料科学技术（英文）
A large quantity of laminated fine grain zones were observed in the Al-Mg-Li alloy weld metal by manual TIG, which was not found in ordinary Al alloy welds. The fine grain zone is formed because of the Al-3(Zr,Ti) particles in the filler metal and the manual filling of filler metal in welding process.
关键词:
Tomoki TSUMURA
,
Michio INAGAKI
材料科学技术（英文）
Electrochemical insertion/extraction sf Li on cathode materials of anatase type TiO2, quasi-layered structure V2O5 and layered structure MoO3 was measured on samples of which structures were well characterized and showed a wide range of crystallinity. On the basis of experimental results on structure, morphology and charge-discharge characteristics, the effect of crystallinity of the cathode materials on electrochemical Li insertion/extraction performance was discussed. These three transition metal oxides were classified as one group on the basis of whether the crystallinity of these oxides affects to the performance or not, LiMn2O4 and LiCo0.5Ni0.5O2 belongs to the former group and TiO2, V2O5 and MoO3 to the latter.
关键词:
Zhijian LIU
,
Zhiyou LI
,
Wei DUAN
,
Xuanhui QU
,
Baiyun HUANG
,
Siqi ZHANG
材料科学技术（英文）
A LI-B alloy has been prepared using a pretreated amorphous B powder and pure Li ingot as starting materials by continually slow addition of B powder and intensified stirring in the process of melting. The microstructure and the discharge characteristic of the materials have been investigated. Results show that the problem of temperature control in synthesis would be modified by means of continual addition of B powder, the Li7B6 would be more finery distributed in the metal Li by means of intensified stirring. The discharge characteristic of the Li-B alloy using amorphous B as starting materials is almost the same with that of using crystalline B.
关键词:
Wei HAN
金属学报(英文版)
This work presents a study on electrochemical formation of Mg-Li-Al alloys on an inert electrode (Mo electrode) in a molten KCl-LiCl-AlCl3-MgCl2-KF system. It aims at preparation Mg-Li-Al metal alloy directly under an optimal electrolytic parameters. Main factors which affect current efficiency are investigated. We have discussed the co-electrodeposition conditions and the effect of technical parameters on these experiments, and gained a good electrolytic process. The result of calculation shows that co-electrodeposition Mg, Li and Al occurs at the cathode current density higher than 9 A/cm2 and electrolytic voltage between 6 to 9 V. And at the optimal parameters, 12-13 A/cm2, 620-640 ℃, the highest current efficiency reaches as high as 86 %. Lithium combined with magnesium forms Li0.92Mg4.08 and Li3Mg7, and aluminum mainly exists in a form of Mg0.58Al0.42, distributing in the alpha phases and beta phases.
关键词:
Mg-Li-Al
,
熔盐
,
电解
,
共电沉积
李志宏
,
柳卫平
,
白希祥
,
郭冰
,
连钢
,
颜胜权
,
王宝祥
,
陆昀
,
曾晟
,
苏俊
原子核物理评论
doi:10.3969/j.issn.1007-4627.2005.01.006
利用8Li次级束测量了质心系能量7.8 MeV 2H(8Li, 9Li)1H反应的角分布, 导出了8Li(d, p)9Li反应的天体物理S因子及9Li→8Li+n虚衰变的渐近归一化系数.
关键词:
8Li(d,p)9Li反应
,
角分布
,
天体物理S因子
,
渐近归一化系数
HUANG Jianshun CHEN Junming Shanghai Institute of Metallurgy
,
Academia Sinica
,
Shanghai
,
China Research Associate
,
Shanghai Institute of Metallurgy
,
Academia Sinica
,
Shanghai 200050
,
China
金属学报(英文版)
Crystal structure of γ-Li_xFe_2O_3,inserted Li electrochemically,was studied by Moss- bauer spectroscopy together with X-ray diffraction,XPS and electrochemical method,On the insertion of Li at low current density,the crystal structure is keeping original spinel; while at higher current density or by thermal activation,owing to violent movement of Li~+ ions,part of crystal structure transforms into rock type similar to face-centered cubic structure of ferrous oxide.The transition channels during insertion of Li~+ ions and limitation of Li~+ ions inserted were discussed.
关键词:
null
,
null
,
null
Journal of Chemical Physics
With the help of potential mapping techniques, molecular dynamics simulations have been performed to study the local structure features in binary liquid Li-Tl alloys. The generalized nonlocal model pseudopotentials have been chosen as the bases for our calculations. Both the bond orientational order and pair analysis approach have been adopted as the basic structural functions to examine the structure features in binary liquid Li-Tl alloys. In addition, bonded pairs with various symmetries, icosahedra, defective icosahedra, Frank-Kasper polyhedra, etc., formed in the Li-Tl alloys are examined in detail, and the relationship between the structure features and composition has been established. The results show that the distribution of attractive parts of the potentials play an important role in characterizing the Liquid structure. Finally, the results are discussed in detail. (C) 1995 American Institute of Physics.
关键词:
variational thermodynamic calculations;bond-orientational order;rapidly quenched metals;molecular-dynamics;sd metals;glasses;crystallization;transitions;solids
