The multi element high entropy alloys Al2 CrFeNiCox CuTi （x = 0. 5,1. 0,1. 5,2. 0） with different Co contents were prepared using laser cladding method. Electrochemical performances of the alloys were tested in 1 mol/L NaC1 solution and 0.5 mol/L H2SO4 solution,and the corresponding polarization curves were drawn. The results show that the high entropy alloys are columnar and equiaxed crystals, with the phase structure of fcc and hcc. The phase of fcc increases gradually with the increase of Co content in the alloys, enhancing intergranular corrosion and then reducing corrosion resistance of the alloys.

The band structures,electronic density of states, charge population and absorption spectra of Zn- doped anatase TiO2 with and without O vacancy were calculated using first-principles based on density functional theory. The results indicate that Zn-doped anatase TiO2 is indirect band gap semiconductor and O vacancy results in the downward shift of its conduction band and valence band bottom. The 3d orbit of Zn mainly contributes to the valence band bottom. Zn doping enhances the absorption ability of anatase TiO2 in most of visible light region and leads to its blue shift in ultraviolet light region. Meanwhile, O va- cancy impairs the absorption ability of Zn-doped anatase TiO2 in visible light region and strengthens its blue shift in ultraviolet light region.

To determine the optimum Zr content for improving low-temperature ducti effects of Zr concentration on the mechanical properties of NiAl were calculated and lity of NiAl alloy,the analyzed, using first- principle pseudopotential plane-wave method and based on virtual crystal potential function approximation. The results from the elastic modulus calculation and analysis show that with Zr molar content of about 0.01% ,Zr-alloyed B2-NiAl crystal has the maximum hardness and the lowest ductility. With Zr molar co- ntent of about 0.02%and 0.05% ,the crystal has the minimum hardness and the best ductility,respective- ly. Compared with pure NiA1 crystal, Zr-alloyed crystal has obviously-improved hardness with Zr molar content of 0.3 %- 0.45% ,and effectively-improved ductility with Zr molar content of 0.1%-0.45%.

The latest development of the preparation methods for W-Cu composite materials is reviewed, mainly including molten infiltration, chemical co-precipitation, mechanical alloying, hot-press sintering, co- reduction sintering, and sol-gel method. Meanwhile, the future development of W-Cu composite materials is pointed out.

由长沙有色冶金设计研究院有限公司设计、湖南华楚机械有限公司制造的国内首台锌电解多功能自动吊车，于2013年5月7日在云南驰宏锌锗股份有限公司会泽铅锌技改工程试运行成功。该项目得到了院领导的高度重视和支持，凝结了众多研发人员的辛苦劳动和集体智慧。

2013年4月2日，由中国有色金属工业协会主持的科技成果鉴定会在湖南顶立科技有限公司会议室召开。顶立科技副总经理羊建高教授就三项成果分别进行了介绍，与会专家听取汇报后审查了鉴定材料，经讨论、质询，鉴定委员会达成一致意见：“溶液法制备针状纳米氧化钨粉体材料工业化技术”项目研发的喷雾干燥和脱氨除水轻度还原等设备适应工艺要求，为针状纳米氧化钨粉体的生产提供了有效保障，

近年来，我国稀有金属工业发展迅速，对稀有金属精矿原料的需求呈逐年快速增长趋势，供需矛盾H益突出。我国虽然拥有丰富的稀有稀土矿产资源，但部分稀有金属资源现状并不理想，易选的单一矿物资源H趋减少，由于品位偏低或选冶困难而难以加以利用。随着我国高新技术的快速发展，稀有金属冶金及其应用技术也得到相应的快速发展。

A kind of low-cobalt sub-microcrystal cemented carbide （ωco= 6 %） was developed. The cemented carbide has the advantages of high hardness （HV30≥1 850）, high traverse rupture strength （TRS≥3.8 GPa）, good production process stability and so on. With the combination of high comprehensive performance of ultrafine-grained cemented carbide （d〈0.6 μm） and good production process stability of normal cemented carbide （d= 1-2 μm）, the developed cemented carbide can meet the needs for PCB processing industry and solid carbide tools.

Description is made of the analysis of the source and characteristics of chemical reaction heat waste heat from the tantalum and niobium metallurgy, focusing on the design scheme of waste heat recovery and utilization facility. Test results are discussed. Heat exchange is done fully based on the cold and hot media from the process in the design, to save the energy and reduce the waste emission during hy- drometallurgy.

Determination of high-content tellurium in commercial metallic tellurium and low-content tellur- ium in tellurium-enriched material was carried out by volumetric titration with potassium dichromate. The above method is suitable for tellurium determination of the materials containing 1 %-99.5 % tellurium.