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以PEG600为模板液相还原法制备片状铜粉
片状铜粉 PEG600 液相还原法
2009/11/4
采用液相化学还原法，在模板剂PEG600存在的情况下，以NaH2PO2为还原剂，制备了粒径10~40 mm、厚1.5~2.5 mm、表面光滑的片状超细铜粉. 考察了还原溶液pH值、反应温度、CuSO4浓度、PEG600加入量对片状铜粉的影响. 实验得出优化工艺条件为：CuSO4浓度0.2 mol/L, NaH2PO2浓度0.14 mol/L，模板剂PEG600加入量8 mL，温度80℃, pH 0...
以铝土矿尾矿为原料碳热法制取铝硅合金中生团块的性能
气孔率 单因素实验 正交实验
2009/11/4
探讨了一种用于测试铝土矿尾矿碳热法制取铝硅合金中生团块真密度的方法，并用容重法验证了其可行性. 在此基础上，以抗压强度和气孔率为指标，通过单因素实验和正交实验，考察了制团压力、干粉粘结剂含量、配水量、尾矿粒度对生团块性能的影响. 结果表明，获取优质生团块的最佳工艺条件为：制团压力22.5 MPa，干粉粘结剂含量9%(w)，配水量13%(w)，尾矿粒度0.42~0.178 mm. 此时生团块的抗压强...
中高浓度铝酸钠溶液硫酸钙深度脱硅
铝酸钠溶液 深度脱硅 机理
2009/11/4
以二水硫酸钙为脱硅剂对中高浓度的铝酸钠溶液脱硅进行了研究，分别考察了温度、时间、二水硫酸钙用量、搅拌速度及铝酸钠溶液苛性比ak对浓度为200, 180, 150 g/L的铝酸钠溶液脱硅效果的影响. 在95℃及ak=1.5、二水硫酸钙用量30 g/L、搅拌速度为867 r/min条件下脱硅2 h后，200 g/L铝酸钠溶液中硅量指数达到3815，180 g/L铝酸钠溶液中硅量指数达到4082，150...
Thermovision systems used to improve a technological process for hot-rolled copper and brass strips
Metallic Alloys Copper Brass
2010/1/19
Purpose: This paper contains description made on thermovision testing with the use of Inframetrics 760B system. Measurements were executed on the surface of a heat furnace and also on the surface of m...
Physical model of aluminium refining process in URC-7000
aluminium refining physical modelling
2009/10/23
The paper presents short characteristics of the most frequently used reactors for the continuous refining of aluminium and its alloys. Refining depends on the flow rate of refining gas. It influences ...
固体透氧膜法直接还原NiO-CeO2制备CeNi5合金
透氧膜 电解 储氢合金
2009/10/15
在CaCl2熔盐中, 利用固体透氧膜(SOM)法直接电解混合氧化物NiO-CeO2制备CeNi5合金, 并与熔盐电解法(FFC)进行了对比. 阴极的制作方法与FFC法相同, 阳极为碳饱和Cu(或Sn) 液, 采用只允许氧离子通过的透氧膜隔开阴极和阳极, 这样可以采用较高的电解电压 (3.5 V)以获取更高的电解速率. 研究了SOM法制备CeNi5合金的可行性和影响因素, 如电解温度、电解时间, 以...
Competitive Biosorption of Chromium(VI),Iron(III) and Copper(II) Ions From Binary Metal Mixtures By R.arrhizus and C. vulgaris
Waste water Heavy metal ions Competitive biosorption
2009/10/15
In this study, the simultaneous adsorption process of Cr(VI), Fe(III) by R. arrhizus and C. vulgaris and Cu(II) in pairs of metal mixtures were investigated and compared to single component systems. T...
Ageing Behaviour of Spray Cast Al-Zn-Mg-Cu Alloys
7xxx series aluminium alloys spray casting age hardening ageing precipitates TEM.
2009/10/13
Three 7xxx series aluminium SS70, N707 and 7075 alloys containing copper, zinc and magnesium were spray deposited using rapid solidification. Ageing of the 7075 alloy resulted in a peak hardnesses of ...
Effect of Alloying Elements to Aluminium on the Wettability of AL/SiC System
Wetting Sessile drop method Surface tension Aluminium alloys
2009/10/13
The wettability at a liquid Al-alloy/SiC interface was evaluated by the sessile drop method at 750C. The wetting angle, , of a sessile drop on SiC substrate decreased with the addition of Pb, Mg and...
Changes of Grain Sizes and Flow Stresses of AA2014 and AA6063 Aluminum Alloys at High Temperatures in Various Strain Rates
Aluminum alloys Plastic deformation Grain size True strain Compression head speed and True strain rate
2009/10/12
Changes in the grain sizes and flow stresses of AA2014 and AA6063 aluminum alloys subjected to
compression tests at high temperatures in various constant compression head speeds were investigated. Wh...
Intermetallic Phase Formation at Fe-Al Film Interfaces
Intermetallics Fe-Al system Thin films Interfaces
2009/10/9
An Fe-Al thin film system was studied for the purpose of examining the formation and development of intermetallic phases, which were formed at the aluminum (Al) film-steel substrate interfaces. Al fil...
热浸镀铝工艺及镀层分析
热浸镀铝 低真空处理 助镀剂 熔剂法
2009/9/29
在实验室条件下通过多次实验研究了采用熔剂法进行纯铁表面热浸镀铝的工艺及低真空处理方法,摸索出较为合理的工艺流程及筛选出合适的助镀剂和镀铝液表面熔剂,并简要分析了原因. 对影响镀层的几个工艺参数,如浸镀时间、温度等进行分析讨论,利用扫描电镜对其镀层进行成分和结构分析. 同时,对经过低真空处理的试样和没有处理的试样做了成分对比分析.
有色金属真空冶金进展
真空冶金 真空蒸馏 真空碳还原
2009/9/28
回顾了30年来有色金属真空冶金在理论和实践方面的一些进展,包括粗金属及合金(如Pb-Sn合金、锌-铁合金、铅银合金以及铋银合金等)的真空蒸馏分离、粗金属的精炼、矿石和冶金中间产物的真空处理以及金属氧化物在真空中的还原等.并扼要说明其作用和应当注意发展的若干方面.
不同基体真空蒸镀铝膜的附着力研究
真空蒸镀 铝膜 附着力 退火
2009/9/27
采用电阻加热式真空蒸镀法在玻璃、H13钢、塑料和纯铜基体上镀制铝膜,并对其附着力进行了测试和分析.结果表明:铝膜对基体的附着力随蒸镀时间的延长而增加,二者基本上呈线性关系; 在相同镀制工艺条件下,铝膜对玻璃、H13钢、纯铜和塑料基体的附着力依次增强; 在50～350℃之间退火后,铝膜对纯铜基体的附着力高于退火前,且随退火温度的升高而增大.
关键词: 真空蒸镀; 铝膜; 附着力; 退火