刘文鹏
,
张庆礼
,
杨华军
,
周鹏宇
,
孙敦陆
,
高进云
,
谷长江
,
罗建乔
,
王迪
,
殷绍唐
量子电子学报
doi:10.3969/j.issn.1007-5461.2011.02.018
采用固相反应法制备了Bi3+、Eu3+、Tb3+掺杂的Lu3TaO7.测量了样品的X射线衍射谱、激发和发射光谱及荧光衰减曲线.三种离子掺杂的Lu3TaO7均呈现出强的荧光发射,其中Bi3+具有峰位在431 nm处的一强发射宽带,衰减寿命为16.8μs,Eu3+、Tb3+则表现出稀土离子的特征锐发射峰,衰减寿命分别为1.26 ms和1.20 ms.因此,它们均是具有潜在应用前景的重闪烁体材料.
关键词:
材料
,
闪烁体
,
Lu3TaO7
,
发光
Liang ZHEN Yuexian CUI Dezhuang YANG Department of Materials Science
,
Harbin Institute of Technology
,
Harbin
,
150006
,
ChinaShenglong DAI Guifu YU Beijing Institute of Aeronautical Materials
,
Beijing 100095
,
China
材料科学技术（英文）
The formation of precipitation free zone (PFZ) and its effect in a RSP AI-Li alloy has been studied. The results show that PFZ is easy to form when aged at 190℃,but there is no equilibrium phase on grain boundaries.The growth of PFZ in the alloy is different from that in conventional AI-Li alloys, The effect of PFZ is of great importance because of its large volume fraction in the alloy.It offsets the beneficial effect of RSP,and is thought to be an important factor that leads to the poor toughness and low ductility of RSP AI-Li alloy sheet.
关键词:
precipitation free zone
,
null
,
null
,
null
ZHANG Qianxiang
,
University of Science and Technologys Beijing
,
Beijing
,
China
金属学报(英文版)
Activities and activity coefficients of Al in solid Cu-AI alloys have been determined by meansof solid electorlyte galvanic cells Al(a_1 , in alloy), Al_2O_3 ZrO_2·Y_2O_3 Ni, NiOand Al(a_1, in alloy), Al_2O_3 Na, βAl_2O_3 Al(a_2 , in alloy), Al_2O_3
关键词:
Cu-Al alloy
,
null
,
null
,
null
,
null
王宝峰
,
胡恩安
腐蚀学报（英文）
低伤害、耐高温缓蚀剂AI-811是以咪唑啉季铵盐为主 体，并复合含S、含酮、含酰胺的混合成分，适用于HCl、盐酸/氢氟酸（HCl/HF）及醋酸等 有机混合酸液体系.其主要特点是高温缓蚀效果好，可预防或大大降低酸液对低渗储层的伤 害，使用浓度低，气味极小，与酸液中的其他添加剂配伍性好，适用性强，与缓蚀增效剂AI -800协同使用可在高达190℃下显示独特的优良缓蚀性能.
用CC-10-S高温高压动态腐蚀实验仪对AI-811的高温缓蚀性能进行了评价.结果表明：AI-811 及其AI-800在高温、高压、动态条件下对各种酸溶液具有很好的缓蚀效果，可使N-80油管 钢在高达190℃的储层温度下腐蚀速度大幅度降低，平均腐蚀速度<100 g/m2·h.
关键词:
酸化缓蚀剂
,
high temperature
,
corrosion
王宝峰
,
胡恩安
腐蚀学报（英文）
doi:10.3969/j.issn.1002-6495.2001.05.011
低伤害、耐高温缓蚀剂AI-811是以咪唑啉季铵盐为主体,并复合含S、含酮、含酰胺的混合成分,适用于HCl、盐酸/氢氟酸(HCI/HF)及醋酸等有机混合酸液体系.其主要特点是高温缓蚀效果好,可预防或大大降低酸液对低渗储层的伤害,使用浓度低,气味极小,与酸液中的其他添加剂配伍性好,适用性强,与缓蚀增效剂AI-800协同使用可在高达190℃下显示独特的优良缓蚀性能.用CC-10-S高温高压动态腐蚀实验仪对AI-811的高温缓蚀性能进行了评价.结果表明:AI-811及其AI-800在高温、高压、动态条件下对各种酸溶液具有很好的缓蚀效果,可使N-80油管钢在高达190℃的储层温度下腐蚀速度大幅度降低,平均腐蚀速度＜100 g/m2@h.
关键词:
酸化缓蚀剂
,
腐蚀
,
高温
Zhenming XU
,
Tianxiao LI
,
Da SHU
,
Yaohe ZHOU
材料科学技术（英文）
Electromagnetic filtration primary Fe-rich phases (complex compound of AlFeSiMn) from Al-Si alloy melt containing 1.2 wt pet Fe have been studied by theoretical analysis and on a self-designed electromagnetic filtration equipment. The principle of the electromagnetic filtration is that the EMF (electromagnetic force) scarcely acts on the primary Fe-rich phases having low electric conductivity, which are then moved in the direction opposite to that of the EMF. Experimental results show that the primary Fe-rich phases are separated from AI-Si alloy melt and are collected in the filter while the melt is in horizontal flow. The removal efficiency of the primary iron-phases (eta) calculated is less as the greatest flow velocity of the melt (u(M)) and the height of the filter (2h) are larger, while it becomes larger as EMF, operating distance of electromagnetic force (x) and particle size (d(p)) become larger. It has been confirmed that the primary iron-phases larger than 20 mum can be removed efficiently by theoretical analysis and experiments. This new technique is high efficient and available for continuously flowing melts as compared with natural settling and filtration methods, which offer a Possibility for recycling high quality aluminum alloys.
关键词:
李萍
,
郝静燕
,
谭家隆
,
王清
,
董闯
,
李丽
金属功能材料
本文系统地研究了结构驰豫对Cu58.1Zr35.9AI6块状非晶合金弹性性能的影响.将Cu58.1Zr35.9AI6非晶合金在150℃、300℃、450℃分别保温1 h.测量退火样品的纵、横波声速,并推算其弹性性能.结果表明:随退火温度的升高,声速与弹性性能呈现逐渐增加的趋势.低温驰豫时声速与弹性性能变化缓慢,高温驰豫时增加明显.基于结构驰豫谱模型分析了上述现象的产生在于:提高温度,原子有足够的条件进行中程与长程扩散,通过发生原子的积聚重排,大量自由体积的湮灭,使非晶样品的有序度得到大大的改善.
关键词:
结构驰豫
,
超声波速度
,
弹性性能
