材料期刊网

The Behavior of Rare Earths in Steel

YU Jingsheng , YU Zongsen , WU Chengjian Ministry of Metallurgical Industry , China. Beijing University of Iron and Steel Technology.

材料科学技术（英文）

This review paper outlines recent progress in the application of rare earth metals (RE) in steel to improve the mechanical properties of steel. It includes: the physical chemistry of RE in steel; comparison of the application of RE and Ca in steel; the ways of adding RE into steel and nozzle blockage; the solid solubi- lity limit of RE in Fe and the amount of RE soluble in steel; the segregation of RE on grain boundaries of steel and its reaction with other elements; the effect of RE on the structure and mechanical properties of steels; the reaction of RE with H in steel.

关键词: rare earths , null , null , null

Behaviour of Rare Earths in Low Sulphur Steel

Qin LIN+ , Aisheng LIU , Wen YE , Zongsen YU , Dept. of Physical Chemistry , University of Science and Technology Beijing , Beijing , 100083 , China

材料科学技术（英文）

In steels 16Mn and X60 with low S content (0. 003～0. 005%), rare earth metals (REM) still show ef- fects on purifying the molten steel and controlling the sulphide morphology. The optimum ratio of RE/S is about 2. 0, which causes lower content of oxygen and inclusions and higher impact toughness. The amount of REM in solid solution in the steel was determined by means of inductive coupling plasma (ICP) spectroscopy. The dissolved REM in low S steel could decrease the propor- tion of pearlite and increase the strength of the steel.

关键词: rare earths , null , null

Lu2O3和Lu2O3∶Eu3+单分散球形粉体合成及其荧光性能研究

马畅 , 李晓东 , 董宇 , 刘绍宏 , 朱琦 , 李继光 , 霍地 , 孙旭东

中国稀土学报 doi:10.11785/S1000-4343.20130411

以Lu(NO3)3和尿素为原料,采用均相沉淀法合成镥盐前驱体,研究Lu3+浓度、尿素/Lu3+摩尔比R对前驱体形貌的影响.结果表明,在反应温度为95℃时,低Lu3+浓度有利于单分散球形粉体的合成,并且适当的调整R值可将单分散球形颗粒尺寸控制在180 ～ 270 nm之间.在此基础之上,研究Eu3+掺杂Lu2O3单分散球形荧光粉体的合成,探讨了Eu3+的掺杂量(1％,3％,5％,7％,9％(原子分数))及煅烧温度(600～ 1200℃)对颗粒形貌及其荧光性能的影响.结果表明,Eu3+的掺杂使所得(Lu,Eu)盐前驱体颗粒尺寸远小于单纯的Lu盐前驱体,且Eu含量对荧光粉的荧光强度有着显著的影响,荧光淬灭浓度为5％.在考察的煅烧温度范围内,荧光粉的荧光强度随煅烧温度的提升而增强.

关键词: Lu2O3 , Eu3+ , 均相沉淀 , 单分散球形 , 前驱体 , 荧光性能 , 稀土

Preparation of Scandium-Bearing Master Alloys by Aluminum-Magnesium Thermoreduction

姜锋 , 白兰 , 尹志民

稀土学报(英文版)

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Kondo effect on electrical properties of TmIn3

稀土学报(英文版) doi:10.1016/S1002-0721(08)60317-8

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Improving Corrosion Resistance of Stainless Steel by Yttrium Addition: An AES Analysis

稀土学报(英文版)

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Investigation of Formation and Inhibition Mechanism of Cerium Conversion Films on Al 2024 Alloy

邵敏华 , 黄若双 , 付燕 , 林昌健

稀土学报(英文版)

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Study on Anticoagulation Factor I from Agkistrodon Acutus Venom by Rare Ea rth Ion Probes

徐小龙 , 刘清亮 , 解永树

稀土学报(英文版)

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Synthesis and Application of Lanthanide Complexes with Schiff Base of Pridoxylidence-Glycine

黄晓华 , 周青 , 王玉红 , 王云翔 , 李奚 , 王小锋 , 李邨

稀土学报(英文版)

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Effect of Rare Earths on Mechanical Properties and Microstructure of TiCN/Al2O3 Ceramics

稀土学报(英文版)

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