不同载荷下CuZnAl合金干滑动磨损性能研究

对CuZnAl（RE）形状记忆合金采用不同热处理工艺后,进行了干滑动磨损试验.在不同相变温度、不同载荷、不同磨损时间的条件下,做了CuZnAl（RE）形状记忆合金的干磨损试验,并与ZQSn5-5-5和ZQAl9-4做了对比,用电子扫描显微镜和X衍射仪对磨损表面和磨屑相组成进行了观察和检测.试验结果表明,晶粒细化与锻打能提高合金的耐磨性,合金的M相比β相耐磨,两级时效处理的合金耐磨性能优于分级淬火处理的合金.CuZnAL（RE）形状记忆合金的耐磨性优于ZQSn5-5-5和ZQAl9-4.CuZnAl（RE）形状记忆合金磨损机制主要为粘着磨损、剥离磨损和磨粒磨损.     

RE对Mg-8Zn-4Al-0.3Mn合金组织的影响

研究了RE对Mg-8Zn-4Al-0．3Mn铸造镁合金显微组织的影响。结果表明：Mg-8Zn-4Al-0．3Mn-χRE铸造镁合金的显微组织主要由口(Mg)基体、φ(Al2Mg5Zn2)相、r(Mg32(Al,Zn)49)相和Mg3Al4Zn2RE相组成。随RE加入量的增加，合金晶界上三元相的形态由半连续网状改变为颗粒状，三元相的分布逐渐变得弥散而均匀。晶界上针状或棒状Mg3Al4Zn2RE相的量也随着RE加入量的增加而增加。加入1．5％的RE可显著细化合金的铸态组织，晶粒大小由120～130μm减小到40-50μm。合金的显微硬度值随着RE加入量的增加而增加。     

一种基于UPPAAL的Web服务组合模型检测方法

Web服务组合的正确性验证对提高软件开发效率、实现服务增值具有重要意义。为从高层抽象层次研究Web服务组合的正确性及其形式化验证方法,考虑到Web服务组合中的实时特征,在采用软件体系结构描述语言XYG/ADL对Web服务组合进行描述的基础上,将其实时描述部分XYZ/RE转换至时间自动机模型,组合后系统应满足的性质用分支时序逻辑CTL公式表示,最后应用模型检测工具UPPAAL实现了Web服务组合正确性的自动化验证。     

奥氏体不锈钢中稀土的作用研究及应用前景

就稀土在奥氏体不锈钢的应用研究作简要综合评述。作为稀土资源的大国,开发具有我国资源特色新型高品质稀土不锈钢,具有十分重要的战略意义和很好的应用前景。     

基于LabVIEW的共振增强双光子电离-飞行时间质谱数据采集系统

在用共振增强双光子电离-飞行时间质谱技术在线检测多相催化反应的实验过程中，需要建立一套高速数据采集、处理及分析系统。该系统软件部分用图形化编程语言LabVIEW编写，可以完成对飞行时间质谱及其峰面积实时采集，适合于连续监测气相反应的变化过程。本文介绍了该系统的硬件组成和软件设计，并在实验过程中得到了较好的应用。在实时检测甲烷无氧芳构化反应的实验中，观察到了催化反应产物苯在诱导期间的变化。     

Mg-8Zn-4Al-0.3Mn-xRE合金的时效析出过程及其动力学

采用金相显微分析和DSC分析了Mg-8Zn-4A1-0．3Mn-x RE含金时效析出过程及其动力学，结果表明，未添加RE元素的Mg-8Zn-4A1-0．3Mn合金的时效析出过程为：过饱和固溶体→细小弥散析出相→再结晶软化和析出相的聚集长大；添加RE元素的Mg-8Zn-4A1-0．3Mn合金的时效析出过程为：过饱和固溶体→细小弥散析出相→析出相的聚集长大．人工时效后，与未加RE的合金相比，合金2，3，4显微硬度峰值提高分别达5．6％，9％，13．4％；随着RE元素含量的增加，合金的析出相形成激活能呈逐渐增大的变化规律．     

喷粉处理改善球化效果的试验研究

探讨了稀土镁球化剂在喷粉处理时的球化效果，进而对喷粉脱硫、球化、孕育综合处理工艺的球化效果进行了试验研究。结果表明：喷粉球化是一种有效的新球化方法，可获得低硫、低氧、石墨圆整而细小的铸态铁素体球墨铸铁。综合喷粉球化工艺可将脱硫剂、球化剂、孕育剂喷入铁水，完成脱硫、球化、孕育过程。获得的球铁在强度较高的同时，其延伸率和冲击值也很大，使铸态生产高韧性球铁成为可能。     

A Study of Modification of M2 Cast High Speed Steel

M2 cast high speed steel was inoculated by addition of rare earth(RE)‐Al‐N, network eutectic carbides were eliminated, matrix structures were refined and the segregation of tungsten and molybdenum elements were relieved. In the condition that the hardness did not decrease, impact toughness obviously increased. Quenching at 1180 °C and three‐times tempering at 560 °C, the hardness of M2 cast high speed steel kept 65~66HRC, impact toughness reached 21.3J/cm². Modified M2 cast high speed steel had excellent thermal fatigue resistance and high temperature wear resistance. Roll made in modified M2 cast high speed steel had excellent service effect using in slit rolling mill stand of hot rolling bar mill.     

Rare earth (RE) doped phosphors and their emerging applications: A review

The evolution of luminescent materials has witnessed rapid advancement in research and development. Solid inorganic light-emitting materials or phosphors are the optoelectronic material of the 21st century because of their power-efficient potential over various illumination sources, eco-friendliness and resourceful display perspectives. The inorganic phosphors have been extensively explored to meet the demand of low voltage stimulated lighting sources owing to increased global energy consumption. Due to environmental friendliness, advantages long lifetime, lower energy consumption, reliability and high luminous efficiency, modern white light-emitting diodes (WLEDs) have replaced less effective incandescent and mercury-enclosing conventional fluorescent lighting sources. This review highlights the developments in preparation, luminescence and potential perceptions of rare-earth activated phosphors for solid-state lighting technologies. The role of RE ions as an activator as well as a sensitizer in doped materials and possible transitions within their energy levels are reviewed in detail. The paper reviews the substantial influence of host lattices such as aluminate, oxide, phosphate, silicate, sulfide, etc on the optical transitions of doped RE ions. Studies on the advancement into the design of novel phosphors are very crucial as they will provide an opportunity to boom prospects in the course of promising applications. The sustainable energy facilities include clean technologies providing a cheaper lighting source which can produce significant indirect economic benefits via limiting the deforestation and use of scrubbing technology to mitigate air pollution.