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Chronological record of the Early Mesozoic underplating in the northern margin of North china—U-Pb chronometry of zircons in the Late Mesozoic andesite from Western Liaoning

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Progress in Natural Science:materials international 2007年第8期17卷 943-947页

作者： Shao ji'an~(1,2**) Zhang Hongfu~2 Liu Xiaoming~3 Li Zhitong~4 (1.School of Earth and Space sciences,Peking University,Beijing 100871,china 2.Institute of Geology and Geophysics and Key Laboratory of Mineral Resources,chinese academy of sciences,Beijing 100029,china 3.Key Laboratory of Continental Dynamics,Northwestern University,Xi'an 710069,china 4.Institute of Geology and Mineral Resources of shenyang,shenyang 110032,china) [a]School of Earth and Space sciences Peking University Beijing China [b]Laboratory of Mineral Resources Chinese Academy of Sciences Institute of Geology and Continental Dynamics Beijing China [c]Key Laboratory of Continental Dynamics Northwestern university Xi'an China [d]Institute of Geology and Mineral Resources of shenyang Shenyang China

Cathodoluminescence spectroscopic analysis of zircons in the uppermost sanukites of the early Cretaceous Yixian Forma- tion in Western Liaoning reveals zoning structures of the zircons in the volcanic rocks. LA-ICP-MS chronometry shows that the central part of the zircons is remnant zircon with a U-Pb dating of 254 Ma,which is consistent with the age of the Early Mesozoic underplating granulites,and that the periphery is zircon crystallizing out of the host magma with a U-Pb dating of 116 Ma,which is highly consistent with the Ar-Ar dating of the host volcanic *** of the clinopyroxenes xenocrystals in the sanukites are similar to those of the clinopyroxenes in the underplating granulites,indicating that the granulites accreted to the lower crust in the Early Mesozoic have been reformed and disrupted by the upwelling diapers of the asthenosphere and taken part in formation of the sanukites in the Late Mesozoic.

关键词： northern margin of North china Mesozoic volcanic rock U-Pb chronometry of zircon underplating granulite

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Cluster-based composition rules for ternary alloy systems

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international Journal of Minerals,Metallurgy and materials 2007年第S1期15卷 1-3页

作者： Chuang Dong1, 2), Qing Wang1), Weirong Chen1), Qingyu Zhang1), Jianbing Qiang1), and Yingmin Wang1) 1) State Key Laboratory of materials Modification, Dalian University of Technology, Dalian 116024, china 2) international Center for materials physics, chinese academy of sciences, shenyang 110016, china

The cluster-based composition rule in ternary alloy systems including quasicrystals, bulk metallic glasses, crystalline phases and Lave phases-related body-centered cubic (BCC) solid solution forming systems was summarized. The so-called cluster line in a ternary phase diagram refers to a straight composition line linking a specific binary cluster to the third element. The compo- sition ranges of quasicrystals and bulk metallic glasses can be determined by the direct use of cluster lines, where two cluster lines intersect at the optimum phase forming composition. Furthermore, the alloys on the cluster line in Laves phase-related BCC solid solution alloy systems have larger hydrogen storage capacities.

关键词： cluster line composition design quasicrystals bulk metallic glasses hydrogen storage alloys

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Blue-shift of Nano-Y_2O_3 : Eu^(3+) Emission Spectra Excited by X-ray

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Journal of materials Science & Technology 1997年第4期13卷 351-353页

作者： Qiang LI Lian GAO and Dongsheng YAN(State Key Lab. of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics,chinese academy of sciences, Shanghai 200050, china) State Key Lab. of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Nano-Y_2O_3:Eu^(3+) powder was prepared by the homogeneous precipitation. With controlling the conditions of the reaction, nano powders with different grain size were obtained. It is found that the blue-shift phenomena exist in the nano-Y2O3:Eu3+ emission spectra excited by X-ray. The wave lengths of the peak (5D0→7F2) are related with the grain size of the powder

关键词： Eu Nano Emission Spectra Excited by X-ray Blue-shift of Nano-Y2O3

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Pressure-induced crystallite breaking in La_(0.7)Sr_(0.3)Mn_(0.9)Fe_(0.1)O_3 nanosolids

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chinese Science Bulletin 1998年第6期43卷 458-461页

作者： ZHENG Fanlei 1, 2, SUI Yu 1, 3, XU Dapeng 1 and SU Wenhui 1, 4 1. Department of physics, Jilin University, Changchun 130023, china 2. Changchun Institute of physics, chinese academy of sciences, Changchun 130021, china 3. Institute of Metal R Department of physics Jilin University Changchun Chinas Changchun Institute of physics Chinese Academy of Sciences Changchun China Institute of Metal Research Chinese Academy of Sciences Shenyang China international Center for materials physics Chinese Academy of Sceinces Shenyang China Center for Condensed Matter and Radiation physics CCAST (World Lab.) Beijing China

In the compacting process of the La 0.7Sr 0.3Mn 0.9Fe 0.1O 3 nanosolids under the pressure range of 0.0-4.5 GPa, the apparent pressure-induced crystallite breaking phenomenon in these nanosolids was observed. With increasing pressure up to 4.5 GPa, the average grain size decreases by 46% while the magnetization of nanosolids decrease by 40% and their coercive increases by 35%. This kind of breaking has a close relation to the existence of oxygen deficiency in La 0.7Sr 0.3Mn 0.9Fe 0.1O 3 nanoparticles. A simple and convenient method for preparing the bulk nanosolids with a large number of clean interfaces has been suggested.

关键词： nanosolid pressure-induced breaking high pressure.

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Effect of Nd on Microstructures and Properties of AZ31 Wrought Mg Alloy

Effect of Nd on Microstructures and Properties of AZ31 Wroug...

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Second international Conference on Magnesium(ICM 2006)

作者： Wei Qiu Enhou Han and Lu Liu Environmental Corrosion Center, Institute of Metal Research, chinese academy of sciences.shenyang, 110015,china shenyang National Laboratory for Material Science, Institute of Metal Research, chinese academy of sciences.shenyang,110015,Chinia

Addition of RE elements to Al-containing Mg alloys can improve properties of Mg alloys at elevated temperatures. In the present investigation, hot-extruded AZ31+x%Nd. (x=0.1,0.3,0.6and 1.0 wt%) wrought Mg alloy were prepared .The effects of Nd on microstructures and mechanical properties at room temperature of new alloy were investigated. The investigation found that Nd can bring about two kind of precipitation phases . One is AlNd phase, the other is AlNdMn phase, which were identified as Al11Nd3 and Al8NdMn4 by X-ray diffraction and TEM.

关键词： AZ31, Mg alloy, Nd elements, Extrusion, Mechanical properties

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Morphological evolution from aquatic to terrestrial in the genus Oreolalax(Amphibia,Anura,Megophryidae)

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Progress in Natural Science:materials international 2009年第10期19卷 1403-1408页

作者： Gang Wei a,b,c,Bin Wang c,Ning Xu b,Zizhong Lia,Jianping Jiang c,a Institute of Entomology,Guizhou University,Guiyang 550025,china b centre of Ecology,Guiyang College,Guiyang 550005,china c Chengdu Institute of Biology,chinese academy of sciences,Chengdu 610041,china [a]Institute of Entomology Guizhou University Guiyang 550025 China [b]centre of Ecology Guiyang College Guiyang 550005 China [c]Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041 China

A phylogeny of 17 species in the genus Oreolalax is reconstructed based on 21 morphological characters from adult specimens,skeleton specimens,tadpoles and *** species groups are recognized,of which the *** species group is the most primitive,the *** species group is the second,the *** species group is the third and the *** species group is the most recently *** on the evolutional tendency of the morphological characters on the phylogenetic tree,it is proposed that the evolution of tympanum,tympanic annulus,columella,spoon-like cartilage and the web between toes reflect the habit changes from aquatic to ***,Oreolalax is regarded as one important representative genus to study further the evolution of morphological characters from aquatic to terrestrial.

关键词： Aquatic Terrestrial Morphology Evolution Oreolalax

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A new interpolation method for Antarctic surface temperature

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Progress in Natural Science:materials international 2009年第12期19卷 1843-1849页

作者： Yetang Wang~(a,b),Shugui Hou~(b,c,*) a Monitoring centre of Ocean Environment of Shandong Province,Yantai 264006,china b State Key Laboratory of Cryospheric Science,Cold and Arid Regions Environmental and Engineering Research Institute, chinese academy of sciences,Lanzhou 73000,china c MOE,Key Laboratory for Coast and Island Development,School of Geographic and Oceanographic sciences,Nanjing University,Nanjing 210093,china [a]Monitoring centre of Ocean Environment of Shandong Province Yantai 264006 China [b]State Key Laboratory of Cryospheric Science Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 73000 China [c]MOE Key Laboratory for Coast and Island Development School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210093 China

We propose a new methodology for the spatial interpolation of annual mean temperature into a regular grid with a geographic resolution of 0.01°for Antarctica by applying a recent compilation of the Antarctic temperature data.A multiple linear regression model of the dependence of temperature on some geographic parameters(i.e.,latitude,longitude,and elevation) is proposed empirically,and the kriging method is used to determine the spatial distribution of regional and local deviations from the temperature calculated from the multiple linear regression *** modeled value and residual grids are combined to derive a high-resolution map of surface air temperature. The performance of our new methodology is superior to a variety of benchmark methods(e.g.,inverse distance weighting,kriging, and spline methods) via cross-validation *** simulation resembles well with those distinct spatial features of surface temperature,such as the decrease in annual mean surface temperature with increasing latitude and the distance away from the coast line; and it also reveals the complex topographic effects on the spatial distribution of surface temperature.

关键词： Surface temperature DEM Antarctica

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Monte Carlo模拟研究轰击诱发吉布斯偏析现象

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上海大学学报（自然科学版） 2003年第3期9卷 252-258页

作者：郑里平中国科学院上海原子核研究所

低温时,合金溅射的轰击诱发吉布斯偏析(bombardment-inducedGibbsiansegregation)现象,是在1982年首次发现的.我们建立了包括质量效应、键合效应和轰击诱发吉布斯偏析效应的MonteCarlo(MC)模拟程序;并对轰击诱发吉布斯偏析效应的两大特... 详细信息

低温时,合金溅射的轰击诱发吉布斯偏析(bombardment-inducedGibbsiansegregation)现象,是在1982年首次发现的.我们建立了包括质量效应、键合效应和轰击诱发吉布斯偏析效应的MonteCarlo(MC)模拟程序;并对轰击诱发吉布斯偏析效应的两大特征(第一是表面成分梯度特征,第二是表面成分梯度的中间性特征)作了研究.通过精确的定量计算得到了被轰击合金表面的成分梯度、溅射角分布和溅射产额具有中间性特征,并对其形成的原因作了理论的解释.

关键词：合金溅射轰击诱发吉布斯偏析 Monte Carlo模拟

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ZrO2 strengthened NiAl/Cr(Mo,Hf) composite fabricated by powder metallurgy

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Progress in Natural Science:materials international 2012年第3期22卷 231-236页

作者： L.Y. Sheng a,b, J.T. Guo c, T.F. Xi a,b, B.C. Zhang c, H.Q. Ye c a PKU-HKUST ShenZhen-Hong Kong Institution, Shenzhen 518057, china b College of Engineering, Peking University, Beijing 100871, china c Institute of Metal Research, chinese academy of sciences, shenyang 110016, china [a] PKU-HKUST ShenZhen-Hong Kong Institution Shenzhen 518057 China [b] College of Engineering Peking University Beijing 100871 China [c] Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The ZrO2 ceramic particles strengthened NiAl/Cr(Mo,Hf) composite was fabricated from the rapidly solidified NiAl/Cr(Mo,Hf) pre-alloyed powder and the ZrO2 powder by powder metallurgy technique. Microstructure examination revealed that in the prepared composite NiAl and Cr(Mo) phases distributed at the eutectic cell boundary become coarse but many Cr(Mo) platelets inside the eutectic cell were broken, which was different from the original powder. Moreover, fine Ni2AlHf and Hf solid solution particles distributed uniformly in the composite, and the ZrO2 particles mainly segregated along eutectic cell boundary. In addition, twin crystal and stacking faults were observed inside of ZrO2 grains. The experimental results showed that the ZrO2 ceramic particles strengthened NiAl/Cr(Mo,Hf) composite exhibited better room temperature and high temperature mechanical properties than the NiAl/Cr(Mo,Hf) alloy, which may be attributed to the fine structure and the strengthening effect of ZrO2 particles.

关键词： NiAl intermetallics NiAl/Cr(Mo) composite Powder metallurgy ZrO2 strengthening

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Wear properties of NiAl based materials

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Progress in Natural Science:materials international 2012年第5期22卷 414-425页

作者： Jianting Guo a,Zhensheng Wang b,Liyuan Sheng c,d,Lanzhang Zhou a,Chao Yuan a,Zhigang Chen b,Li Song b a Institute of Metal Research,chinese academy of sciences,shenyang 110016,china b Hunan University of Science and Technology,Xiangtan 411201,china c College of Engineering,Peking University,Beijing 100871,china d Shenzhen Institute,Peking University,Shenzhen 518057,china [a] Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China [b] Hunan University of Science and Technology Xiangtan 411201 China [c] College of Engineering Peking University Beijing 100871 China [d] Shenzhen Institute Peking University Shenzhen 518057 China

The NiAl based materials including NiAl-TiC-Al2O3 composite,NiAl-Cr(Mo)-Hf-Ho eutectic alloy and NiAl-Cr(Mo)-CrxSy in situ composite were fabricated and their wear properties were tested at different *** results revealed that the NiAl-TiC-Al2O3 composite,NiAl-Cr(Mo)-Hf-Ho eutectic alloy and NiAl-Cr(Mo)-CrxSy in situ composite exhibited the excellent wear properties between 700℃ and 900℃.The microstructure observations exhibited that the self-lubricant films formed on the worn surfaces during the dry sliding test at high temperature,which decreased the wear rate and friction coefficient *** observation on the self-lubricant film revealed that it was mainly comprised by ceramic amorphous and *** with the NiAl-TiC-Al2O3 composite,the NiAl-Cr(Mo)-CrxSy in situ composite has lower friction coefficient at low *** phenomena may be ascribed to the addition of sulfide which contributes much to the formation of self-lubricant,and moreover the TiC addition increase the strength of NiAl based material and its wear resistance.

关键词： NiAl based materials Microstructure Wear properties Self-lubrication Lubricate film

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