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| 1 | In Search of the Cretaceous-Tertiary Boundary in Heilongjiang River Area of China显示文摘Abstract A new geological section recognized in Baishantou of Jiayin, Heilongjiang Province, China, was studied preliminarily in searching for the K/T boundary. An early Paleocene florule characrerized by abundant Tiliaephyllum tsagajanicum leaves and its associated plants, was collected from the Baishantou Member (new member representing the lower part of the Paleocene Wuyun Formation) overlying the possible K/T boundary. A tuff bed was found from the upper part of the Furao Formation (uppermost Cretaceous) in this section. The new findings imply that the K/T boundary is probable lying in the interval between the base of the Baishantou Member and the tuff bed, based on the correlation of the present strata with the stratotype of the Tsagajan Group spanning the K/T boundary in 'Belaya Gara' of the Bureya Basin, Russia. The early Paleocene florule from the Baishantou Member and the early-middle Maastrichtian dinosaurs found from the Yuliangzi Formation underlying the Furao Formation suggest that the Baishantou section is more promising for searching for the K/T boundary in this area. Further studies of the section is needed, integrating paleontological, biostratigraphic, geochemical, paleomagnetic, and sedimentary research would benefit our understanding the mass extinction event and biotic recovery in the Heilongjiang River area, China, and even all of northeast Asia during the K/T boundary interval. | Sun G. M.Akhmetiev Dong Z.M. A.R.Ashraf Sun Y.W. E.Bugdaeva D.L.Dilcher L.Golovneva I.Harding K.Johnson T.Kezina T.Kodrul LU J.S. V.Markevich H.Nishida H.Okada Park S.O. Sun C.L. Xiong X.Z. Xing Y.L. Zhou Z.L. | 2002 | Global Geology2002，7，2： | 13 |
| 2 | VALENCE ELECTRON STRUCTURE OF HIGH PROPERTY HIGH SPEED RESISTANCE STEEL AND ITS COMPOSITION DESIGN显示文摘Theempiricalelectrontheory of solidsand molecules( EET) and theimproved TFDtheory wereapplied tocalculatethe phasestructurefactorsand interfaceconjunction factorsofcom mon alloying elementsin high speed impact resistance ( HSIR) steel. According tothese va lenceelectron structure parametersitis deduced thatthe alloying elements of high propertyHSIRsteelshould be Mn, Cr, Ni and Mo. The microscopicstructure ofthesteel with this compositionisthe mixtureof martensite, bainiteand austeniteafter quenching andlow tem peraturetempering.Itspropertiesare:σb = 1750 MPa,σ0 2 = 1460 MPa,δ5 = 12 7 % , AKV(at 40 ℃, cross direction) = 21J, which exceed the requirement of design. For the thick plateof high property HSIRsteel,itissuggestedto add alittleamountof Cu on thebasisofabovecomposition . | Z.L. Li1,2) ,C.X.Ma2) and Z.L.Liu1) 1) Department of Materials Science and Engineering,Liaoning Institute of Technology,Jinzhou 121001 ,China 2) Collage of Science, Northeast University ,Shenyang,110006 , China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，4： | 8 |
| 3 | EXPERIMENTS AND SIMULATIONS OF A NEW DEVELOPED FORMING TECHNOLOGY-SHEAR-EXTRUSION PROCESS OF COMPONENTS WITH BRANCHES显示文摘Shear-extrusion process and its forming parumeters are proposed, whilst its laborsav- ing characteristic is utilized to forge large-size shutoff valve body on middle-due press. This new process is intended for the manufacture of large-size forged tubular components with branches on middle-due press. Experiments are carried out and processing parameters are obtained regarding the shear-extrusion process of a large-size shutoff valve body. Daformation and metal flow in the shear-extrusion process are inves- tigated. In orber to verify the laborsaving characteristic of this new process some contrastive experiments of extrusion force are performed between shear-extrusion and upsetting-extrusion for forming tubular components with branches. Based on rigid plastic FEM a plane-stain model is established to analyze shear-extrusion process of tubular components with branches. The analysis results by 2-dimensions PEM are comparatively quite well consistent with those of experiments. Both simulated and experimental results show that this new forming process is feasible for forging large-size tubular components with branches on middle-due press. | H.L. Yang, D.C. Kang, Z.L. Zhang, X.H. Piao and Z.D. Shi (National Die and Mold CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030, China) (School of Materials Sci. & Eng., Harbin Institute of Technology, Harbin 150001, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，3： | 6 |
| 4 | Experimental Study on Hydrothermal Drying for Sewage Sludge in Large-Scale Commercial Plant显示文摘 | Z.L. Jiang D.W. Meng H.Y. Mu K. Yoshikawa | 2011 | Journal of Environmental Science and Engineering2011，5，7： | 6 |
| 5 | Mechanisms of High Coercivity in Ni/NiO Composite Films by Post Annealing显示文摘A coercivity as large as 2.4 kOe has been achieved in the Ni/NiO composite film after an annealing under a magnetic field of 10 kOe and an O_2 partial pressure of 0.001 torr.The coercivity was attributed to the strong exchange coupling of Ni and NiO.Small grain size of Ni and NiO was observed after the post-annealing.The enhanced coercivity is probably associated with the domain wall pinning by local energy minima,the distribution of Ni and NiO,and the domain structure in the interface of Ni/NiO generated under the presence of the magnetic field during the post-annealing. | J.B. Yi J. Ding Mansoor Bin Abdul Jalil B.H. Liu S. Thongmee J.H. Yin Z.L. Zhao | 2007 | 材料科学与工程学报2007，25，6： | 5 |
| 6 | INFLUENCE OF COLD ROLLING REDUCTION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF TWIP STEEL显示文摘The influence of cold rolling reduction on microstructure and mechanical properties of the TWIP (ttwinning induced plasticity) steel was investigated. The results indicated that the steel had better comprehensive mechanical properties when cold rolling reduction was about 65.0% and the annealing temperature was 1000℃. The tensile strength of the steel is about 640MPa and the yield strength is higher than 255MPa, while the elongation is above 82%. The microstructure is composed of austenitic matrix and annealing twins at room temperature, at the same time, a significant amount of annealing twins and stacking faults are observed by transmission electron microscopy (TEM). Mechanical twins play a dominant role during deformation, and result in excellent mechanical properties. | Z.L. Mi D. Tang Y.J. Dai H.Q. Wang S.S. Li | 2007 | Acta Metallurgica Sinica(English Letters)2007，20，6： | 5 |
| 7 | EFFECT OF Cu-Ni CONTENT ON THE CORROSION RESISTANCE OF(Cu-Ni)/(10NiO-90NiFe204)CERMET INERT ANODE FOR ALUMINUM ELECTROLYSIS显示文摘(Cu-Ni)/(10NiO-9ONiFe_2O_4)cermet inert anodes containing metal Cu-Ni 0,5,10, 15 and 20 wt pct were prepared and their corrosion resistance to Na_3AlF_6-Al_2O_3 melts was investigated.The results indicate that the content of metal Cu-Ni has little effect on the steady-state concentration of Ni in the electrolyte and the values could not be used to effectively differentiate their corrosion resistance.The steady-state concentration of Fe decreases from 304×10^(-6)to 168×10^(-6)and that of Cu increases from 21×10^(-6)to 71×10^(-6)with the content of metal Cu-Ni increasing from 0 to 20 wt pct.Post-examination shows that metallic phase Cu-Ni is corroded preferentially during electrolysis and many pores are left at the anode surface.Considering the corrosion resistance and electrical conductivity,the cermet containing metal Cu-Ni 5 wt pct should be selected and studied further. | Z.L. Tian Y.Q. Lai J. Li Y.X. Liu | 2008 | Acta Metallurgica Sinica(English Letters)2008，21，1： | 5 |
| 8 | HIGH STRAIN RATE SUPERPLASTICITY IN A SiC_w/2024Al COMPOSITE MADE BY SQUEEZE CASTING显示文摘In this paper,the superplastic characteristics of the beta-SiC whisker reinforced 2024aluminum composite, fabricated by squeeze casting and hot-rolling after extrusion were investigated. The compsite had a fine grain size of about 2μm, and exhibited a strain rate sensitivity of about 0.35 and a maximum elongation of 350% at an initial strain rate of 1.1×10-1s-1 at 803K. In addition, the superplastic deformation mechanisme of the composite were also examined. | X.J.Xu D. Zhang Z.L. Shi C.Z.Zhao and R.J. Wu (State Key Laboratory of Metal Matrir Composites, Shanghai Jiaotong University, Shanghai 200030, China) | 1998 | Acta Metallurgica Sinica(English Letters)1998，11，4： | 4 |
| 9 | Nitrogen fertilizer use in China – Contributions to food production, impacts on the environment and best management strategies显示文摘 | Z.L. Zhu D.L. Chen | 2002 | Nutrient Cycling in Agroecosystems (-)2002，，2： | 4 |
| 10 | AN IN SITU SURFACE COMPOSITE AND GRADIENT MATERIAL OF Al-Si ALLOY PRODUCED BY ELECTROMAGNETIC FORCE显示文摘Because of the different conductivities between the primary phase (low electric conduc tivity) and the metal melt, electromagnetic force scarcely acts on the primary phase. Thus, an electromagnetic repulsive force applied by the metal melt exerts on the pri mary phase when the movement of the melt in the direction of electromagnetic force is limited. As a result, the repulsive force exerts on the primary phase to push them to move in the direction opposite to that of the electromagnetic force when the metal melt with primary phase solidifies under an electromagnetic force field. Based on this, a new method for production of in situ surface composite and gradient material by electromagnetic force is proposed. An in situ primary Si reinforced surface composite of Al-15wt%Si alloy and gradient material of Al-l9wt%Si alloy were produced by this method. The microhardness of the primary Si is HV1320. The reinforced phase size is in the range from 40μm to 100μm. The wear resistance of Al-Si alloy gradient material can be more greatly increased than that of their matrix material. | Z.M. Xu, T.X. Li, Z.L. Zhu and Y.H. Zhou School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，5： | 3 |
| 11 | Regional nitrogen budgets for China and its major watersheds显示文摘 | G.X. Xing Z.L. Zhu | 2002 | Biogeochemistry2002，，1： | 3 |
| 12 | OXIDATION RESISTANCE OF NANOCRYSTAL ODS ALUMINIDE COATINGS PRODUCED BY PACK ALUMINIZING PROCESS ASSISTED BY BALL PEENING显示文摘Nanocrystal ODS (加强的氧化物分散) aluminide 涂层被球 peening 帮助的包装 aluminizing 过程在不锈钢和基于镍的超级合金上生产。纯艾尔粉末并且 1% 极其细小的 Y 2 O 3 粉末被球 milling 混合。极其细小的 Y 2 O 3 粉末在艾尔粒子被驱散。球 peening 焊接了艾尔粒子到底层上并且加速了 aluminide 涂层的形成。Nanocrystal ODS aluminide 涂层被外面的生长在低温度生产(在 600 ° C 下面) 在一短处理时间。涂层的形成上的操作温度和处理时间的效果被分析。SEM (扫描电子显微镜) , AFM (原子力量显微镜) ,版本(精力散 X 光检查光谱学) , XRF (X 光检查荧光分光计) 和 XRD (X 光检查衍射) 方法被使用调查涂层的微观结构。高温度的氧化测试被执行评估 ODS aluminide 涂层的氧化抵抗。 | Z.L. Zhan Y.D. He W. Gao | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，3： | 3 |
| 13 | MICROSTRUCTURAL STUDY OF Fe-Cr-Al/Al COMPOSITE COATINGS DURING OXIDATION AND SULFIDATION AT 900℃显示文摘The microstructure of a composite coating system,which was composed of an inner layer of Fe-Cr-Al and an outer layer of aluminum,was studied after it was respectively oxidized and sulfurdized at elevated temperatures. Apart from the Al2O3 scale formed on the surface,the microstructure of the composite coatings exposed at 900℃ in air for 4h was a three-layer structure. The first layer consisted of a solid solution of Cr and Fe in α aluminum and an intermetallic compound FeAl3,while the second layer was a single phase of the aluminide and the third layer still remained the same appearance as the original Fe-Cr-Al coating. The microstructural observation of the specimen tested at 850-900℃ at low oxygen pressure and high sulfur pressure for 576h revealed that the surface coatings of the specimen had transformed into a duplex structure containing an outer layer and a thicker aluminide layer beneath. X-ray diffraction results showed that the out layer was composed of Al2S3 and Al2O3 and that AlCrFe2 was the main phase composition of the aluminide layer,with a few of Al2S3 and Al2O3 accompanied. | Z.L. Zhang D.Y. Li X.Q. Dong | 2007 | Acta Metallurgica Sinica(English Letters)2007，20，2： | 2 |
| 14 | Measurements of evapotranspiration from eddy-covariance systems and large aperture scintillometers in the Hai River Basin, China显示文摘 | S.M. Liu Z.W. Xu Z.L. Zhu Z.Z. Jia M.J. Zhu | 2013 | Journal of Hydrology2013，，： | 2 |
| 15 | 氟化钙样物质的合成和检测的体外研究显示文摘牙釉质经氟化物处理后,表面生成“氟化钙样”的物质(“CaF_2-like”materials)。这种物质为量极少,且采集技术也有困难,故很难利用其作为防龋机理研究的样本。为获取代替牙面的氟化钙样物质,本研究采用化学合成的方法,制备了不同磷含量的氟化钙样物质,并分析、测定了这种物质在醋酸钾缓冲液中的溶解性能。对氟化钙样物质中磷与溶解性能的关系,作了定量的分析,并在其成分、溶解性、晶形结构等方面与纯氟化钙进行了比较。结果表明,用化学方法合成的氟化钙样物质,可以反应对牙面上氟化钙样物质的研究。本研究还验证了磷能使氟化钙样物质的结晶形态从立方晶形转变为微小的球滴状,溶解性随着磷含量的增加而加大。该实验是对氟防龋机理研究的一种方法。 | 郑睿 Ra.,Z.L. | 1995 | 中华口腔医学杂志1995，30，4： | 2 |
| 16 | Measurements of evapotranspiration from eddy-covariance systems and large aperture scintillometers in the Hai River Basin, China显示文摘 | S.M. Liu Z.W. Xu Z.L. Zhu Z.Z. Jia M.J. Zhu | 2013 | Journal of Hydrology2013，，： | 2 |
| 17 | Nitrogen fertilizer use in China – Contributions to food production, impacts on the environment and best management strategies显示文摘 | Z.L. Zhu D.L. Chen | | 0，2002，： | 1 |
| 18 | Synthesis and characterization of ultrafine well-dispersed magnetic nanoparticles显示文摘 | Z.L. Liu H.B. Wang Q.H. Lu G.H. Du L. Peng Y.Q. Du S.M. Zhang K.L. Yao | 2004 | Journal of Magnetism and Magnetic Materials2004，，2： | 1 |
| 19 | Thermal boundary resistance and temperature dependent phonon conduction in CNT Array Multilayer Structure显示文摘 | Z.L. Wang H.T. Mu J.G. Liang D.W. Tang | 2013 | International Journal of Thermal Sciences2013，，： | 1 |
| 20 | Fracture behavior of 9% nickel high-strength steel at various temperatures显示文摘 | W.S. Du R. Cao Y.J. Yan Z.L. Tian Y. Peng J.H. Chen | 2007 | Materials Science & Engineering A2007，，1： | 1 |
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