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| 1 | INTERFACE REACTION IN MAGNETIC MULTILAYERS显示文摘Ta/NiO/NiFe/Ta multilayers were prepared by rf reactive and dc magnetron sputtering. The exchange coupling field (Hex) between NiO and NiFe reached 120Oe. The composition and chemical states at the interface region of NiO/NiFe were studied using the x-ray photoelectron spectroscopy (XPS) and peak decomposition technique. The results show that there are two thermodynamically favorable reactions at NiO/NiFe interface: NiO+Fe=Ni+FeO and 3NiO+2Fe = 3Ni+Fe2O3. The thickness of the chemical reaction as estimated by angle-resolved XPS was about 1-1.5nm. These interface reaction products are magnetic defects, and we believe that the Hex and the coercivity (Hc) of NiO/NiFe are affected by these defects. Moreover, the results also show that there is an 'intermixing layer' at the Ta/NiO (and NiO/Ta) interface due to a thermodynamically favorable reaction: 2Ta+5NiO=5Ni+ Ta2O5. This interface reaction has an effect on the exchange coupling as well. The thickness of the 'intermixing layer' as estimated by XPS depth-profiles was about 8-10nm. | G.H. Yu, M.H Li, F. W Zhu, X.F. Cui and J.L. Jin ( Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China) ( State key laboratory for Advanced Metals and Materials, University of Science and Technology Beijing | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 47 |
| 2 | ION HEATING PROCESS DURING PLASMA IMMERSION ION IMPLANTATION显示文摘The research on plasma immersion ion implantation has been conducted for a little over ten years. Much is needed to investigate including processing technlogy, plasma sheath dynamics, interaction of plasma and surface, etc. Of the processing methods elavated temperature technique is usually used in PIII to produce a thick modified layer by means of the thermal diffusion. Meanwhile plasma ion heating is more recently developed by Ronghua Wei et al[1]. Therefore the temeperature is a critical parameter in plasma ion processing. In this paper we present the theoretical model and analysize the effect of imlantation voltage, plasma density, ion mass,etc on the temperature rise. | X.B. Tian, X.F. Wang, A.G. Liu, L.P. Wang, S. Y. Wang, B. Y. Tang and P. K. Chu 1)Advanced Welding Production & Technology National Key Laboratory, Harbin Institute of Technology, Harbin 150001, China 2)Department of Physics & Materials Science, City Uni | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 11 |
| 3 | RECIPROCATING EXTRUSION OF IN SITU Mg_2Si REINFORCED Mg-Al BASED COMPOSITE显示文摘Mg2Si 增强了与硅的高数量合成的基于的 Mg-Al 被永久模子扔准备,然后由互给渗出挤出(RE ) 在以后合成被 homogenization 热处理处理。在 Mg2Si 的形态学和机械性质上处理的 RE 的效果合成被调查,开发新方法精制 Mg2Si 阶段并且改进它的形状。结果证明 RE 在精制 Mg2Si 阶段是很有用的。处理的 RE 传递越多,精制效果将是越多更好。而且, Mg2Si 阶段的一致分发将是更多在合成。在以后合成被 RE 为 12 张通行证处理,大多数 Mg2Si 阶段是 equiaxed 与在 20 μ m 下面的小粒的直径,并且在矩阵一致地散布了合成。机械性质合成能被 RE 处理显著地增加,并且处于当演员组状态比那高得多。作为温度上升,张力的力量被减少。为为 12 张通行证处理的合成 RE,张力的力量,收益力量,和延伸是 325.9 MPa, 211.4 MPa,并且 3.3% 在房间温度, 288.2 MPa, 207.7 MPa,并且 7.8% ,分别地在 150 ° C。与在房间温度的性质比较,张力的力量和收益力量高并且仅仅在 150 ° C 在 11.6% 和 1.8% 减少。Mg2Si 增强了基于的 Mg-Al 合成在 150 ° C 拥有好热抵抗。到热的效果的优秀抵抗被归因于高融化温度和好 Mg2Si 阶段的好热稳定性,它一致地是分布式的在合成,并且有效地妨碍滑行的谷物边界和脱臼运动。 | Z.M. Zhang C.J. Xu X.F. Guo S.Z. Jia | 2008 | Acta Metallurgica Sinica(English Letters)2008，21，3： | 8 |
| 4 | MICROSTRUCTURE OF Mg-6.4Zn-1.1Y ALLOY FABRICATED BY RAPID SOLIDIFICATION AND RECIPROCATING EXTRUSION显示文摘以便探索方法准备高张力增强 quasicrystal 的镁合金,有 50-60 的厚度的很快团结的 Mg-6.4Zn-1.1 Y 镁合金的薄片嗯被 melt 旋转获得单个压路机的设备,和薄片然后被互给处理成杆挤出和直接挤出。合金的微观结构被光显微镜和 SEM 分析,并且成分阶段被 XRD 识别。阶段转变和它的发作温度被微分热分析器(DTA ) 决定。分析结果证明为 Mg-6.4Zn-1.1Y 合金的快速的团结能禁止最容易溶解的反应,在 a-Mg 溶质答案拓宽 Zn 的稳固的溶解度,并且阻碍 Mg3 Y2 Zn3 和 MgZn2 混合物的形成,并且因此帮助从 melt 直接形成的 icosahedral Mg3 YZn6 quasicrystal。薄片的 mierostrueture 由 a-Mg 固体答案和 icosahedral Mg3 YZn6 quasierystal 组成。稠密的杆能由二通行证的互给的挤出和直接挤出由薄片制造。在在杆的薄片之间的接口能完美地被焊接并且连接。在互给的挤出和直接挤出过程期间,更多的 Mg3 YZn6 混合物被猛抛并且一致地散布了,而杆拥有从很快团结的薄片继承的好微观结构。杆包含仅仅二个阶段:是的 amagnesium 固体答案矩阵和在矩阵一致地分散的好 icosahedral Mg3 YZn6 quasicrystal。 | Z.M. Zhang C.J. Xu X.F. Guo | 2008 | Acta Metallurgica Sinica(English Letters)2008，21，1： | 7 |
| 5 | MICROSTRUCTURE OF BINARY Mg-Al EUTECTIC ALLOY WIRES PRODUCED BY THE OHNO CONTINUOUS CASTING PROCESS显示文摘在直径的约 5 公里的方向性地团结的二进制 Mg-Al 最容易溶解的合金电线被 Ohno 生产连续的扔( OCC )进程和微观结构是 examined.It 被发现电线拥有沿着它的轴的 direction.The 微观结构特征的明显的单向性的生长,这由源于竞争生长的平行圆柱的谷物组成 equiaxed 谷物在圆柱的谷物包括的哑巴 bar.Each 的头上团结了常规最容易溶解的 -Mg 和 -Mg17 | Z.M. Zhang T. Lü C.J. Xu X.F. Guo | 2008 | Acta Metallurgica Sinica(English Letters)2008，21，4： | 7 |
| 6 | Preparation of New Poly Silicate Iron Coagulants and Their Coagulation Property on Micro-polluted Water显示文摘 | L.P. Wang X.F. Yan X. XU A.B. Xu H. Qi Z.D. Zou N.Y. Gao | 2011 | Journal of Environmental Science and Engineering2011，5，1： | 6 |
| 7 | EFFECTS OF DIFFERENT FUNCTIONAL GROUP-CONTAINING ORGANICS ON MORPHOLOGY-CONTROLLED SYNTHESIS OF SILVER NANOPARTICLES AT ROOM TEMPERATURE显示文摘Silver nanoparticles with average particles sizes ranging from 2 to 131nm were manipulatively synthesized starting from silver nitrate using different functional group-containing organic modifiers at room temperature. The effects of the organic modifiers on the morphology of the resulting silver nanoparticles were strongly dependent on the intrinsic properties of the functional groups and the reducibility of the reductant. Numerous ether bonds (-O-) present in polyethylene glycol and Tween-80 were beneficial to the formation of silver nanoparticles with particle sizes of several nanometers in a narrow size distribution in both weak and strong reducing environments. Cetyltrimethylammonium bromide induced the formation of nanosized silver triangle plates in a weak reducing environment. The crystal growth of the silver nanoparticles with particle sizes of more than 10nm was postulated through an adhesion process of small-sized particles followed by a subsequent coalescence process under the present reaction conditions. | A.L. Wang H.B. Yin M. Ren X.N. Cheng Q.F. Zhou X.F. Zhang | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，5： | 5 |
| 8 | EFFECT OF Si ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF THE Al-4.5%Cu ALLOYS显示文摘The effect of Si on the microstructure and mechanical properties of binary Al-4.5%Cu alloy has been investigated. The results show that the addition of Si does not have any effect on alloy strength; however, it decreases the ductility of the as-cast Al-4.5%Cu alloy. It is obvious that after T4 heat treatment, the microstructure and mechanical properties of Al-4.5%Cu-Si alloys are improved, especially for the alloy with an Si addition of 2%. | N. Han, X.F. Bian*, Z.K. Li, T. Mao, and C.D. Wang Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061 China | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，6： | 5 |
| 9 | Influence of Re on the Properties of a NiCoCrAlY Coating Alloy显示文摘MCrAlY can serve as stand-alone overlay coatings or bond coats in thermal barrier coating systems, and its properties play a vital role in determining the performance of these coating systems. In order to further understand the behavior of MCrAlY coatings, several NiCoCrAlY model alloys with different levels of Re (0.3 wt%, 6 wt%, and 9 wt%) were investigated. Microstructural observation showed the addition of Re promoted the precipitation of Cr-rich phases, such as α-Cr and σ. The presence of α-Cr lowered the coecient of thermal expansion (CTE) of the coating alloys, which could reduce the CTE mismatch at the scale-metal interface. The solid solution strengthening effect of Re is responsible for an increase in Rockwell hardness of the coating alloys. But the isothermal oxidation resistance at 1100oC was deteriorated due to the precipitation of brittle α-Cr phase, a phase of inferior oxidation resistance compared with β-NiAl and γ-Ni. | J.J. Liang H. We Y.L. Zhu X.F. Sun Z.Q. Hu M.S. Dargusch X.D. Yao | 2011 | Journal of Materials Science & Technology2011，27，5： | 5 |
| 10 | MANUFACTURING OF ALUMINUM/FLY ASH COMPOSITE WITH LIQUID REACTIVE SINTERING TECHNOLOGY显示文摘The Al/fly ash composites are fabricated by liquid reactive sintering P/M process withfly ash particles as intensifying phases. The reactivity and newly formed phases dur-ing liquid sintering process have been analyzed by combing Thermochemical data basecalculation and XRD characterization. The results show that some of constituents infly ash have reacted with liquid aluminum so that the elemental Si, Fe, Ti as well assome amount of intermetallic compounds occur. The properties of aluminum/fly ashcomposites have been improved. With the fraction of fly ash increase, the compositedensity decreases; the hardness and the modulus of the composite increases, and thecomposite wear resistance are significantly increased. The fly ash reinforced compos-ires represent a sort of low cost product with possible widespread applications in theautomotive, small engine, and electromechanical machinery sectors. | X.F. Zhang, D.J. Wang and G. XieThe Faculty of Material and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China | 2002 | Acta Metallurgica Sinica(English Letters)2002，15，5： | 5 |
| 11 | EFFECTS OF MICROSTRVCTURE ON FATIGUE CRACK GROWTH BEHMIOR IN Ni-BASE SUPERALLOY GH586显示文摘Threshold stress values, muging from ~8 to 16MPa·m1/2 can be obtained in a Ni-base alloy GH586 by varying the microstructure through heat treatments. The threshold and low crack growth rate behaviors at room temperature, with varying groin size and γ’-distribution, have been investigated. The results indicate that grain size is an important microstructurol parameter that affects fatigue crack growth threshold and propagation behaviors, as the values of △Kth increase with increasing grain size, but the γ’ -distribution also has important effect. Analyses show that the effects of groin size on threshold and low crack-growth rate behavior result from heterogeneous deformation and roughness-induced crack closure due to crystallographic slipping and cracking in coarse microstructure. The higher △Kth and lower fatigue crack growth rate with increasing amounts of fine γ’ phases are closely related to less damage accumulation level in deformation zone of crack-tip resulted from heterogeneous deformation due to dislocations’ shearing γ’ precipitates. | S.S. Xie X.F. Pan T.L. Wang Z.X. Wang H.C. Yang and Q. Wang ( School of Materials and Metallurgy, Northeastern Universityl Shenyang 110006, China)( School of Materials and Metallurgy, Northeastern Universityl Shenyang 110006, China)( School of Materia | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，3： | 5 |
| 12 | Analytical Investigation of Prior Austenite Grain Size Dependence of Low Temperature Toughness in Steel Weld Metal显示文摘Prior austenite grain size dependence of the low temperature impact toughness has been addressed in the bainitic weld metals by in situ observations.Usually,decreasing the grain size is the only approach by which both the strength and the toughness of a steel are increased.However,low carbon bainitic steel with small grain size shows a weakening of the low temperature impact toughness in this study.By direct tracking of the morphological evolution during phase transformation,it is found that large austenite grain size dominates the nucleation of intragranular acicular ferrite,whereas small austenite grain size leads to grain boundary nucleation of bainite.This kinetics information will contribute to meet the increasing low temperature toughness requirement of weld metals for the storage tanks and offshore structures. | X.F. Zhang P. Hall H. Terasak M. Sato Y. Komizo | 2012 | Journal of Materials Science & Technology2012，28，3： | 4 |
| 13 | TWO-DIMENSIONAL NUMERICAL ANALYSIS OF PLASMA IMMERSION ION IMPLANTATION OF CYLINDRICAL BORES显示文摘Plasma immersion ion implantation (PIII), unrestricted by sight-light process, is considered a proper method for inner surface strengthening. Two-dimensional simulation oj inner surface PIII process of cylindrical bores were carried out in this paper using cold plasma fluid model, and influence of the bore’s dimension on impact energy, retained dose and uniformity of inner surface were investigated. | A. G. Liu,X.F. Wang, L.P. Wang, S. Y. Wang, B. Y. Tang and P.K. Chu 1) Advanced Welding Production Technology National Key Laboratory, HIT, Harbin 150001, China 2) Department of Physics and Material Science, City University of Hong Kong, 83 Tat Chee Aven | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 4 |
| 14 | A CLASS OF FACTORIZED QUASI-NEWTON METHODS FOR NONLINEAR LEAST SQUARES PROBLEMS显示文摘This paper gives a class of descent methods for nonlinar least squares solu-tion. A class of updating formulae is obtained by using generalized inverse matrices.These formulae generate an approximation to the second part of the Hessian ma-trix of the objective function, and are updated in such a way that the resultingapproximation to the whole Hessian matrix is the convex class of Broyden-like up-dating formulae. It is proved that the proposed updating formulae are invarantunder linear transformation and that the class of factorized quasi-Newton methodsare locally and superlinearly convergent. Numerical results are presented and showthat the proposed methods are promising. | C.X. Xu X.F. Ma M.Y. Kong(Department of Mathematics, Xi’an Jiaotong University, Xi’an, China) | 1996 | Journal of Computational Mathematics1996，14，2： | 4 |
| 15 | EFFECT OF ANNEALING ON DAMPING CAPACITIES OF AS-CAST ZA27 ALLOY显示文摘ZA27 alloy was prepared by casting with permanent mold and then annealed at 250℃ for 1-4h. The damping capacity of the alloy was measured using a testing apparatus based on the cantilever beam technique. It was found that the as-cast ZA27 alloy possesses high damping capacity with the value of 1.3 × 10-3 at 320Hz. After annealed at 250℃ for 1h, the damping capacity decreases to 1.1 × 10-3 and then remains constant even when the annealing time is increased to 4h. The microstructure of the as-cast ZA27 alloy consists of large dendrites of Al-rich primary (?)-phases, eutectoid (?) and nonequilibrium eutectic phases (?). After annealing at 250℃ for 1h, the (?)phase disappears due to dissolution into the matrix, and the spacing between the flakes of eutectoid increases. The further increase in the annealing time has little effect on the spacing. The damping mechanism of the alloy was discussed considering the thermoelastic damping and defect damping. The value of thermoelastic damping accounts only for 7%-8% in the overall damping in cantilever beam damping measurements and the damping capacity of the ZA27 alloy came mainly from defect damping. | Z.M. Zhang J. C. Wang H.Z. Liu X.F. Guo | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，5： | 3 |
| 16 | ON THE MONTE CARLO SIMULATION OF NORMAL GRAIN GROWTH显示文摘微观结构和他们正常谷物生长的动力学与相对数字和 n=0.5 的理论正常谷物生长代表一起用不同蒙特卡罗( MC ) algorithms.Compared 被模仿, MC 算法的一些因素的效果, i.e.the 格子类型,选择格子地点的方法,并且为精力计算的邻居选择,在模拟上,谷物生长的结果被学习。回归的二个方法被比较,并且三参数的非线性的回归对适合有适当因素的更好的模型包括了的谷物生长 kinetics.A 更合适三角形的格子,随机选择的尝试的地点,和为精力计算的第一和第二位最近的邻居被获得。 | Y.T. Liu X.J. Guan X.M. Shen X.F. Ma L.J. Wang | 2008 | Acta Metallurgica Sinica(English Letters)2008，21，4： | 3 |
| 17 | STRUCTURAL EVOLUTION OF UNDERCOOLED SINGLE-PHASE Ni-2wt%Pb MONOTECTIC ALLOY显示文摘The structural evolution of undercooled single-phase Ni-2wt%Pb monotectic alloy was systematically investigated by using the method of molten glass denucleating combined with superheating cycle. Within the achieved undercooling range e of 22 to 280K, the solidification structure undergoes three changes at 22K, 88K and 187K, respectively. With the increase of undercooling, common dendrites, the first class granular grains, nudercooled dendrites and the second class granular grains come out one after the other. Analytical results show that the granulation mechanism of the first class granular grains is owing to dendrite remelting and recrystallization, and the second is owing to dendrite break-op and recrystallization. | H.X. Zheng, H. Xie and X.F. Guo (Xi’an University of Technology, Xi’an 710048, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，1： | 3 |
| 18 | Measurements of γ/γ' Lattice Misfit and γ' Volume Fraction for a Ru-containing Nickel-based Single Crystal Superalloy显示文摘A conventional X-ray diffractometer has been used to determine the γ/γ lattice misfit and γ volume fraction for a Ru-containing nickel-based single crystal superalloy at room temperature.The rocking curve was used to characterize the distribution of subgrains.The diffraction peaks obtained by ω-2θ scan were used to determine the γ/γ lattice misfit and γ volume fraction.A three peaks fitting model was proposed.The peak fitting results are in good agreement with the model.The X-ray diffraction results indicate that the nickel-based single crystal superalloy was not a perfect monocrystalline material,which is comprised of many subgrains;and each subgrain also consists of large numbers of mosaic structures.In addition,two anomalous reflection phenomena were found during the experiment and discussed with respect to their occurrence and impact on the measurement.The experimental results show that the γ/γ lattice misfit and γ volume fraction will be various at the different regions of its dendritic microstructure.The average γ/γ lattice misfit and γ volume fraction of the experimental alloy are approximately-0.2% and 70%,respectively.Furthermore,the γ volume fraction calculated by atom microprobe(AP) data is also basically consistent with the experimental results. | X.P. Tan J.L. Liu X P Song T. Jin X.F. Sun Z.Q. Hu | 2011 | Journal of Materials Science & Technology2011，27，10： | 3 |
| 19 | Effects of conservation tillage on corn and soybean yield in the humid continental climate region of Northeast China显示文摘 | Y. Chen S. Liu H. Li X.F. Li C.Y. Song R.M. Cruse X.Y. Zhang | 2011 | Soil & Tillage Research2011，，： | 3 |
| 20 | Effect of heat-treatment condition on crystallization behavior and thermal expansion coefficient of Li 2 O–ZnO–Al 2 O 3 –SiO 2 –P 2 O 5 glass–ceramics显示文摘 | A.X. Lu Z.B. Ke Z.H. Xiao X.F. Zhang X.Y. Li | 2007 | Journal of Non-Crystalline Solids2007，，28： | 3 |
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