|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Microstructure of Carbides at Grain Boundaries in Nickel Based Superalloys显示文摘It is well known that carbides at grain boundaries play an important role in affecting mechanical properties of nickel based superalloys. In order to deeply understand the relationship between grain boundary structures and properties, in this work, we have investigated the microstructure of grain boundaries with different misorientation angles in bicrystals of nickel based superalloys. It is found that the bicrystals with smaller misorientation angles contain denser M 23 C 6 but sparse MC particles at grain boundaries, and this kind of bicrystals presents longer stress rupture lives. It was observed that MC carbides were decorated by M 23 C 6 and M 6 C particles at grain boundaries. The formation of these carbide particles, therefore, is likely due to the local fluctuation of chemical composition around MC carbides. In addition, the orientation relationships between MC carbides and γ/γ matrix were also determined. | Xiaoming Dong Xiaoli Zhang Kui Du Yizhou Zhou Tao Jin Hengqiang Ye | 2012 | Journal of Materials Science & Technology2012，28，11： | 4 |
| 2 | Strong interface contact between NaYF_(4):Yb,Er and CdS promoting photocatalytic hydrogen evolution of NaYF_(4):Yb,Er/CdS composites显示文摘To acquire efficient photocatalysts,it is necessary to make effective use of visible light/Near Infrared(NIR)light,which takes up a large percentage of sunlight.Integrating upconversion materials with visible light active photocatalysts has attracted much attention in this regard.The interface contact between upcon-version material and photocatalyst has potential influence on the properties and thus the performance of the system.In this work,NaYF_(4):Yb,Er/CdS composites of the upconversion material NaYF_(4):Yb,Er nanorods and CdS nanoparticles were synthesized by ion adsorption/precipitation process and were then annealed in an argon atmosphere at different temperatures to modulate the microstructures.The annealing pro-cess endows the crystal transformation of cubic CdS with low crystallinity to hexagonal CdS with high crystallinity and,importantly,good interface contact between NaYF_(4):Yb,Er and CdS.Consequently,the hy-drogen evolution activity greatly increases from 171 to 2539μmol h^(−1) g^(−1) under the light irradiation ofλ>400 nm,and from 0 to 19μmol h^(−1) g^(−1) under the light irradiation ofλ>600 nm.This work might provide a useful reference for the rational design of promising photocatalyst involving upconversion ma-terials. | Huaze Zhu Yongqiang Yang Yuyang Kang Ping Niu Xiangdong Kang Zhiqing Yang Hengqiang Ye Gang Liu | 2022 | Journal of Materials Science & Technology2022，，7： | 3 |
| 3 | Atomic-resolution studies on reactions between basal dislocations and {1012} coherent twin boundaries in a Mg alloy显示文摘Reactions between basal 〈a60〉 dislocations and {1012} coherent twin boundaries(CTBs) in a Mg alloy were studied with atomic resolution. Individual dislocation-CTB reactions produced steps with residual dislocations and multiple t winnin g dislocations(TDs) gliding away, consequently resulting in TB migration. Reactions between {1012} CTBs and low-angle grain boundaries composed of basal 〈a60〉 dislocations created either basal-prismatic/prismatic-basal interfaces or asymmetric tilt grain boundaries, depending on whether TDs gliding away or not. Not only the emission of TDs by dislocation-TB reactions may drive TB migration, but also the resultant steps or facets along TBs can act as TD sources to facilitate TB migration. Our results indicate that roughness or severe loss of local coherency induced by dislocation-TB reactions does not intrinsically impede TB migration in Mg alloys. Dislocation-TB reactions may provide another feasible strategy to improve the ductility of Mg alloys, in addition to other techniques like grain refinement and texture modification. | Huhu Su Xinzhe Zhou Shijian Zheng Hengqiang Ye Zhiqing Yang | 2021 | Journal of Materials Science & Technology2021，，7： | 3 |
| 4 | Phase Relations in TiAl+Nb System显示文摘The microstructures and phases of ternary TiAl+Nb alloys containing 50-60 at.-%Al, 0-21 at.-%Nb have been studied using transmission electron microscopy (TEM) and X-ray powder diffraction. The phases present in the alloys and their distribution were found to be a sensitive function of composition. The phase relations between γ-TiAl and γ1 (a new ordered ternary intermetallic compound based on γ-TiAl) were determined. Essentially single γ phase was determined for alloys with relativety low Nb content (≤10 at.-%Nb). the γ1 phase was determined to exist in the composition range containing higher Nb contents (15-21 at.-%Nb). Between γ and γ1 phases, with intermediate Nb contents there is a transitional phase γ1 (a superstructure of γ-TiAl). As for the influence of Al concentration on the phase relations. the γ1 phase was inclined to form in the alloys with relatively high Al contents. The ordering transformation of γ, to γ1 is a continuous ordering process and the transition may be second order. | Jingguo WANG Guoliang CHEN and Zuqing SUN (State Key Lab. for Advanced Metal Materials, University of Science and Technology Beijing, Beijing, 100083, China)Hengqiang YE (Lab. of Atomic Imaging of Solids, Institute of Metal Research, Academia Sinica, Sh | 1994 | Journal of Materials Science & Technology1994，10，5： | 3 |
| 5 | Stress Field of Non-equilibrium Grain Boundaries in Nano-crystalline Metals显示文摘Introducing the stress distribution near grain boundaries to improve the dislocation pileup model for the Hall-Petch (H-P) relation, the continuous distribution of dislocations in the pileup could be solved by means of Tschebysheff polynomials for the Hubert transformation. An analytical formula of the stress intensity factor for the dislocation pileup is obtained. The reverse H-P relation may be explained by the modified dislocation-pileup-model. | Chiwei LUNG and Enke TIAN International Centre for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China Hengqiang YE Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sci | 2001 | Journal of Materials Science & Technology2001，17，3： | 2 |
| 6 | STRAIN INDUCED STRUCTURAL TRANSITION OF INTERFACES AND TWINS IN A HOT-DEFORMED DUAL-PHASE TIAL ALLOY显示文摘STRAININDUCEDSTRUCTURALTRANSITIONOFINTERFACESANDTWINSINAHOT-DEFORMEDDUAL-PHASETIALALLOYCHENGuoFiang;WANGJinguo;ZHANGLichunand... | CHEN GuoFiang WANG Jinguo ZHANG Lichun and YE Hengqiang(State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, P. R. China Laboratory of Atomic Imaging of Solids, Institute of Metal Researc | 1995 | Acta Metallurgica Sinica(English Letters)1995，8，Z1： | 2 |
| 7 | First-principles calculation of crystalline materials genome: a preliminary study显示文摘The US President Obama launched the Materials Genome Initiative on June 24,2011,aimed at speeding up the pace of discovering,developing,manufacturing,and deploying advanced materials by at least twice as fast as is possible at present,at a fraction of the cost with the help of existing advanced computer technology.According to the authors’understanding to the event,this article will first give a brief discussion on the origin of material genome,its scientific implication,research significance,and the far-reaching influence of materials genome study to the developments of materials science and human society.Then,the subsequent contents will introduce the research progresses of the related works carried out by the authors’research group over the last decade,on the first-principles studies of crystalline materials genome.The highlights are focused on the method implementations for configuration optimization of lattice structure,first-principles calculations of various physical parameters on elastic,electronic,dielectric,and thermodynamic properties,and simulations of phase transition and particle transport in solids.The technical details for extending these methods to low-dimensional crystalline materials are also discussed.The article concludes with an outlook on the prospect of materials genome research. | Shaoqing Wang Hengqiang Ye | 2014 | Chinese Science Bulletin2014，59，15： | 2 |
| 8 | Zirconium-Induced Softening in Hyperstoichiometric Ni_3Al显示文摘The room temperature compressive properties and microhardness of Ni3Al alloys doped with Zr were studied. For the hypostoichiometric Ni3Al alloys, the compressive strength and microhardness increased with an increase in Zr content, while softening behavior induced by doping with a certain amount of Zr was observed in hyperstoichiometric Ni3Al alloy. Possible mechanisms for the softening effect were suggested. | Yufang LI, Jianting GUO and Hengqiang YE Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China | 2005 | Journal of Materials Science & Technology2005，21，2： | 2 |
| 9 | Microstructure, precipitates and compressive properties of various holmium doped NiAl/Cr(Mo,<ce:hsp sp='0.25'/>Hf) eutectic alloys显示文摘 | Liyuan Sheng Lijun Wang Tingfei Xi Yufeng Zheng Hengqiang Ye | 2011 | Materials and Design2011，，10： | 1 |
| 10 | Microstructure difference between core and skin of T700 carbon fibers in heat-treated carbon/carbon composites显示文摘 | Gengheng Zhou Yequn Liu Lianlong He Quangui Guo Hengqiang Ye | 2011 | Carbon2011，，9： | 1 |
| 11 | Microstructure, precipitates and compressive properties of various holmium doped NiAl/Cr(Mo,Hf) eutectic alloys显示文摘 | Liyuan Sheng Lijun Wang Tingfei Xi Yufeng Zheng Hengqiang Ye | 2011 | Materials and Design2011，，： | 1 |
| 12 | Effect of Heat Treatment on the Microstructure of Multiphase NiAl-based Alloy显示文摘合金 Ni-AI26.6-Crl3.4-Co8.1-Ti4.3-W1.3-Mo0.9 (at.pct ) 从超级合金 K44 和艾尔元素使用真空正式就职和扔的技术被制作。到这合金的调查表明拥有低融化的点和差的韧性的新阶段 Cr3Ni2 被形成,它作为沿着 NiAI 矩阵谷物边界的一个网络分布式。随后的不同答案和老化处理被执行并且导致微结构变化到各种各样的程度。当在球的 alpha-Cr 固体答案和像针的 Ni3AI 阶段的形成的在一样的处理结果以后的慢冷却时,为 20 h 的在 1250 ° C 的在答案以后的快速的冷却在标本产生宏裂缝,它在 NiAI 矩阵被嵌入。老化处理开始塑造板条的 Ni3AI 阶段和塑造珍珠的 alpha-Cr 阶段从 NiAI 矩阵猛抛,这是 comfirmed,它与这些拥有取向关系猛抛。 | Yi XIE Lanzhang ZHOU Jianting GUO Hengqiang YE | 2008 | Journal of Materials Science & Technology2008，24，2： | 1 |
| 13 | Atomic structure and enhanced thermostability of a new structure MgYZn4 formed by ordered substitution of Y for Mg in MgZn2 in a Mg-Zn-Y alloy显示文摘A new phase MgYZn4 in Mg-Zn-Y alloy was studied using aberration-corrected scanning-transmission electron microscopy and first-principles calculations. Nanometer-sized MgYZn4 precipitates were formed through ordered substitutions of Y with 50% Mg atoms in MgZn2. MgYZn4 has an orthorhombic structure with a space group of Pmnn, and lattice parameters a =5.2965∧, b =9.4886∧, and c =8.5966 ∧. Importantly, both size and structure of MgYZn4 are stable at 625 K for 5 h, showing higher thermostability than MgZn2, which should be important for applications at elevated temperatures. The enhanced thermostability of MgYZn4 is attributed to the lower formation energy and bonding enhancement due to Y substitution. | Lifeng Zhang Shangyi Ma Weizhen Wang Zhiqing Yang Hengqiang Ye | 2019 | Journal of Materials Science & Technology2019，35，9： | 1 |
| 14 | Atomic origin of magnetic coupling of antiphase boundaries in magnetite thin films显示文摘Revealing the magnetic coupling nature of boundary defects is crucial for in-depth understanding of the behavior and properties of magnetic materials and devices.Here,magnetite(i.e.,Fe_(3)O_(4))thin films were grown epitaxially on(100)SrTiOsingle-crystal substrates by pulsed laser deposition.Atomic-scale scanning transmission electron microscopy characterizations reveal that three types of antiphase boundaries(APBs)are formed in the Fe_(3)O_(4)thin film.They are the(100)APB that is formed on the(100)plane with a crystal translation of(1/4)a[011^(-)],the typeⅠand typeⅡ(110)APBs that are both formed on the(110)plane with the same crystal translation of(1/4)a[101]but different terminated atomic planes.The typeⅠ(110)APB is terminated at the atomic plane with mixed tetrahedral-and octahedral-sites Fe atoms,the typeⅡ(110)APB is terminated at the octahedral-site Fe plane.First-principles calculations reveal that the(100)APB and the typeⅠ(110)APB tend to form the ferromagnetic coupling that will not decrease the spin polarization of Fe_(3)O_(4)films,while the typeⅡ(110)APB prefers to form the antiferromagnetic coupling that will degrade the magnetic properties.The magnetic coupling modes of the APBs are closely related to the Fe-O-Fe bond angles across the boundaries. | Chunyang Gao Yixiao Jiang Tingting Yao Ang Tao Xuexi Yan Xiang Li Chunlin Chen Xiu-Liang Ma Hengqiang Ye | 2022 | Journal of Materials Science & Technology2022，，12： | 1 |
| 15 | Direct Atomic Images of Dislocation Motion Caused by Image Force near Surfaces of Pd Crystal显示文摘The motion of a Lomer dislocation near clean(110)surface of the Pd metal was observed in situ at the atomic level by surface profile imaging technique.The observed distances between the location of the Lomer dislocation and the surface was just covered by the calculated critical range I,within which the image force alone may become the cause of dislocation. | YE Hengqiang NING Xiaoguang D.J.Smith | 1992 | Chinese Physics Letters1992，9，6： | 0 |
| 16 | Evolution of Quasicrystals and Long-Period Stacking Ordered Structures During Severe Plastic Deformation and Mixing of Dissimilar Mg Alloys Upon Friction Stir Welding显示文摘Microstructural evolution during severe plastic deformation and mixing of Mg95.8Zn3.6Gd0.6 and Mg97Cu1Y2(at%)alloys upon friction stir welding was studied.A laminated onion-ring structure composed of alternative distribution of layers with signifi cantly refi ned microstructures from diff erent alloys was formed in the stirred zone.Coarse quasicrystals were broken up and dispersed with most of them being transformed into cubic W-phase particles,and thick 18R long-period stacking ordered plates were fractured and transformed into fi ne 14H-LPSO lamellae in the stirred zone(SZ)experiencing complex material flow under high strain rate.Fine W-phase particles and 14H-LPSO lamellae formed during dissimilar friction stir welding(FSW)usually have no specifi c orientation relationship with surrounding Mg matrix.Chemical measurements demonstrated occurrence of interdiff usion between dissimilar layers in the SZ.Phase transformation was observed for some particles of quasicrystals and long-period stacking ordered(LPSO)in regions slightly outside the SZ.An ultimate tensile strength of~415 MPa and an elongation to failure of~27.8%,both exceeding those of base materials,were obtained in the SZ,due to microstructural refi nement and formation of a laminated structure. | Meichen Liang Hao Zhang Lifeng Zhang Peng Xue Dingrui Ni Weizhen Wang Zongyi Ma Hengqiang Ye Zhiqing Yang | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，1： | 0 |
| 17 | Microstructure of the Ductile Phase in Intermetallic Compound Ni_(50)Al_(20)Fe_(30)显示文摘The microstructure of the single hot extruded and annealed Ni50Al20Fe30Y0.003 intermetallic compound alloys has been examined by means of high resolution electron microscopy (HREM). In these extruded and annealed alloys. the ductile phase is of a mixture of the disordered fcc γ matrix and or dered γ’ precipitates. This fact well interprets the reason why the degree of annealing treatment can influence the strength and ductility of these alloys. The HREM observation revealed directly that there was some strain concentration at γ’-γ interfaces, due to the presence of more iron atoms in these two phases. The fixed orientation relationship between the γ phase and γ’ precipitates was identified to be {001}γ||{00 }γ’ and <100 >γ|| < 100 > γ’ | Lianlong HE Shuhe WANG Jianting GUO and Hengqiang YE (Lab. of Atomic Imaging of Solids, Institute of Metal Research, Academia Sinica, Shenyang, 110015, China)(To whom correspondence should be addressed) | 1994 | Journal of Materials Science & Technology1994，10，5： | 0 |
| 18 | Microstructural Characteristics of La_(0.7)Ca_(0.3)MnO_3 Films and Multilayers显示文摘La0.7Ca0.3MnO3 (LCMO) films and La0.7Ca0.3MnO3/Gd0.7Ca0.3MnO3 (LCMO/GCMO) multilayers have been prepared by pulsed laser deposition. The microstructures of both systems were investigated by transmission electron microscopy (TEM). The main structure of the films and the multilayers was monoclinic with a unit cell of size 2ap x-2ap. x -2ap, where ap is the lattice constant of single perovskite crystal. The LCMO films were composed of three-dimension multitwinning domains, while the LCMO/GCMO multilayers showed two-domain structure. In LCMO/GCMO multilayers, LCMO layers were coherent with GCMO layers and the interfaces between LCMO and GCMO layers were free from mismatch dislocation, which resulted in highly strained multilayerd structures. | Mingguang WANG, DouXing LI, Lianlong HE and Hengqiang YE (Laboratory of Atomic Imaging of Solid, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China) Guangcheng XIONG (Department of Physics and Mesoscopic Physics National Labo | 2000 | Journal of Materials Science & Technology2000，16，6： | 0 |
| 19 | A Molecular Dynamics Study on the (1120) Domain Boundary Structures in Epitaxial Wurtzite GaN显示文摘A computer program has been developed for the moIlcular dynamics calculation of ionic orstrong-ionic covalent systems. Ewald summation algorithm and Keating potentiaI model areadopted to calculate the long-range Coulomb interaction and the short-range bonding forces,respectively. A theoretical study on the domain boundary structures in epitaxial wurtzite GaN film is accomplished with the program. The calculation result is used in the structure formationexplanation of an interesting defect observed by HREM experiment. | Shaoqing WANGt Yuanming WANG and Hengqiang YE(Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110015, China)To whom correspondence should be addressedE-mail: sqwang@imr.ac.cn | 1999 | Journal of Materials Science & Technology1999，15，4： | 0 |
| 20 | FINE STRUCTURES OF BOTH INTERFACES AND INTERFACIAL REACTION PRODUCTS显示文摘The characteristic of interface depending on the atomic structure exerts an inportant,andsometime controlling,influence on performance of the interacial materials.The present paper reviews the main studies on fine structure of both the materials inter-faces and interfacial reaction products in semiconductor uperlattice,metal multilayer ceram-ics and composite materials by mean of selected area electron doffraction patterns and highresolution electron microscopy.The following features of interfaces are reviewed:the orientation relationships;the char-acteristic of steps,facets and ronghness of interfaces;atomic bonding across the interface;thedegree of coherency,the structure of misfit dislocations and elastic relaxations at the inter-faces:the presence of defects at the onterfaces:the structure of the interfacial reaction prod-ucts as well as the reaction kinetics and reaetion mechanism. | LI Douxing PING Dehai NING Xiaoguang YE Hengqiang Laboratory of Atomic Imaging of Solids,Institute of Metal Research,Academia Sinica,Shenyang.China Professor,Institute of Metal Research,Academia Sinica,Shenyang 110015,China | 1993 | Acta Metallurgica Sinica(English Letters)1993，6，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员