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| 1 | TEM and HRTEM Study of Microstructures in Omphacite from UHP Eclogites at Shima,Dabie Mountains,China显示文摘Transmission electron microscope (TEM) and high resolution transmission electron microscope (HRTEM) analyses have been performed on omphacite from ultra-high pressure (UHP) eclogites at the locality of Shima, Dabie Mountains, China. TEM reveals that the microstructures consist dominantly of dislocation substructures, including free dislocations, loops, tiltwalls, dislocation tangles and subboundaries. They were produced by high-temperature ductile deformation, of which the main mechanism was dislocation creep. Antiphase domain (APD) boundaries are common planar defects; an age of 470±6 Ma for UHP eclogite formation has been obtained from the equiaxial size of APDs in ordered omphacites from Shima, coincident with ages given by single-zircon U-Pb dating (471±2 Ma). HRTEM reveals C2/c and P2ln space groups in different parts of one single omphacite crystal, and no exsolution is observed in the studied samples, which is attributed to rapid cooling. It is suggested that the UHP eclogites underwent a | WU Xiuling HAN Yujing MENG Dawei YANG Weiran LI Douxing | 2000 | Acta Geologica Sinica(English Edition)2000，74，2： | 2 |
| 2 | Bending-induced extension in two-dimensional crystals显示文摘We find by ab initio simulations that significant overall tensile strain can be induced by pure bending in a wide range of two-dimensional crystals perpendicular to the bending moment, just like an accordion being bent to open.This bending-induced tensile strain increases in a power law with bent curvature and can be over 20% in monolayered black phosphorus and transition metal dichalcogenides at a moderate curvature of 2 nm-1but more than an order weaker in graphene and hexagon boron nitride. This accordion effect is found to be a quantum mechanical effect raised by the asymmetric response of chemical bonds and electron density to the bending curvature. | Douxing Pan Yao Li Tzu-Chiang Wang Wanlin Guo | 2017 | Acta Mechanica Sinica2017，33，1： | 1 |
| 3 | Microstructural Features of Garnets in Jadeite Quartzite from Dabie Mountains, China显示文摘Garnet is an important rock forming mineral of high pressure and ultrahigh pressure metamorphic rocks. Its popular isomorphism complicates its chemical composition and crystal structure. The selected area electron diffraction (SAED) and the high resolution electron microscopy (HREM) are used in this work to study the microstructures and ultrastructures of garnets in the jadeite quartzite from Dabie Mountains, China. The microstructures of the garnet occur mainly as free dislocations, dislocation walls, stacking faults, dislocation networks and sub grain boundaries. The dislocation density is ρ=n ×10 8/cm 2 ( n =1.7—7.5) and the deformation mechanism is the dislocation glide and dynamic recovery. The superstructures of the garnet crystal revealed by HREM occur mainly as dislocations, faults, domain structures and lattice deformations, indicating the strong stress during the formation of the jadeite quartzite. | Wu Xiuling Mou Tao Han Yujing Test Center, China University of Geosciences, Wuhan 430074, China Li Douxing Laboratory of Atomic Imaging of Solid, Institute of Metal Research, Academia Sinica, Shenyang 110015, China | 2000 | Journal of Earth Science2000，19，3： | 1 |
| 4 | SiC FIBRE-REINFORCED Ti-BASED COMPOSITE显示文摘SiCFIBRE-REINFORCEDTi-BASEDCOMPOSITE￥LuYuxiong;LiDouxing;ShiNanlin;MaZhongyi;BiJing(InstituteofMetalResearch,ChineseAcademyof... | Lu Yuxiong Li Douxing Shi Nanlin Ma Zhongyi Bi Jing(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110015) | 1996 | 中国有色金属学会会刊:英文版1996，6，4： | 0 |
| 5 | 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 |
| 6 | 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 |
| 7 | CRYSTAL DEFECTS AND GRAIN INTERFACE STRUCTURE OF ION-NITRIDED LAYERS显示文摘Observation under high resolution electron microscope shows that the continuous bombing ofhigh speed ions produces a great amount of vacant site defects.The assembly of vacanciesforms vacant dish,and the collapase of vacant dish forms stacking fault tetrahedrons and oth-er crystal defects.The interfaces between phase ε(Fe2-3N)and phase γ’(Fe4N)are smooth,straight and coherent,and they have the orientation relationships of(11)//(0001)and[110]/[110] . | SUN Dongsheng LI Fengzhao Shandong Polytechnic University,Jinan Laboratory of Atomic Imaging of Solids,Institute of Metal Research,Academia Sinica,Shenyang,ChinaDAI Jiyan LI Douxing Laboratory of Atomic Imaging of Solids,Institute of Metal Research,Academia Sinica,Shenyang,China associate professor,Institute of Materials Engineering,Shandong Polytechnic University,Jinan 250014,China | 1993 | Acta Metallurgica Sinica(English Letters)1993，6，6： | 0 |
| 8 | Study on the Diffraction Patterns of α'-Fe_(16)N_2 with Jack-1 and Jack-2 Structural Parameters显示文摘Two body centered tetragonal (bet) crystal structures of α'-Fe16N2 with x=0.25, z=0.3125 (Jack-1) and x=0.222, z=0.306 (Jack-2) respectively, were analyzed theoretically with EMS software package. The simulation of diffraction patterns indicates that both diffraction patterns of the same axis in these two structures obey bcc extinction rule. The conclusion is also obtained from the analyses of the diffracted waves. α'-Fe16N2 precipitates in the diffusion layer of ion-nitrided α-iron have been studied with transmission electron microscope (TEM). We have distinctly observed the electron diffraction patterns of α'-Fe16N2 in [100], [111], [110], [011], [210], [021], [311], [113], [331] and [133] zone axes with perfect symmetry, which indicate the parallel orientation relationship with α matrix:<001>α'//<001>α'// {100}.α'// {100}tα. The analyses of diffraction patterns, which obey bcc extinction rule, verify the bct structure of α'-Fe16N2 discovered by X-ray diffraction. | Zhiquan LIU and Douxing LI (Laboratory of Atomic Imaging of Solids, Institute of Metal Research, CAS, Shenyang 110015, China) Xiaolei XU, Liang WANG and Zukun HEI (Institute of Materials and Technology, Dalian Maritime University, Dalian 116026, China) | 2000 | Journal of Materials Science & Technology2000，16，4： | 0 |
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