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Solitary Magnon Localization in Antiferromagnet RbFeBr_3

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Journal of materials Science & Technology 1994年第3期10卷 225-228页

作者： Wuming LIU and benlian zhou(international centre for materials physics, institute of metal research, academia sinica, shenyang, 110015, china)Liming GUO(Dept. of Mathematics, institute of Yunnan Nationality, Xunming, 650031, china) Inst of metal research Academia Sinica Shenyang China

Introducing the Dyson-Maleev transformation. the coherent state ansatz and the time-dependent variation principle, we obtain two partial different equations of motion from Hamiltonian. Employing the method of multiple scales. we reduce these equations into the envelope function equations and force the amplitude function to satisfy a nonlinear Schrodinger equation. Using the inverse- scat-tering transformation, we obtain the single soliton solution and discuss the solitary magnon localization in antiferromagnet RbFeBr3

关键词： Rev Solitary Magnon Localization in Antiferromagnet RbFeBr3

Intrinsic Localized Modes in an Order-parameter-preserving Antiferromagnet

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Journal of materials Science & Technology 1993年第2期9卷 148-152页

作者： Wuming LIU+ Shaoyun FU benlian zhou, international centre for materials physics, institute of metal research, academia sinica, shenyang, 110015, china

Intrinsic localized modes in an order-parameter-preserving antiferromagnet are investigated with employing the Dyson-Maleev transformation and the coherent-state ansatz. These modes which be- low the magnon frequency band correspond to a local large-angle, low-frequency precessional mo- tion of spins, quantum states of which are characterized by the indefiniteness of the number of rele- vant magnons.

关键词： intrinsic localized mode antiferromagnet magnon

Theoretical Prediction of Strength of Composite with Fractal-tree Structure Fibers

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Journal of materials Science & Technology 1993年第6期9卷 400-404页

作者： Shaoyun FU Wuming LIU benlian zhou Chiwei LUNG international centre for materials physics,institute of metal research,academia sinica,shenyang,110015,china

Theoretically;the strength of composite with branched fibers is predicted to be greater than that of composite with plain *** effects of the branching angle of the fiber,and the snubbing friction between the fiber and the matrix at the fiber branching point and the branching step's number of the fiber on the strength of the composite with branched fibers have been *** has been shown that the strength of the composite increases with branching angle,the snubbing friction and the branching step's number.

关键词： composite fiber fractal-tree structure

A Biomimetic Model of Fiber-reinforced Composite materials

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Journal of materials Science & Technology 1994年第1期10卷 34-38页

作者： Shihong LI Ronghui ZHANG Shaoyun FU Xin CHEN and benlian zhou(institute of metal research, academia sinica, shenyang, 110015, china)Qiyun ZENG(institute of Applied Ecology, academia sinica, shenyang, 110015, china) Inst of metal research Shengyang China

In thjs paper. bamboo fiber has been. on micro scale. investigated as a helical. multi-layered hollow cylinder, the stiffness featu res of bamboo bast fiber were compared with those of a multifilament yarn in traditional fiber-reinforced composite materials, Moreover. a biomimetic model of the reinforce ment of fiber-reinforced composite materials was proposed by imitating the fine structure of bamboo bast fiber. The results show that the comprehensive stiffness properties of the cornplicated fine struc ture of bamboo fiber is superior over those of traditional fiber-reinforced composites.

关键词： Cl A Biomimetic Model of Fiber-reinforced Composite materials

Some Further Considerations about the Theory of Elastic Stress Transfer from Partially Embedded Axially Loaded Fiber to Matrix

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Journal of materials Science & Technology 1993年第5期9卷 322-326页

作者： Shaoyun FU benlian zhou Chiwei LUNG international Center for materials physics,institute of metal research,academia sinica,shenyang 110015,china

In this paper the elastic stress transfer from the fiber to the matrix is analysed for fiber-reinforced composites when the fiber is loaded *** dependence of the elastic stress transfer on the as- pect ratio of the fiber,the volume fraction of the fiber,the fiber-to-matrix elastic modulus ratio and the Poisson's ratio of the fiber and the matrix has been shown in detail.

关键词： elastic stress transfer fiber composite

Analysis of Interfacial Coating Effect on Thermal Stress in Composites

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Journal of materials Science & Technology 1993年第2期9卷 96-100页

作者： Yuqing WANG+ benlian zhou Zuoming WANG Changxu SHI, institute of metal research, academia sinica, shenyang, 110015, china

A preliminary model for the analysis of thermo-mechanical behaviour of interfacial coatings on the fibers in unidirectional composites have been developed on the solution of thermo-elastic mechan- ics. Thermal stress would be introduced into the composite during cooling because of the mismatch of thermo-mechanical properties among their components. The low modulus coating can effectively reduce the interracial stress caused by different thermal expansion coefficient between fibers and ma- trix, no matter how high or low the expansion coefficients of coatings are in CF/Al and SiC/Ti composite systems, however, high modulus coating can decrease the interfacial compressive stress, only when the thermal expansion coefficient of coating is lower.

关键词： composite thermal stress interfacial coating

Preparation of Nickel materials with Fractal Structure

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Journal of materials Science & Technology 2003年第3期19卷 229-231页

作者： Ruichun WANG, Jingdong GUO benlian zhoushenyang National Laboratory for materials Science, institute of metal research, Chinese Academy of Sciences, shenyang 110016, china Lab. for Mat. Sci. Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

A way of manufacturing nickel material with fractal structure has been studied. Some algae with natural fractal structure were used as the basic substrates. The nickel was coated on the substrates by both electroless deposition and electrodeposition. After elimination of the foundational algae by erosion, dissolution etc, the pure nickel materials with fractal structure were obtained. At last, the specific surface area was analyzed by BET analyses and the fractal dimension of the nickel material was calculated by means of box-counting technique. The comparison of fractal dimension between Ni structure and natural algae was also given.

关键词： Fractal Nickel Algae Box counting

Enhanced Bamboo Reinforced Aluminum Laminates

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Journal of materials Science & Technology 1994年第5期10卷 355-358页

作者： Shihong LI Shaoyun FU and benlian zhou (Int. centre for Mater. Phys., institute of metal research, Chinese Academy of Science, shenyang, 110015, china)Qiyun ZENG and Xianrong BAO (institute of Applied Ecology, Chinese Academy of Sciences, shenyang, 11 Inst of metal research Shenyang China

A new technique has been developed for flattening circular natural bamboo culm to plate form for remarkably enhancing its mechanical properties, The enhanced bamboo, cheaper than Al, is then used to reinforce an aluminum alloy for civilian applications. The properties of the composite are greatly enhanced compared to those of the Al alloy. The Al protects bamboo from bioerosion and improves hygroscopicity

关键词： Laminated composites

3,9-二羟甲基-3′,9′-二苯基-1,5,7,11-四氧杂螺环[5,5]十一烷的合成及聚合反应

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沈阳化工学院学报 1997年第4期11卷 298-303页

作者：王长松周本濂中国科学院金属研究所

利用苯乙醛与甲醛之间的坎尼扎罗反应合成２－苯基－２－羟甲基丙二醇，进而合成新的螺环化合物：３，９－二羟甲基－３′，９′－二苯基－１，５，７，１１－四氧杂螺环［５，５］十一烷．通过红外光谱、核磁共振氢谱和元素分析证实了... 详细信息

利用苯乙醛与甲醛之间的坎尼扎罗反应合成２－苯基－２－羟甲基丙二醇，进而合成新的螺环化合物：３，９－二羟甲基－３′，９′－二苯基－１，５，７，１１－四氧杂螺环［５，５］十一烷．通过红外光谱、核磁共振氢谱和元素分析证实了它的组成和结构．在三氟化硼单乙胺络合物的作用下，该化合物能够进行双开环聚合反应．用膨胀计法跟踪测试了在聚合反应过程中它的体积膨胀率约为３．８％，并对聚合反应机理作了初步探讨．

关键词：螺环原碳酸酯膨胀阳离子开环聚合聚合