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PHASE EXTENSION AND STRUCTURE ANALYSIS bY THE MAXIMUM ENTROPY METHOD

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Acta Metallurgica Sinica(English Letters) 1998年第4期11卷 241-254页

作者： G.b.Hu and q.b.yang (Department of Physics, Xiangtan University, Xiangtan 411105, China)(beijing Laboratory of Electron Microscopy, Center for Condensed Matter Physics, The Chinese Academy of Sciences, P. O. box 2724, beijing 100080, China) Xiangtan Univ Xiangtan China

Excellent results are obtained in structure analysis with jew phases of structure factors by the maximum-entropy method (MEM) for CaGaN PbCO3 and Rebe22 single crystals. The computation time and memory space are minim... 详细信息

关键词： maximum entropy method structure analysis phase extension,symmetry

quantum Transport through Magnetic bariers

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电子显微学报 1997年第4期 61-64页

作者： J.q.You 1,2 L.D.Zhang 1 q.b.yang 2 ( 1Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031) ( 2Department of Physics, Xiangtan University, Xiangtan, Hunan 411105)

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quantum Transport through Magnetic barriers

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Quantum Transport through Magnetic Barriers

Interface Modulations on The Nanostructured Chains

1996年中国青年学者物理学讨论会

作者： J.q.You~(1,2) L.D.Zhang~1 q.b.yang~2 ~1 Institute of Solid State Physics,Chinese Academy of Sciences,Hefei,Anhui 230031 ~2 Department of Physics,Xiangtan University,Xiangtan,Hunan 411105

＜正＞We study the electron transport through magnetic *** is found that the conductance exhibits resonant structures and shows a strong dependence on the shape of the magnetic barrier.

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来源： cnki会议评论

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电子显微学报 1997年第4期 49-50页

作者： X.H.Yan 1,2 \ L.D.Zhang 1\ Z.P.Duan 1,3 \ q.b.yang 2 ( 1Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 2Department of Physics, Xiangtan University, Xiangtan, Hunan 4111054 3Institute of Me

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关键词： The Nanostructured Modulations Chains Interface

Interface Modulations on The Nanostructured Chains

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Interface Modulations on The Nanostructured Chains

Crack Initiation Mechanism of Z3CN20.09M Duplex Stainless Steel during Corrosion Fatigue in Water and Air at 290 °C

1996年中国青年学者物理学讨论会

作者： X.H.Yan~(1,2) L.D.Zhang~1 Z.P.Duan~(1,3) q.b.yang~2 ~1 Institute of Solid State Physics,Chinese Academy of Sciences,Hefei,Anhui 230031 ~2 Department of Physics,Xiangtan University,Xiangtan,Hunan 4111054 ~3 Institute of Mechancs,Chinese Academy of Science,beijing 100080

＜正＞We study the spectral properties of the nanostructured chains in which the numbers of the nanoscaled sections distribute according to certain *** calculating numerically the density of states in terms of the renormalization-group Green’s function scheme,it is found that the singular spectral properties of nanostructured systems are mainly because of the lattice distortions at the boundary atoms of nanoscaled grains.

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Journal of Materials Science & Technology 2015年第11期31卷 1144-1150页

作者： H.C.Wu b.yang Y.Z.Shi q.Gao Y.q.Wang State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Collaborative Innovation Center of Universal Iron & Steel Technology School of Materials Science and Engineering Anhui University of Technology

The crack initiation mechanism of a Z3CN20.09M duplex stainless steel （DSS） during corrosion fatigue （CF） in water and air at 290 ℃ was investigated by using a CF cracking machine and a scanning electron microscopy （SEM）. The cracks were initiated successively at the persistent stip bands （PSbs）, phase boundaries （Pbs） and pitting corrosion points （PCPs） of the specimens when they were tested in water at 290 ℃, while in airat 290 ℃ the cracks were only initiated at the PSbs and Pbs. And the cracks were found mainly to initiate at the PSbs and Pbs when the specimens were tested in water and air at 290 ℃, respectively. The results also reveal that the cracks were likely to be initiated at the first 20% of fatigue life of the specimens tested in water at 290 ℃. However, the cracks were not found until 50% of fatigue life when tested in air at 290 ℃. Moreover, the crack numbers of the specimens tested in water at 290 ℃ were much more than those tested in air at 290 ℃.

关键词： Duplex stainless steel Corrosion fatigue Crack initiation High temperature water

Finite Element Analysis of Push-Out Test of SiC Fiber Reinforced Titanium Matrix Composites

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稀有金属材料与工程 2009年第A3期38卷 50-53页

作者： Yuan M N yang Y q Huang b Zhang R J School of Materials Northwestern Polytechnical University Xi＇an 710072 China

based on the interphase layer model and the spring layer model, an improved interface model was developed to evaluate the interfacial shear strength of Titanium matrix composites(TMCs) and to analyze the effects of various parameters on the interfacial properties. The results showed that the improved interface model is more suitable for calculating the interfacial properties of SiC fiber reinforced titanium matrix composites. The interfacial shear strength of SiC/Timetal-834 predicted is 500 MPa. In addition, in order to better understand the interfacial properties of composites, some push out phenomenon were analyzed.

关键词：复合材料剪切强度碳化硅纤维物理性能

INVESTIGATION ON THE FORMATION MECHANISM OF TITANIUM CARbIDE PREPARED bY IN SITU REACTION IN MOLTEN ALUMINUM

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Acta Metallurgica Sinica(English Letters) 1997年第6期10卷 485-488页

作者： yang, b. Wang, Y.q Zhang, J. Zhou, b.L. Inst of Metal Research Chinese Acad of Sciences Shenyang China

A novel technique in which TiC particulate are prepared by an in situ reaction in molten aluminum was introduced for producing TiC/Al composite. In order to reveal the characteristics of the technique, the formation mechanism of TiC particulate prepared by this method was studied. both theoretical and experimental results show that the TiC particulate is formed by a diffusion mechanism when the molar fraction of aluminum in the preforms is higher than 20.02%. On the contrary, the TiC particulate is formed by a solution-precipitation mechanism when the fraction of aluminum in the preforms is lower than 20.02%.

关键词： Aluminum metallurgy In situ processing Metallic matrix composites Titanium carbide

AN HREM STUDY OF A LATERAL MICROCRACK bENEATHINDENTATION OF [001] SILICON

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Acta Metallurgica Sinica(English Letters) 1998年第5期11卷 342-346页

作者： Y.q.Wu X.Y.yang Y.b.Xu Inst of Metal Research The Chinese Acad of Sciences Shenyang China

A cross-sectional sample of indentation in [001] silicon was made and a lateral microcrack beneath the indentation was observed by high resolution electron microscope (HREM). The HREM images around the microcrack tip show an alternate distribution of the amorphous and lattice structure. The crack does not propagate by the successive debonding between certain atomic planes, meaning that before a crack completely opens, there may be a stage of amorphization, resulting from severe distortion of lattice.

关键词： amorphization lateal crack indentation HREM silicon