材料期刊网

EVALUATION OF EMBRITTLEMENT BEHAVIOR DUE TO SENSITIZATION IN A CRYOGENIC AUSTENITIC STAINLESS STEEL BY MEANS OF SMALL PUNCH AND FRACTURE TOUGHNESS TESTS

S.C Liu(Research Institute for Fracture Technology Faculty of Engineering , Tohoku University , Sendai , Japan , on leave from Dalian Railway Institute , Dalian 116028 , China)II-Hyun Kown , T Hashida and H Takahashi(Research Institute for nacture Technology , Faculty of Engineering , Tohoku Univeristy , Sendai , Japan)

金属学报(英文版)

In order to evaluate the tendency of mechanical properties degrudation due to weld-ing and other processing in materials used for supporting coils in super conducting rnaguets utilized in thermonuclear jusion reactore, a small punch (SP) test was used.This test, which was originally developed to stu...

关键词: small punch test , null , null , null

Reheating Austenitizing Temperature of Spring Steel 60Si2MnA for Railway

CUI Juan , LIU Yazheng , PAN Hui , GAO Lifeng

钢铁研究学报(英文版)

The microsturctural transformation of austenite grain, pearlite interlamellar spacing, and lamellar cementite thickness of spring steel 60Si2MnA for railway were studied in the hotrolled and reheated states. Furthermore, the effect of microstructural characterization ...

关键词: austenitizing temperature;austenite grain;pearlite interlamellar spacing;hardness;toughness

Kunming Institute of Precious Metals

WANG Yonglu NING Yuantao Kunming Institute of Precious Metals , Kunming , China.

材料科学技术（英文）

关键词:

MICROSTRUCTURE AND PROPERTIES OF SiC_w/6061Al COMPOSITE The Author is now with Institute of Metal Research,Academia Sinica,China

MA Zongyi YAO Zhongkai Harbin Institute of Technology , Harbin , China

金属学报(英文版)

The SiC_w/Al composite prepared by squeeze casting has a combination of superior room temperature specific strength and modulus together with excellent thermal properties.The extrusion can make an improvement on the strength and ductility of the composite from 582 MPa ...

关键词: composite , null , null , null

Origin of deformation twinning from grain boundary in copper

Applied Physics Letters

The occurrence of deformation twinning in face-centered-cubic (fcc) crystals with medium to high stacking fault energy is normally very difficult. Through specially designing the orientation of Cu single crystal, the authors do not only observe profuse nanoscale deformation twins with a tower shape ...

关键词: low strain-rate;nanocrystalline al;room-temperature;single-crystals;mechanism;metals;evolution;aluminum

MICROSTRUCTURE OF GERMANIUM QUENCHED FROM THE UNDERCOOLED MELT AT HIGH-PRESSURES

Applied Physics Letters

The solidification behavior of germanium quenched from the melt at pressure of 2-7 GPa is presented. The solidification parameters of specimen were directly measured under high pressure. The microstructure of specimen was observed by electron microscopy.

关键词:

Electroluminescence from Si/Si oxynitride superlattices

Applied Physics Letters

The Si/Si oxynitride superlattices, with three periods, have been grown using the two-target alternation magnetron sputtering technique. The thicknesses of Si oxynitride layers and Si layers in the superlattices are 2.0 and 1.4 nm, respectively. Visible electroluminescence (EL)

关键词: chemical-vapor-deposition;silicon-nitride films;optical-properties;spectra

Comparative study of ultraviolet emission with peak wavelengths around 350 nm from oxidized porous silicon and that from SiO2 powder

Applied Physics Letters

Ultraviolet (UV) light emission with almost the same peak wavelengths from thermally oxidized porous silicon (OPS) (340, 355, and 370 nm) and SiO2 powder (340, 350, and 370 nm) has been observed. Photoluminescence excitation spectra of OPS without Si nanoscale particle...

关键词: light-emission;visible luminescence;optical-properties;photoluminescence;excitation;mechanism;centers;films

Photoluminescence from nanometer Ge particle embedded Si oxide films

Journal of Applied Physics

Nanometer Ge particle (NGP) embedded Si oxide films were deposited on p-type Si substrates using the rf magnetron sputtering technique with a Ge-SiO2 composite target. The area ratio percentage of the Ge target to the composite target was 5%. These films were annealed in a N-2 ambient at 300, 600, 8...

关键词: visible photoluminescence;porous silicon;luminescence;confinement;mechanism;matrix;raman

Electroluminescence from Au/Si nitride film Si with the film prepared by electron cyclotron resonance method

Applied Physics Letters

We use only nitrogen as the reaction gas to deposit on the cleaned Si wafer an extra-thin Si nitride film (similar to 40 Angstrom) by electron cyclotron resonance method. Electroluminescence (EL) with its peak wavelength at about 7000 Angstrom from the semitransparent ...

关键词: