材料期刊网

MICROSTRUCTURE AND INDENTATION BEHAVIOUR OF MULTILAYER Ti-N FILM

WAGENDRISTEL A Viena Technical Univessity , AustriaHUANG Rongfang Institute of Metal Research , Academia Sinica , Shenyang , ChinaBANGERT H YANG Xia WU Lihang WANG Haifeng PANGRATZ H SKALICKY P Viena Technical University , Austria Associate Professor , Institute of Metall Research , Academia Sinica , Shenyang 110015 , China

金属学报(英文版)

The microstructure of Ti/TiN multilayer film was studied.It was shown by trans- mission electron microscopy of cross-sectional sample and respective secondary neutrals mass-spectroscopy depth profiling that the film has a periodic alternate multilayered structure:substrate /FeTi/Ti/Ti_2N/TiN/Ti_2N/Ti/Ti_2N/TiN...Ti/Ti_2N/TiN,where FeTi and Ti_2N were the transition layers formed during ion plating.Cross-sectional fracture surface of indentation samples had been obtained and studied with scanning electron microscopy.It was shown that the multilayer film deformed during indentation, formed an indentation pit and a pile-up of materials around the indentation pit.As the applied load increased deformation region extended beyond the film/substratc interface and into the substrate,the interlayer crack in the film and hole formation at the film /substrate interface were initiated.It is also shown that the multilayered Ti/TiN film offered better toughness in comparison with single layer TiN film.

关键词: multilayer Ti-N film , null , null

Optimization on technical parameters for fabrication of SDC film by screen-printing used as electrolyte in IT-SOFC

Journal of Physics and Chemistry of Solids

Sm-doped Ceria (SDC) electrolyte film was successfully fabricated on anode substrate of NiO-SDC by screen-printing. Some technical parameters for fabrication were investigated and optimized, including printing times, ink composition and sintering temperature. Scanning electron microscope (SEM) measurement was done to check the microstructures of SDC film and single cell. The parameters greatly affected the quality of SDC film and cell performance. The single cell with the optimum parameters exhibited an OCV of 0.82 V and a power density of 0.5 W/cm(2) at 600 degrees C. (C) 2008 Elsevier Ltd. All rights reserved.

关键词: thin films;electrochemical properties;microstructure;oxide fuel-cells;ysz electrolyte;thin-film;electrochemical;performance;electrophoretic deposition;reduced-temperature;cathode;anode

Effect of Doping on Microstructure and Technical Usage Property of Tantalum Wire

武汉理工大学学报-材料科学版(英文版) doi:10.1007/s11595-014-0885-8

关键词:

Effect of Initialization Technical Parameters on Optical Absorption of Ge2Sb2Te5 Thin Films

材料科学技术（英）

关键词:

Technical note: Research and development of localized corrosion rate monitoring instrument for nonpassivable metal in corrosive media

Corrosion

This paper introduces the design of a localized corrosion rate monitoring instrument that can monitor and evaluate the maximum and stable localized corrosion rate of a nonpassivable metal in a corrosive environment by measuring the current density in a corrosion sensor with an occluded anode.

关键词: instrument;localized corrosion rate;monitor

Effect of Initialization Technical Parameters on Optical Absorption of Ge2Sb2Te5 Thin Films

Ming FANG , Qinghui LI , Fuxi GAN

材料科学技术（英）

The optical absorption properties of phase-change optical recording thin films subjected to various initialization conditions were investigated. The effects of initialization power and velocity on optical constants of the Ge2Sb2Te5 thin films were also studied. The energy gap of Ge2Sb2Te5 thin films subjected to various initialization conditions was also obtained. It was found that the optical energy gap of the Ge2Sb2Te5 thin films increased with either increasing initialization laser power or decreasing initialization velocity, with peak of 0.908 eV at laser power of 1000 mW or initialization velocity of 4.0 m/s, but the continued increasing initialization laser power or decreasing initialization velocity resulted in the decrease of the optical energy gap. The change of the optical energy gap was discussed on the basis of amorphous crystalline transformation.

关键词: Phase transformation , null , null , null , null

CONTROL TECHNIQUES FOR DIGESTION IN BAYER PROCESS

G. Y. Gan and L.Z. Wang (Pingguo Aluminum Company , Pingguo 531400 , China)

金属学报(英文版)

The control techniques for indirect heating digestion in Bayer process of alumina production were researched and developed. They include controlling chemical composition of slurry to be digested and controlling digestion status and energy consumption. Very good performances and technical and technical and economical figures for digestion process have been obtained by carefully applying these comprehensive control techniques in Pingguo alumina refinery.

关键词: control technique , null , null

INTRODUCTION TO NEW TECHNOLOGY AND EQUIPMENTS IN PINGGUO ALUMINA REFINERY

S.J. Yang , G. Y. Gan and L.Z. Wang (Pingguo Aluminum Company , Guangxi 531400 , China)

金属学报(英文版)

The new technology and equipments used in alumina refinery in PINGGUO ALUMINUM COMPANY were introduced. Problems encountered during early period of its operation and improvements to the process and equipments were discussed. Current opemtion situation and pedect technical and economical figures were also introduced.

关键词: alumina , null , null , null

Dome Combustion Hot Blast Stove for Huge Blast Furnace

ZHANG Fu-ming , MAO Qing-wu , MEI Cong-hua , LI Xin , HU Zu-rui

钢铁研究学报(英文版)

In Shougang Jingtang 5500 m3 huge blast furnace (BF) design, dome combustion hot blast stove (DCHBS) technology is developed. DCHBS process is optimized and integrated, and reasonable hot blast stove (HBS) technical parameters are determined. Mathematic model is established and adopted by computational fluid dynamics (CFD). The transmission theory is studied for hot blast stove combustion and gas flow, and distribution results of HBS velocity field, CO density field and temperature field are achieved. Physical test model and hot trail unit are established, and the numeral calculation result is verified through test and investigation. 3-D simulation design is adopted. HBS process flow and process layout are optimized and designed. Combustion air two-stage high temperature preheating technology is designed and developed. Two sets of small size DCHBSs are adopted to preheat the combustion air to 520-600 ℃. With the precondition of BF gas combustion, the hot blast stove dome temperature can exceed 1420 ℃. According to DCHBS technical features, reasonable refractory structure is designed. Effective technical measures are adopted to prevent hot blast stove shell intercrystalline stress corrosion. Hot blast stove hot pipe and lining system are optimized and designed. After blowing in, the blast temperature keeps increasing, and the monthly average blast temperature reaches 1300 ℃ when burning single BF gas.

关键词: dome combustion hot blast stove , high blast temperature , ceramic burner , high temperature combustion air preheating , CFD

THE PRODUCTION OF FOAM ALUMINIUM ALLOY BY LOW-PRESSURE INFILTRATION METHOD

Y. Zhang , Z.D. Zhao and J.C. Ding Department of Mechanical Engineering , Shandong Institute of Technology , Zibo 255012 , China

金属学报(英文版)

The influence of technical parameters on the infiltrating height of the moltenmetal in the process of Producing aluminium alloy foam by low-pressure infiltration method were investigated.Experiments indicated that the height increases with the preheating temperature of granules,theexternal pressureand the pouring temperature of molten alloy,among which the action of pre heating temperature of granules is more effective.There exists a critical pre heating temperature for different size of granules.

关键词: aluminium alloy foam , null , null