检索结果-南通市图书馆

Microstructure and properties of aging Cu–Cr–Zr alloy

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2014年第2期33卷 134-138页

作者： Kun Wang Ke-Fu Liu Jing-Bo Zhang Institute of Electric lighting Source Fudan University No.23 Research Institute China Electronics Technology Group Corporation No. 23 Research Institute China Electronics Technology Group Corporation

The crystallography and morphology of precipitate particles in a Cu matrix were studied using an aged Cu–Cr–Zr alloy by transmission electron microscopy（TEM） and high-resolution transmission electron microscopy（HRTEM）. The tensile strength and electrical conductivity of this alloy after various aging processes were tested. The results show that two kinds of crystallographic structure associated with chromium-rich phases, fcc and bcc structure, exist in the peak-aging of the alloy. The orientation relationship between bcc Cr precipitate and the matrix exhibits Nishiyama–Wasserman orientation relationship. Two kinds of Zr-rich phases（Cu4Zr and Cu5Zr）can be identified and the habit plane is parallel to {111}Cu plane during the aging. The increase in strength is ascribed to the precipitation of Cr- and Zr-rich phase.

关键词： Cu–Cr–Zr alloy Aging process Crystallography Morphology Strengthening mechanism

Degradation of dibromophenols by UV irradiation

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2014年第6期26卷 1284-1288页

作者： Keiko Katayama-Hirayama Naoki Toda Akihiko Tauchi Atsushi Fujioka Tetsuya Akitsu Hidehiro Kaneko Kimiaki Hirayama Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi 4-3-11 Takeda Kofu 400-8511 Japan technology Development Division Toshiba Lighting and Technology Corporation Asahimachi 5-2-1 Imabari Ehime 794-8510 Japan

We examined the degradation of dibromophenols （DBPs）, i.e. 2,4-DBP, 2,6-DBP and 3,5-DBP by ultraviolet （UV） irradiation and estimated the relationship between degradability and molecular orbital properties of each dibromopbenol. The removal of DBPs under a UV lamp system was successfully performed in an aqueous solution. After 5 min of irradiation, the initial DBPs concentration of 20 mg/L was decreased to below 1 mg/L, and about 60% of bromide ion was released. A decrease in the concentration of dissolved organic carbon （DOC） suggested the mineralization of DBPs, The mineralization may occur after release of bromide ions because the decrease of DOC was slower than the release of bromide ions. The degradability of 3,5-DBP was slightly lower than 2,6-DBP and 2,4-DBE Molecular orbital calculation suggested that the electrophilic frontier density and the highest occupied molecular orbital （HOMO） energy may be related to the degradability of DBPs.

关键词： bromide ion dibromophenol DOC mineralization UV irration

DEVELOPMENT OF LUMINAIRES USING SINGLE-CAPPED FLUORESCENT LAMPS

在线全文

学校读者我要写书评

暂无评论

DEVELOPMENT OF LUMINAIRES USING SINGLE-CAPPED FLUORESCENT LA...

Investigation on space charge and charge trap characteristics of gamma-irradiated epoxy micro–nano composites

The First Tripartite lighting SCI-TECH Forum of China,Japan and Republic of Korea

作者： Hisashi Baba Naoki Sugishita Homare Takai toshiba lighting technology corporation

＜正＞We have developed V-shaped luminaire and high bay luminaire using high-frequency single-capped fluorescent lamps （FHP105） of high-power and long life,and have realized large energy saving and resource conserva... 详细信息

关键词： Fluorescent Luminaire Single-capped Fluorescent Lamps Energy Saving CO2 Reduction

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

High Voltage 2020年第2期5卷 191-201页

作者： Myneni Sukesh Babu Ramanujam Sarathi Nilesh Jayantilal Vasa Takahiro Imai Department of Electrical Engineering Indian Institute of Technology MadrasChennai 600036India Department of Engineering Design Indian Institute of Technology MadrasChennai 600036India toshiba corporation Powerand Industrial Systems R&D Centre1Toshiba-choFuchu-shiTokyo 183–8511Japan

Epoxy nano–micro composite specimen prepared with micro silica and ion trapping nanoparticle,by shear mixing process,was exposed to gamma radiation and its performance for space charge and charge trap characteristics were *** threshold for space charge accumulation of epoxy nanocomposites reduces and rate of space charge accumulation increases with an increase in dosage of gamma *** average growth of space charge density during poling and charge decay rate during depoling are relatively higher for gamma-irradiated specimens than the virgin *** initial surface potential has a marginal reduction with increase in the dosage of gamma radiation,but the surface potential decay rate has increased *** distribution characteristics indicate more number of shallow traps and increase in charge mobility after *** relative permittivity and loss tangent of the specimens have high impact due to gamma *** activation energy calculated from DC conductivity by Arrhenius law reduces with increment in radiation ***-induced breakdown spectroscopy reflected no change in elemental composition with gamma-irradiated *** variation in plasma temperature and ion line to atomic line intensity ratio with dosage of gamma radiation have direct correlation to the Vickers hardness number of the specimens.

关键词： composites charge composite

Difference in Structural Relaxation Times of Inner Surface and Inner Bulk Region of Silica Glass Arc Tube

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

New Journal of Glass and Ceramics 2013年第1期3卷 48-52页

作者： Takuya Honma Nobuhiro Tamura Kazuya Saito Edson Sekiya Protection & Material Engineering Department Toshiba Lighting & Technology Corporation Yokosuka Japan Research Center for Advanced Photon technology Toyota Technology Institute Nagoya Japan

The fictive temperature and structural relaxation of a silica glass arc tube were investigated to elucidate the origin of cracking in the arc tubes used in high-intensity discharge lamps for vacuum ultraviolet light sources. The structural relaxation time near the inner surface was decreased much more than that in the inner bulk region, resulting in a large difference in the fictive temperature between these two areas at high-intensity discharge lamp operating temperatures. This difference should induce strain in the silica glass network. On the basis of our results, we suggest ways to avoid cracking and extend the lifetime of high-intensity discharge lamps.

关键词： Structural Relaxation Time Fictive Temperature High-Intensity Discharge Lamps

Development and Application of Laser Peening in Japan

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

航空制造技术 2006年第1期49卷 73-77页

作者： Yuji Sano toshiba corporation Yokohama/Japan

This paper reviews the current status of research and development on laser peening without protective coating(LPPC) in Japan. LPPC is an innovative process since it does not require any surface coating that is formed prior to laser irradiation in conventional laser peening for preventing the surface from melting. Surface residual stress of various metal materials was converted from tensile to compressive by LPPC. High cycle fatigue property was remarkably improved for steels, aluminum alloys and titanium alloys. Accelerating stress corrosion cracking (SCC) tests showed that LPPC completely prevents SCC of sensitized austenitic stainless steels, nickel-based alloys and their weld metals. LPPC has been utilized to combat against SCC in Japanese nuclear power reactors since 1999.

关键词：激光敲击应力疲劳腐蚀裂化金属处理结构力学

High performance lateral Schottky diodes based on quasi-degenerated Ga_2O_3

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第3期28卷 54-59页

作者： Yang Xu Xuanhu Chen Liang Cheng Fang-Fang Ren Jianjun Zhou Song Bai Hai Lu Shulin Gu Rong Zhang Youdou Zheng Jiandong Ye School of Electronic Science and Engineering Nanjing UniversityNanjing 210093China Collaborative Innovation Center of Solid-State lighting and Energy-Saving Electronics Nanjing UniversityNanjing 210093China Research Institute of Shenzhen Nanjing UniversityShenzhen 518057China State Key Laboratory of Wide-Bandgap Semiconductor Power Electric Devices The 55th Research Institute of China Electronics Technology Group CorporationNanjing 210016China

Ni/β-Ga_2 O_3 lateral Schottky barrier diodes(SBDs) were fabricated on a Sn-doped quasi-degenerate n^+-Ga_2 O_3(201)bulk substrate. The resultant diodes with an area of 7.85 ×10^(-5) cm^2 exhibited excellent rectifying characteristics with an ideality factor of 1.21, a forward current density(J) of 127.4 A/cm2 at 1.4 V, a specific on-state resistance(R_(on,sp)) of1.54 mΩ·cm^2,and an ultra-high on/off ratio of 2.1 ×10^(11) at±1 V. Due to a small depletion region in the highly-doped substrate, a breakdown feature was observed at-23 V, which corresponded to a breakdown field of 2.1 MV/cm and a power figure-of-merit(VB2/R_(on)) of 3.4×10~5 W/cm^2. Forward current-voltage characteristics were described well by the thermionic emission theory while thermionic field emission and trap-assisted tunneling were the dominant transport mechanisms at low and high reverse biases, respectively, which was a result of the contribution of deep-level traps at the metal-semiconductor interface. The presence of interfacial traps also caused the difference in Schottky barrier heights of 1.31 eV and 1.64 eV respectively determined by current-voltage and capacitance-voltage characteristics. With reduced trapping effect and incorporation of drift layers, the β-Ga_2 O_3 SBDs could further provide promising materials for delivering both high current output and high breakdown voltage.

关键词： β-Ga2O3 Schottky diode transport mechanism quasi-degeneration rectifier

Backend Process for Cylindrical Ru/Ta2O5/Ru Capacitor for Future DRAM

在线全文

学校读者我要写书评

暂无评论

Backend Process for Cylindrical Ru/Ta2O5/Ru Capacitor for Fu...

Effect of weld faying part groove shape on reduction of inner flash in steel pipe joints fabricated by friction welding

2001 6～(th) International Conference on Solid-State and Integrated Circuit technology

作者： J.Lin T.Suzuki H.Minakata A.Shimada K.Tsunoda M.Fukuda T.Kurahashi Y.Fukuzumi A.Hatada A.Sato P.H.Sun Y.Ishibashi H.Tomita N.Nishikawa E.Ito W.C.Liu C.M.Chu R.Suzuki M.Nakabayashi D.Matsunaga K.Hieda K.Hashimoto S.Nakamura Y.Kohyama C.M.Shiah technology Development Division Fujitsu Limited Fujitsu Laboratories Limited Memory LSI R&D Center Toshiba Corporation DRAM Process Integration and Module technology Department Winbond Electronics Corporation Process&Manufacturing Engineering Center Toshiba Corporation

A novel backend process is developed for thecylindrical Ru/TaO/Ru capacitor for 130nm generationDRAMs to achieve good electrical *** gas(3%H/97%N)anneal(FGA) induceddegradation can be effectively *** thecylindrical Ru/TaO/Ru capacitor with full backendprocesses,including passivation layer formation and aFGA,the cell leakage current and cell capacitance are1fA(at±0.8V at 85℃)and 15fF,respectively.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Advances in Manufacturing 2019年第4期7卷 411-422页

作者： M.Kimura S.Iwamoto M.Kusaka K.Kaizu Y.Nakatani M.Takahashi Department of Mechanical Engineering Graduate School of EngineeringUniversity of Hyogo2167 ShoshaHimejiHyogo 671-2280Japan toshiba Energy Systems&Solutions corporation 2-4 Suehiro-choTsurumi-kuYokohamaKanagawa 230-0045Japan Department of Mechanical Engineering Faculty of EngineeringNishinippon Institute of Technology1-11 NiitsuKanda-machiMiyako-gunFukuoka 800-0394Japan

The groove shape of the weld faying part was investigated to obtain an ideal pipe frictiowelded joint that had a fracture in the base metal and no inner flash of *** steel pipe had inner and outer diameters of 8.0 mm and 13.5 mm,respectively,and the weld faying surface was of a basic flat shape(butt)***,stepped and tapered groove shapes were *** groove shapes were welded with a friction speed of 27.5 s_1 and a friction load of 2.79 *** phenomena during the welding process were observed,and the tensile strength of joints was *** joints,that fabricated with flat or step groove shapes,made with a friction time at which the friction torque reached the initial peak did not have the tensile strength of the base metal nor a fracture in the base ***,the joints fabricated with a friction time that reached past the initial peak had a large flash,and they contained a fracture in the base *** contrast,when joints were made with a gently tapered groove shape with a friction time reaching the time of the initial peak,they achieved a fracture in the base metal,despite having an extremely small inner ***,the shape at the weld faying part was capable of reducing the flash exhausted from the weld interface.

关键词： Friction welding Steel pipe Inner flash Groove shape Taper Joint strength Fracture