Search Results 1-20 of 2381

  • Crystallinity of fiber-formed nanostructure on tungsten surface with the exposure of helium plasma  [in Japanese]

    髙村 秀一 , 岩田 博之 , 青田 達也 , 上杉 喜彦 , 前中 志郎 , 藤田 和宣

    … In addition, a small angle incident X-ray diffraction technique gives information on intensity distribution among contributions of different crystal orientation families and a difference between surface fuzz layer and the basing tungsten bulk surface with helium defects. … Temporal fearless conclusion is that the crystallinity of nano-fibers would be the same as that of bulk α-tungsten although the grain size of nano-fibers is much smaller than those in bulk materials. …

    愛知工業大学研究報告 = Bulletin of Aichi Institute of Technology (54), 77-83, 2019-03-31

    IR

  • Model of ballistic-diffusive thermal transport in HAMR media

    Lyberatos Andreas , Parker Gregory

    … A model is presented that considers the grain size and temperature dependence of the thermal conductivity and specific heat of L1<inf>0</inf>FePt nanoparticles and is applied to study the temperature distribution within the top recording layer in heat assisted magnetic recording. … Ballistic effects on the thermal conductivity are included assuming diffuse scattering of the electron heat carriers at interfaces and grain boundaries. …

    Jpn. J. Appl. Phys. 58(4), 045002, 2019-03-28

    JSAP DOI

  • Study on the conservation of Glehnia littoralis F. Schmidt ex Miq. in Ajigasawa (1) Native Habitat and Grain-Size Distribution of Surface Sediment  [in Japanese]

    勝川 健三 , 赤平 江莉香 , 蝦名 泰智 , 盛 眞知子

    ハマボウフウの保全を目的に,青森県鯵ヶ沢町を対象として,自生地の調査および自生地を構成する粒子の粒度分析を行った。ハマボウフウは,牛島地区の砂質海岸および赤石川河口に群落を,南浮田地区の鳴沢川河口に点在自生を確認した。七里長浜地区に自生はみられなかった。また,ハマボウフウが自生できる立地環境に粒度組成が関与している可能性を示し,先行研究と調和的であったことを示した。すなわち,礫質海岸ではその水分保 …

    弘前大学教育学部紀要 (121), 109-112, 2019-03-28

    IR

  • Evaluation of the Hydraulic Permeability of the Riverbed Gravel-Sand  [in Japanese]

    MORII Toshihiro , OKOSHI Masahito

    <p>大規模河川の既設頭首工において河床砂礫を採取し, 水路を用いた室内試験により透水性を調べた.Forchheimer式で表される非線形な透水性(水頭損失特性)を有するとした.ダルシー式の透水係数と比較することにより, 非線形性の程度がそれほど強くなく, かつ透水性のオーダーが通常の砂ないし砂利のそれと同程度であることを示した.これより, 粗礫と石分を多量に含むにもかかわらず, 河床 …

    Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 87(1), II_65-II_70, 2019

    J-STAGE

  • Evaluation of K<sub>3</sub>Fe(CN)<sub>6</sub> on Deposition Behavior and Structure of Electroless Copper Plating

    LU Jianhong , WANG Mingyong , DENG Xiaomei , YAN Jianhei , YUN Jimmy , JIAO Shuqiang

    … stabilizer revealed that surface structures and fine particle distribution were uniform. … was favorable to the formation of the preferred orientation on (220) crystal plane, and the grain size decreased from 61.5 nm to 40.4 nm with the addition of 50 mg L<sup>−1</sup> …

    Electrochemistry, 2019

    J-STAGE

  • Effect of Sc and Zr on Al<sub>6</sub>(Mn,Fe) Phase in Al–Mg–Mn Alloys

    Luo Xier , Fang Hongjie , Liu Hui , Yan Yang , Zhu Hualong , Yu Kun

    … <p>The effects of Sc and Zr on the shape, size, and number density of Al<sub>6</sub>(Mn,Fe) phase in Al–5Mg–0.7Mn alloys were investigated by this article. … The results showed that Sc and Zr can form strengthening particles of Al<sub>3</sub>Sc and Al<sub>3</sub>(Sc,Zr), which have the effect of refining grains and modifying the morphology and distribution of Al<sub>6</sub>(Mn,Fe) phase. …

    MATERIALS TRANSACTIONS 60(5), 737-742, 2019

    J-STAGE

  • Effect of Sc and Zr on Al<sub>6</sub>(Mn,Fe) Phase in Al–Mg–Mn Alloys

    Luo Xier , Fang Hongjie , Liu Hui , Yan Yang , Zhu Hualong , Yu Kun

    … <p>The effects of Sc and Zr on the shape, size, and number density of Al<sub>6</sub>(Mn,Fe) phase in Al–5Mg–0.7Mn alloys were investigated by this article. … The results showed that Sc and Zr can form strengthening particles of Al<sub>3</sub>Sc and Al<sub>3</sub>(Sc,Zr), which have the effect of refining grains and modifying the morphology and distribution of Al<sub>6</sub>(Mn,Fe) phase. …

    MATERIALS TRANSACTIONS, 2019

    J-STAGE

  • Shear-Force Based Stainless Steel Slag Modification for Chromium Immobilization

    Zhao Qing , Liu Chengjun , Cao Longhu , Jiang Maofa , Li Baokuan , Saxén Henrik , Zevenhoven Ron

    … The precipitated spinel grain size is usually smaller than 30 <i>µ</i>m, however, which limits the effectiveness of the modification. … In this study, the effects of shear force on the spinel grain size evolution under isothermal conditions and during cooling were investigated. …

    ISIJ International 59(3), 583-589, 2019

    J-STAGE

  • The effect of the starting Si powder on the sinterability and thermo-mechanical properties of sintered reaction-bonded silicon nitride

    GO Shin-Il , KO Jae-Woong , KIM Ha-Neul , KWON Se-Hun , KIM Hai-Doo , PARK Young-Jo

    … <p>The effects of the size of Si powder on the thermal conductivity and strength of sintered reaction-bonded silicon nitride (SRBSN) were investigated. … Si powders with various sizes were prepared by controlling the high-energy milling duration of the starting Si powder, where the median Si size varied from 3.97 to 0.62 µm, corresponding to an oxygen content of 0.54 to 2.57 wt %. …

    Journal of the Ceramic Society of Japan 127(3), 136-142, 2019

    J-STAGE

  • Effect of V<sub>2</sub>O<sub>5</sub> Addition on Oxidation Induration and Swelling Behavior of Chromium-Bearing Vanadium Titanomagnetite Pellets with Simulated Coke Oven Gas Injection into Blast Furnace

    Tang Wei Dong , Yang Song Tao , Xue Xiang Xin

    … The proportion of microsize pore size distribution of CVTP between 0 to 5 µm decreases notably while the pore size distribution between 5 to 30 µm increases with increasing V<sub>2</sub>O<sub>5</sub> … The V-bearing spinels on the grain boundaries with fragmentized and prismatic structure restrain the CS of CVTP. …

    ISIJ International, 2019

    J-STAGE

  • Effect of Heating Rate on Microstructure, Texture and Tensile Properties of AA7085

    Yang Qunying , Liu Xiaoyong , Fan Xiangze

    … AA7085 alloy during solution treatment were investigated in the temperature range of 350 to 500°C with heating rates of 1 and 600°C/min. The results show that the alloy sheet solution treated with rapid heating rate exhibits a finer grain structure and narrower grain size distribution compared to the alloy sheet solution treated with slow heating rate, indicating that driving force is more important than sub-boundaries coalescence and mobility during rapid heating …

    MATERIALS TRANSACTIONS 60(3), 464-470, 2019

    J-STAGE

  • Creep Damage Analysis of Large-Size Uniaxial Cross Weld Specimen and Circumferentially Welded Pipe of Mod.9Cr-1Mo Steel  [in Japanese]

    HONDA Takashi , FUKAHORI Takuya , TOKIYOSHI Takumi , CHUMAN Yasuharu , IGARI Toshihide

    … <p>Creep damage simulation combining a void nucleation model and damage mechanics was applied to large-size uniaxial cross weld specimen and circumferentially welded pipe of mod.9Cr-1Mo steel subject to internal pressure and bending at 650°C.The void nucleation model depending on both creep strain rate and triaxiality factor considers the increase of number density of creep void with a size of FGHAZ (fine-grained heat affected zone) grain of the welded joint. …

    Journal of the Society of Materials Science, Japan 68(2), 99-105, 2019

    J-STAGE

  • Unique Mechanical Properties of Harmonic Structure Designed Materials  [in Japanese]

    Ameyama Kei , Horikawa Naoki , Kawabata Mie

    … <p>Harmonic Structure (HS) has a heterogeneous microstructure consisting of bimodal grain size together with a controlled and specific topological distribution of fine and coarse grains. … This behavior is essentially related to the ability of the HS to promote a large strain hardening and uniform distribution of strain during plastic deformation, leading to improved mechanical properties by avoiding or delaying localized plastic instability. …

    Tetsu-to-Hagane 105(2), 124-126, 2019

    J-STAGE

  • Depth Distribution of Radioactive Caesium in Soil after Cultivation and the Difference by Year of the Uptake of Radioactive Caesium in Rice in Fukushima Prefecture after the 2011 Nuclear Accident

    Hai Nguyen Thanh , Tsujimoto Masaya , Miyashita Sunao , Nakashima Satoru

    <p>原子力発電所事故後の福島県での放射性セシウムの土壌から米への移行の調査を行ってきた。2013年度の調査で近接する4枚の水田のうち1枚の水田で稲穂中の放射性セシウムの濃度が上昇する傾向が認められたので,今回の2014年度~2015年度の調査でその水田の特徴を明らかにすることを目的とした。前年に耕作を行っているにもかかわらず,土壌中の<sup>137</sup> …

    RADIOISOTOPES 68(1), 13-18, 2019

    J-STAGE Ichushi Web

  • Analyzing data of organic and inorganic contents and grain size distribution of core MDG-OWK 12 collected at Oiwake area of Midagahara wetland in Mt. Tateyama, central Japan

    朴木 英治 , Hideharu Honoki

    立山の追分地内の湿原で2012年に採取したコア試料のうち,泥炭を構成要素とするコア1(表層~深さ30 cm)とコア2(深さ30~60 cm)の2サンプルについて,(1)有機物量,(2)無機物量,(3)無機粒子の粒径別の個数の3項目を2.5 mmごとに計測公開した.

    富山市科学博物館研究報告 = Bulletin of the Toyama Science Museum (42), 125-134, 2018-07-01

    IR

  • Effective Grain Force Instead of Effective Stress, and Pore Size Distribution Instead of Porosity  [in Japanese]

    杉井 俊夫 , 朱 発瑜 , 末松 知奈

    地盤工学会誌 = Geotechnical engineering magazine : 土と基礎 66(7), 14-17, 2018-07

  • Application of wavelet shrinkage to acoustic imaging of buried asari clams using high-frequency ultrasound

    Suganuma Hiroki , Mizuno Katsunori , Asada Akira

    … Acoustic imaging using high-frequency ultrasound can be an effective survey method to clarify the distribution of asari clams, which live in a relatively shallow layer of sediment. … However, the propagation of ultrasound dramatically changes depending on grain size, resulting in visibility deterioration of acoustic images. …

    Jpn. J. Appl. Phys. 57(7S1), 07LG08, 2018-06-25

    JSAP

  • A computational study of the effect of grain size distribution on shock initiation of pressed HMX powder

    Wei Yaochi , Horie Yasuyuki , Molek Christopher , Welle Eric , Zhou Min

    Science and technology of energetic materials 79(5・6), 142-145, 2018

  • POROSITY-BED VARIATION MODEL CONSIDERING GRAIN SIZE DISTRIBUTION AND SHELTERING EFFECT OF IMMOVABLE SEDIMENT  [in Japanese]

    岩見 収二 , 藤田 正治

    水工学論文集 Annual journal of Hydraulic Engineering, JSCE 63, I_1141-1146, 2018

  • THREE-DIMENSIONAL STRUCTURE OF GRAVELS MOVING AS BEDLOAD AMONG BOULDERS  [in Japanese]

    平松 裕基 , 本合 弘樹 , 関根 正人

    水工学論文集 Annual journal of Hydraulic Engineering, JSCE 63, I_913-918, 2018

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