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Effect of the processing route on the microstructure and mechanical behavior of superlight Mg-9Li-1Zn alloy via friction stir processing

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Journal of Magnesium and Alloys 2022年第11期10卷 3064-3081页

作者： Mengran Zhou Zhuoran Zeng Chun Cheng Yoshiaki Morisada Qingyu Shi jian-yih wang Hidetoshi Fujii Joining and Welding Research Institute(JWRI) Osaka UniversityOsakaJapan Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China State Key Laboratory of Tribology Tsinghua UniversityBeijingChina Key Laboratory for Advanced Materials Processing Technology Ministry of Education of China Tsinghua UniversityBeijing 100084China College of Engineering and Computer Science Australian National UniversityACT 2601Australia Department of Materials Science and Engineering National Dong-Hwa UniversityHwa-LianTaiwanChina

In this study, the effect of the processing route using a friction stir processing(FSP) method on the microstructure and mechanical behavior of a Mg-9Li-1Zn alloy was systematically investigated. In the FSP method, the odd-numbered(1st and 3rd) process directions and even-numbered(2nd and 4th) passes were alternated to distribute the strain throughout the whole processed zone uniformly. Consequently, the processed zone had a much more uniform microstructure and hardness distribution than the processed zone obtained using the conventional FSP method. Using this method, the grain size of a Mg-9Li-1Zn sheet alloy was refined from ~31 μm to ~0.21 μm with uniformly distributedα and β phases. The processed alloy exhibited a high strength-ductility synergy with an ultimate tensile strength(UTS) of 220.1 MPa and total elongation of 70.0% at a strain rate of 10^(-3)s^(-1), overwhelmingly higher than those of the base metal, 155.6 MPa in UTS and 36.0%in elongation. The in-situ SEM-DIC analysis and TEM observation demonstrated that such an outstanding ductility with moderate strength is caused by grain boundary sliding, the dominant deformation mechanism of the ultra-fine-grained sample after FSP. The processing route with reverse processing direction was proven to be efficient in producing the ultrafine grain size microstructure and improving the mechanical properties of superlight Mg-9Li-1Zn alloy.

关键词： Mg-Li-Zn alloy Friction stir processing Microstructure In-situ SEM-DIC Mechanical properties

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Microstructural Characterization and Mechanical Behavior of an Mg-9%Li-1%Zn Alloy

Microstructural Characterization and Mechanical Behavior of ...

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Second International Conference on Magnesium(ICM 2006)

作者： Chui-Hung Chiu jian-yih wang Horng-Yu Wu Material and Chemical Research Laboratories Industrial Technology Research InstituteHsinchuTaiwan 31015China Institute of Engineering ScienceChung Hua UniversityHsinchuTaiwan 30012China Department of Materials Science and Engineering National Dong Hua UniversityHualienTaiwan 97401China

The hardening of the Mg-9%Li-1%Zn alloy does not depend strongly on precipitation through aging, but cold rolling is moderately effective. The Mg-9%Li-1%Zn alloy had a dual phase structure with dis

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High-rate electrochemical H_(2)O_(2) production over multimetallic atom catalysts under acidic–neutral conditions

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Carbon Energy 2024年第1期6卷 44-62页

作者： Yueyu Tong Jiaxin Liu Bing-jian Su Jenh-yih Juang Feng Hou Lichang Yin Shi Xue Dou Ji Liang Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjinChina Institute for Superconducting and Electronic Materials University of WollongongInnovation CampusNorth WollongongNew South WalesAustralia Department of Electrophysics National Chiao Tung UniversityHsinchuTaiwanChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyangLiaoningChina Institute of Energy Materials Science University of Shanghai for Science and TechnologyShanghaiChina

Hydrogen peroxide(H_(2)O_(2))production by the electrochemical 2-electron oxygen reduction reaction(2e−ORR)is a promising alternative to the energy-intensive anthraquinone process,and single-atom electrocatalysts show the unique capability of high selectivity toward 2e−ORR against the 4e−one.The extremely low surface density of the single-atom sites and the inflexibility in manipulating their geometric/electronic configurations,however,compromise the H_(2)O_(2) yield and impede further performance enhancement.Herein,we construct a family of multiatom catalysts(MACs),on which two or three single atoms are closely coordinated to form high-density active sites that are versatile in their atomic configurations for optimal adsorption of essential*OOH species.Among them,the Cox–Ni MAC presents excellent electrocatalytic performance for 2e−ORR,in terms of its exceptionally high H_(2)O_(2) yield in acidic electrolytes(28.96 mol L^(−1) gcat.^(−1) h^(−1))and high selectivity under acidic to neutral conditions in a wide potential region(>80%,0–0.7 V).Operando X-ray absorption and density functional theory analyses jointly unveil its unique trimetallic Co2NiN8 configuration,which efficiently induces an appropriate Ni–d orbital filling and modulates the*OOH adsorption,together boosting the electrocatalytic 2e−ORR capability.This work thus provides a new MAC strategy for tuning the geometric/electronic structure of active sites for 2e−ORR and other potential electrochemical processes.

关键词： hydrogen peroxide production multiatom catalysts operando X-ray adsorption spectrum reaction mechanism tendency structure-property relation

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Synthesis and structure of ammonium tricupric(II)-octadecatungsto-diantimonate(III)

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Acta Chimica Sinica English Edition 1989年第4期7卷 356-364页

作者： DING jian-Ping yih-Tong KU (GU Yi-Dong) wang Bu-Yi Department of Chemistry Fudan UniversityShanghaiWU Guang Center of Analysis and Test Fudan UniversityShanghai

This paper reports the synthesis, properties and structure of (NH_4)_(12)[Cu_3(H_2O)_3(SbW_9O_33)_2]· 11H_2O. The compound was prepared by the depolymerization reaction of (NH4_)_(18)[(NH_4)Sb_9W21O_(86)]. nH_2O,which was proposed firstly as a method of preparing new heteropoly tungstoantimonate(Ⅲ). Its properties were characterized by IR, Raman, UV-VS spectra, TG-DTA thermal analysis, and X-ray single ctystal analysis. The crystal is orthorhombic, with space group D_(2h)^(16)-Pnma. The crystal data are: a=15.423(4), b=19.307(6), c=30.275(6), V=9015.0~3, Z=4, Dc=3.881 g/cm_3. The structure has been refined by full-matrix least squares method to a final R factor of 0.064 for 2652 reflections collected at room temperature. The heteropoly anion contains two a-B-SbW_9O_(33) subunits joined by three square-pyramidal CuO_4(OH_2).

关键词： Synthesis and structure of ammonium tricupric octadecatungsto-diantimonate II III

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Identification of Grown-In Defects in CZ Silicon after Cu Decoration

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Microscopy Research 2017年第2期5卷 11-19页

作者： Kun-Lin Lin Yi-Ling jian Che-Yu Lin Chien-Cheng Lin yih-Rong Luo Chien-Chia Tseng National Nano Device Laboratories National Applied Research Laboratories Taiwan Department of Materials Science and Engineering National Chiao Tung University Taiwan AUO Crystal Corporation Taiwan

Bulk Czochralski silicon crystals were decorated with Cu and characterized by transmission electron microscopy (TEM) with energy-dispersive spectroscopy (EDS), atomic force microscopy (AFM), optical microscopy (OM), scanning electron microscopy (SEM), and photoluminescence spectroscopy (PL). The vacancy-type core, oxidation-induced stacking faults (OISF) ring, nearly defect-free ring, and self-interstitial-type rich outer ring were delineated in the Si crystal wafer. At the surface of the Si crystal, vertical-horizontal line (V-H line) defects and windmill defects (W-defects) were formed instead of OISF. The families of growth planes and directions were expressed as {011} and for the V-H line and {010} and for W-defects, respectively. In addition to V-H line defects and W-defects, pits or voids and Si oxide with dissolved Cu were found in the Si crystal wafer.

关键词： CZ Silicon Cu Decoration Microstructures Defects Transmission Electron Mi-croscopy

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A new prognostic histopathologic classification of nasopharyngeal carcinoma

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Chinese Journal of Cancer 2016年第6期35卷 30-45页

作者： Hai-Yun wang yih-Leong Chang Ka-Fai To Jacqueline S.G.Hwang Hai-Qiang Mai Yan-Fen Feng Ellen T.Chang Chen-Ping wang Michael Koon Ming Kam Shie-Lee Cheah Ming Lee Li Gao Hui-Zhong Zhang Jie-Hua He Hao jiang Pei-Qing Ma Xiao-Dong Zhu Liang Zeng Chun-Yan Chen Gang Chen Ma-Yan Huang Sha Fu Qiong Shao An-Jia Han Hai-Gang Li Chun-Kui Shao Pei-Yu Huang Chao-Nan Qian Tai-Xiang Lu Jin-Tian Li Weimin Ye Ingemar Ernberg Ho Keung Ng Joseph T.S.Wee Yi-Xin Zeng Hans-Olov Adami Anthony T.C.Chan jian-Yong Shao State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer Medicine Sun Yat-sen University Cancer Center Department of Molecular Diagnostics Sun Yat-sen University Cancer Center Department of Pathology National Taiwan University HospitalNational Taiwan University College of Medicine Department of Anatomical and Cellular Pathology Hong Kong Cancer Institute and Sir YK Pao Centre for CancerFaculty of MedicineThe Chinese University of Hong Kong Department of Pathology Singapore General Hospital Department of Nasopharyngeal Carcinoma Sun Yat-sen University Cancer Center Department of Pathology Sun Yat-sen University Cancer Center Division of Epidemiology Department of Health Research and PolicyStanford University School of Medicine Health Sciences Practice ExponentInc. Department of Otolaryngology National Taiwan University HospitalNational Taiwan University College of Medicine Department of Clinical Oncology Hong Kong Cancer Institute and Sir YK Pao Centre for CancerFaculty of MedicineThe Chinese University of Hong Kong Division of Radiation Oncology National Cancer CenterSingapore Department of Radiation Oncology Cancer Institute and HospitalChinese Academy of Medical Sciences Department of Radiation Oncology The Affiliated Hospital of Bengbu Medical College Department of Pathology Cancer Institute and HospitalChinese Academy of Medical Sciences Department of Radiation Oncology Guangxi Medical University Department of Pathology Hunan Provincial Cancer Hospital Department of Radiation Oncology Sun Yat-sen University Cancer Center Department of Pathology Fujian Provincial Cancer Hospital Department of Pathology The First Affiliated HospitalSun Yat-sen University Department of Pathology Sun Yat-sen Memorial HospitalSun Yat-sen University Department of Pathology The Third Affiliated HospitalSun Yat-sen University Department of Experiment Research Sun Yat-sen University Cancer Center Department of Medical Epidemiology and Biostatistics Karolinska Institutet Departments of Mi

Background:The current World Health Organization(WHO) classification of nasopharyngeal carcinoma(NPC) con?veys little prognostic information.This study aimed to propose an NPC histopathologic classification that can poten?tially be used to predict prognosis and treatment response.Methods:We initially developed a histopathologic classification based on the morphologic traits and cell differentia?tion of tumors of 2716 NPC patients who were identified at Sun Yat?sen University Cancer Center(SYSUCC)(training cohort).Then,the proposed classification was applied to 1702 patients(retrospective validation cohort) from hospitals outside SYSUCC and 1613 patients(prospective validation cohort) from SYSUCC.The efficacy of radiochemotherapy and radiotherapy modalities was compared between the proposed subtypes.We used Cox proportional hazards models to estimate hazard ratios(HRs) with 95% confidence intervals(CI) for overall survival(OS).Results:The 5?year OS rates for all NPC patients who were diagnosed with epithelial carcinoma(EC;3708 patients),mixed sarcomatoid?epithelial carcinoma(MSEC;1247 patients),sarcomatoid carcinoma(SC;823 patients),and squamous cell carcinoma(SCC;253 patients) were 79.4%,70.5%,59.6%,and 42.6%,respectively(P < 0.001).In mul?tivariate models,patients with MSEC had a shorter OS than patients with EC(HR = 1.44,95% CI = 1.27–1.62),SC(HR = 2.00,95% CI = 1.76–2.28),or SCC(HR = 4.23,95% CI = 3.34–5.38).Radiochemotherapy significantly improved survival compared with radiotherapy alone for patients with EC(HR 49–0.75),and possibly for those with SCC(HR = 0.67,95% CI = 0.56–0.80),MSEC(HR = 0.58,95% CI = 0..74–1.28).= 0.63;95% CI = 0.40–0.98),but not for patients with SC(HR = 0.97,95% CI = 0Conclusions:The proposed classification offers more information for the prediction of NPC prognosis compared with the WHO classification and might be a valuable tool to guide treatment decisions for subtypes that are associ?ated with a poor prognosis.

关键词： Nasopharyngeal carcinoma Pathologic classification Prognosis

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伊盟丘陵山区发展水保经济初探

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水土保持研究 2002年第1期9卷 98-101页

作者：张建国王青山高四宝内蒙古伊盟水土保持局伊克昭盟017000 内蒙古伊金霍洛旗水利水保局

地处黄河上中游水土流失严重地区的内蒙古伊克昭盟 ,在实施西部大开发战略中 ,根据区域优势和产业定位 ,对农牧业经济结构进行了重大战略调整 ,将伊盟丘陵山区定位于水保经济区 ,结合伊盟实际 ,对建设水保经济区的意义进行了初步探讨 ,... 详细信息

地处黄河上中游水土流失严重地区的内蒙古伊克昭盟 ,在实施西部大开发战略中 ,根据区域优势和产业定位 ,对农牧业经济结构进行了重大战略调整 ,将伊盟丘陵山区定位于水保经济区 ,结合伊盟实际 ,对建设水保经济区的意义进行了初步探讨 ,提出了加快治理水土流失 ,改善生态环境 ,促进区域经济发展的措施。

关键词：水保经济区生态环境内蒙古水土保持水土流失

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高体近红鲌的生长与繁殖

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水生生物学报 2011年第4期35卷 586-595页

作者：刘飞吴金明王剑伟中国科学院水生生物研究所武汉430072 中国科学院研究生院北京100049

高体近红鲌为长江上游的特有鱼类,以2008年5—11月从赤水河赤水市江段采集的540尾高体近红鲌标本为材料,对其生长与繁殖特性进行了研究和分析。结果表明:高体近红鲌鳞片年轮结构呈疏密切割型,年龄特征显著。种群由1—4龄共4个年龄组组成... 详细信息

高体近红鲌为长江上游的特有鱼类,以2008年5—11月从赤水河赤水市江段采集的540尾高体近红鲌标本为材料,对其生长与繁殖特性进行了研究和分析。结果表明:高体近红鲌鳞片年轮结构呈疏密切割型,年龄特征显著。种群由1—4龄共4个年龄组组成,其中以2龄个体为主。体长分布主要集中在100—160 mm;体重分布主要集中在20.0—50.0 g。总性比为♀∶♂=1.30∶1。体长与鳞径呈直线关系,体长和体重呈幂函数关系且幂指数接近3,基本符合匀速生长类型,体长和体重Von Bertalanffy方程分别为Lt=217.38(1-e-0.2867(t+0.757))和Wt=118.15[1-e-0.2867(t+0.757)]2.8103;生长拐点为2.85龄,拐点对应的体长和体重分别为Lt=140.09 mm,Wt=34.37 g。雌雄初次性成熟年龄均为1龄;繁殖高峰期为6—7月。Ⅳ期雌鱼的绝对繁殖力为950—8655粒,平均值(3087.90±1602.15)粒;体长相对繁殖力FL为10.00—56.20粒/cm,平均值(24.26±10.16)粒/cm;体重相对怀卵量FW为66.08—197.67粒/g,平均值(116.49±32.05)粒/g;卵径频率分布显示高体近红鲌为一次产卵类型。

关键词：高体近红鲌赤水河特有鱼类生长繁殖

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黑尾近红鲌含肉率及肌肉营养成分分析

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水生生物学报 2004年第3期28卷 240-246页

作者：谭德清王剑伟但胜国中国科学院水生生物研究所武汉430072

测定了长江上游特有鱼类黑尾近红的含肉率及其肌肉生化成分和能值。结果表明 :黑尾近红的含肉率为 70 74 % ;其肌肉生化成分 (鲜重百分比 )水分含量为 80 97%、蛋白质 15 92 %、脂肪 1 11%、灰分 1 0 1%、无氮浸出物 0 99%、比... 详细信息

测定了长江上游特有鱼类黑尾近红的含肉率及其肌肉生化成分和能值。结果表明 :黑尾近红的含肉率为 70 74 % ;其肌肉生化成分 (鲜重百分比 )水分含量为 80 97%、蛋白质 15 92 %、脂肪 1 11%、灰分 1 0 1%、无氮浸出物 0 99%、比能值 4 37kJ/g及E/P 2 7 4 5kJ/g。肌肉生化成分含量与体长变化无明显关系。肌肉中含有 17种氨基酸 ,总量为 6 9 0 7% (干重百分比 ) ;9种人体必需氨基酸总量是 34 81% ,必需氨基酸占氨基酸总量比例为5 0 39% ;四种鲜味氨基酸含量为 2 6 94 % ;必需氨基酸指数 (EAAI)是 6 3 6 4。缬氨酸 ,苏氨酸和异亮氨酸为限制性氨基酸。

关键词：黑尾近红鲌含肉率肌肉营养成分氦基酸

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运输密度和时间对黑尾近红鲌皮质醇、乳酸、糖元含量的影响

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水生生物学报 2020年第2期44卷 415-422页

作者：李佩陈见余登航李清王贵英魏辉杰孙仁利王守荣孙艳红武汉市农业科学院水产研究所武汉430207 武汉轻工大学动物科学与营养工程学院武汉430023

为了确定黑尾近红鲌仔稚鱼的适宜运输密度,实验选取平均体长为(27.08±3.09)mm、平均体质量为(0.11±0.04)g的黑尾近红鲌仔稚鱼作为实验对象,采用氧气袋运输,研究了不同运输密度(20、40和80 g/L)下2h、4h、6h、8h和10h后黑尾近红鲌全鱼... 详细信息

为了确定黑尾近红鲌仔稚鱼的适宜运输密度,实验选取平均体长为(27.08±3.09)mm、平均体质量为(0.11±0.04)g的黑尾近红鲌仔稚鱼作为实验对象,采用氧气袋运输,研究了不同运输密度(20、40和80 g/L)下2h、4h、6h、8h和10h后黑尾近红鲌全鱼皮质醇、乳酸、糖元含量及氧气袋内水质的变化。结果显示:运输后各组黑尾近红鲌的平均存活率均在99%以上,但不同密度之间差异显著(P0.05);各组全鱼糖元含量在运输2h时显著降低(P0.05)。运输密度和时间对黑尾近红鲌鱼苗的全鱼皮质醇、存活率、水体总氨氮和溶解氧的影响存在显著交互作用。

关键词：黑尾近红鲌运输密度运输时间皮质醇糖元乳酸氨氮溶氧

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