检索结果-南通市图书馆

Ballistic performance of titanium-based layered composites made using blended elemental powder metallurgy and hot isostatic pressing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

DEFENCE technolOGY 2024年第9期39卷 1-14页

作者： Markovsky, Pavlo Janiszewski, Jacek Savvakin, Dmytro Stasyuk, Oleksandr Fikus, Bartosz Samarov, Victor Ellison, Vianey Prikhodko, Sergey, V NAS Ukraine GV Kurdyumov Inst Met Phys 36Academician Vernadsky Blvd UA-03142 Kyiv Ukraine Jaroslaw Dabrowski Mil univ technol 2Gen Sylwester Kaliski Str PL-00908 Warsaw 46 Poland Synertech Inc 11711 Monarch St Garden Grove Los Angeles CA 92841 USA univ Calif Los Angeles Dept Mat Sci & Engn Los Angeles CA 90095 USA

Metal matrix composites tiles based on Ti-6Al-4V (Ti64) alloy, reinforced with 10, 20, and 40 (vol%) of either TiC or TiB particles were made using press-and-sinter blended elemental powder metallurgy (BEPM) and then bonded together into 3-layer laminated plates using hot isostatic pressing (HIP). The laminates were ballistically tested and demonstrated superior performance. The microstructure and properties of the laminates were analyzed to determine the effect of the BEPM and HIP processing on the ballistic properties of the layered plates. The effect of porosity in sintered composites on further diffusion bonding of the plates during HIP is analyzed to understand the bonding features at the interfaces between different adjacent layers in the laminate. Exceptional ballistic performance of fabricated structures was explained by a significant reduction in the residual porosity of the BEPM products by their additional processing using HIP, which provides an unprecedented increase in the hardness of the layered composites. It is argued that the combination of the used two technologies, BEPM and HIP is principally complimentary for the materials in question with the abilities to solve the essential problems of each used individually.

关键词： Metal matrix composites Powder metallurgy Titanium hydride powder Master alloy Titanium carbide Titanium boride Hot isostatic pressing Ballistic tests TI-6AL-4V ALLOY TIB COMPOSITES ARMOR STEELS BEHAVIOR MICROSTRUCTURE PROJECTILES AEROSPACE

Non-invasive Healthcare Analytical Platform Based on Organic Electrochemical Transistors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CHEMICAL RESEARCH IN CHINESE univERSITIES 2024年第5期40卷 824-841页

作者： Hu, Xingyu Mao, Ning Yan, Xinwen Huang, Ling Liu, Xu Yang, Huige Sun, Qingqing Liu, Xuying Jia, Hanyu Zhengzhou univ Sch Mat & Engn Zhengzhou 450001 Peoples R China Longmen Lab Sci & Technol Innovat Ctr Adv Mat Intelligent Equi Luoyang 471000 Peoples R China South Cent univ Nationalities Hubei R&D Ctr Hyperbranched Polymers Synth & Appli Key Lab Catalysis & Energy Mat Chem Minist Educ Wuhan 430074 Peoples R China South Cent univ Nationalities Hubei R&D Ctr Hyperbranched Polymers Synth & Appli Hubei Key Lab Catalysis & Mat Sci Wuhan 430074 Peoples R China

Non-invasive bioelectronics, especially organic electrochemical transistors (OECTs), have drawn extensive attentions of academical and medical communities by virtue of their efficient bio-electronic interfacing, water-involved ionic transport, excellent ionic-electronic coupling, ultralow power consumption, wide detectable range, and outstanding detection sensitivity. Designable structure diversity, low-temperature solution processability, facile bio/chemical functionalization, and excellent biocompatibility of organic mixed ionic-electronic conductors (OMIECs) render OECTs particularly suitable for non-invasive or minimally invasive healthcare analytical platform. Here, we comprehensively review recent advances of the non-invasive analytical healthcare applications based on OECTs, especially on the detection of biomarkers or metabolites in the excretory biofluids, as well as the recording of electrophysiological signals. A brief introduction of OECT and its comparison with other organic thin-film transistors upon device configuration and working mechanism are firstly discussed. State-of-the-art non-invasive OECT-based biosensors are summarized on their detection of ionic and molecular biomarkers, following with circuit design strategies of OECTs for real-time and in-situ electrophysiological recording from skin surface. In conclusion, remaining barriers and future challenges of non-invasive OECT-based bioelectronics towards lower detection limit, more accurate quantitative relationship between analyte concentrations and measured parameters, more intimate device-tissue interface, and long-term operation stability are deeply analyzed with a critical outlook.

关键词： Organic electrochemical transistor Non-invasive Bioelectronics Ion-selective Electrophysiological monitoring SENSITIVITY ION DETECTION

Dietary black soldier fly oil enhances growth performance, flesh quality, and health status of largemouth bass (Micropterus salmoides)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ANIMAL NUTRITION 2024年第3期18卷 234-245页

作者： Yuan, Hailin Hu, Junru Li, Xiangce Sun, Qiuxuan Tan, Xiaohong You, Cuihong Dong, Yewei Huang, Yanhua Zhou, Meng Zhongkai univ Agr & engn Innovat Inst Anim Hlth Breeding Coll Anim Sci & Technol Guangzhou 510225 Guangdong Peoples R China Guangzhou Key Lab Aquat Anim Dis & Waterfowl Breed Guangzhou 510225 Guangdong Peoples R China Guangdong Prov Water Environm & Aquat Prod Secur E Guangzhou 510225 Guangdong Peoples R China Guangdong Prov Key Lab Anim Breeding & Nutr Res Guangzhou 510640 Guangdong Peoples R China

The study aimed to assess the effects of dietary black soldier fly oil (BSFO) on the growth performance, flesh quality, and health status of largemouth bass (Micropterus salmoides). Six iso-nitrogenous and isolipid diets were formulated by substituting fish oil and soybean oil (1/2, wt/wt) with BSFO in percentages of 0%, 20%, 40%, 60%, 80%, and 100%, respectively. The diets were fed to 960 fish (initial body weight = 16.5 g) in four replicates for 8 weeks. Indicators related to growth performance, body composition, hematology, flesh quality, expression of genes related to inflammatory cytokines and apoptosis, and the response of fish to Aeromonas veronii challenge were analyzed. The results showed that the weight gain rate was numerically improved in all BSFO substitution groups, ranging from 9.3% to 44.0% compared to the control group. The highest survival rate and the lowest hepatosomatic index and condition factor were observed in the BFSO20 group. In terms of flesh quality, the water-holding capacity of the dorsal muscle was elevated with higher levels of dietary BSFO. However, significant changes in texture properties (cohesiveness, gluing, and chewiness) were observed in the BSFO20 group (P < 0.05). Six hematological parameters related to glycolipid and liver function were optimized in most of the BFSO substitution groups. Furthermore, the expressions of six inflammation- and apoptosis-related genes (IL-1 beta, Bcl-xl, BAX, caspase8, TNF-alpha, and IL-10) were significantly affected by dietary BSFO (P < 0.05). Following bacterial challenge, the seven-day cumulative survival rates of fish were considerably increased from 10.0% in the control group to 60.0% and 66.7% in the BSFO80 and BSFO100 groups, respectively. One-variable linear regression analysis revealed that various parameters related to fish growth, flesh quality, and health status were significantly influenced by dietary BSFO substitution levels in a dose-dependent manner (P < 0.05). In conclusion, su

关键词： Micropterus salmoides Black soldier fly oil (BSFO) Growth performance Flesh quality Health status FATTY-ACID PROFILES HERMETIA-ILLUCENS RAINBOW-TROUT SOYBEAN OIL CELL-DEATH CASPASES FILLETS LARVAE MEAL

Effect of the Deformation Twin Density on the Corrosion Behavior in TWIP Steel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第S1期18卷 331-336页

作者： CHU Guo-dong,WEI Ying-hui,LI Da-zhao,TIAN Yun (College of Materials science and Engineering,Taiyuan university of technology,Taiyuan 030024,shanxi,China) Taiyuan univ technol Coll Mat Sci & Engn Taiyuan 030024 Shanxi Peoples R China

Based on its excellent tensile strength-ductility property combination,twinning-induced plasticity (TWIP) steel shows great potential in applications for structural components in automobile *** aim of this research is to investigate the corrosion resistance properties and corrosion mechanism under room temperature in TWIP *** influence of the deformation twin density on corrosion property was primarily considered by salt spray *** specimens used in the investigation are as-annealed and as-deformed *** microstructure and corrosion resistance property were characterized by scanning electron microscope (SEM),optical microscope (OM) and so *** are some annealing twins distributed randomly in austenitic grains in the as-annealed *** the specimen was subjected to tensile experiment,the density of the deformation twins increased sharply,which are different from the annealing twins in size and *** was found that the corrosion potential of the as-annealed is lower than that of the as-deformed and the corrosion current density behaves *** immersed in 5% NaCl solution salt spray for 48h,the as-deformed showed a bit better than the as-annealed in corrosion *** the time prolonged,the gap between the two specimens in corrosion resistance increased *** corrosion morphologies varied in color and *** investigation,carried out by SEM and EDS,indicated that as-annealed and the as-deformed followed pitting corrosion and uniform corrosion mechanism *** reason for the difference in corrosion mechanism is possibly the presence of the deformation *** deformation twins formed during the tensile test refine grains by way of *** twin boundaries largely belong to the coincidence site lattice (CSL),which is on lower energy *** suggests that the twins not only play a role in strengthening,but also improve effectively the corrosion resistance in TWIP steel.

关键词： TWIP steel corrosion deformation twin

Indeterminacy-aware service selection for reliable service composition

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer science 2011年第1期5卷 26-36页

作者： Xiaoqin Fan (1) fxq0917@*** Xianwen Fang (2) Zhijun Ding (3) shanxi univ Comp & Informat Technol Sch Taiyuan 030006 Peoples R China Anhui univ sci & technol Dept Informat & Comp Sci Huainan 232001 Peoples R China Tongji univ Dept Comp Sci & Engn Shanghai 201804 Peoples R China

With the development of Intemet and Web service technology, Web service composition has been an effective way to construct software applications; service selection is the crucial element in the composition process. However, the existing selection methods mostly generate static plans since they neglect the inherent stochastic and dynamic nature of Web services. As a result, Web service composition often inevitably terminates with failure. An indeterminacy-aware service selection algorithm based on an improved Markov decision process （IMDP） has been designed for reliable service composition, but it suffers from higher computation complexity. Therefore, an efficient method is proposed, which can reduce the computation cost by converting the service selection problem based on IMDP into solving a nonhomogeneous linear equation set. Experimental results demonstrate the success rate of service composition has been improved greatly, whilst also reducing computation cost.

关键词： Web service reliable service composition,service selection quality of service (QoS)

Banded Microstructure Formation and Its Effect on the Performance of 06Ni9 Steel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第S1期18卷 325-330页

作者： LIU Dong-feng 1,2,WANG Zheng-guo 1,WEI Ying-hui 1,CUI Tian-xie 2,PAN Qi-fa 2,HOU Li-feng 1 (1.School of Material science and Engineering,Taiyuan university of technology,Taiyuan 030024,shanxi,China 2.Technical Center,Taiyuan Iron and Steel Group Co ltd,Taiyuan 030024,shanxi,China) Taiyuan univ technol Sch Mat Sci & Engn Taiyuan 030024 Shanxi Peoples R China Taiyuan Iron & Steel Grp Co Ltd Ctr Tech Taiyuan 030024 Shanxi Peoples R China

Focusing on the banded microstructure formed during the production of 06Ni9 steels for cryo-LNG,this paper examines its formation,distribution of alloying elements,structure,hardness,and low-temperature *** results show that the banded microstructure formed after hot-rolling and cooling of the steel binct in which the element segregation occurred during *** phase change during heat treatment also can cause the formation of the banded microstructure of 06Ni9 *** white bands are mainly composed of ferrite and reversed austenite,and the black bands are mainly composed of reversed austenite and a certain amount of *** segregation and formation of more carbide caused some black regions to *** refinement of 06Ni9steel is beneficial to the formation of reversed austenite,the redistribution of alloying elements,improving the stability of austenite and the low-temperature toughness of *** steel easily undergoes nickel segregation;thus,undergoing a secondary quenching and tempering process is *** refinement of martensite quenching above A c3,the martensite that is rich in nickel and carbon,residual austenite and a few little of ferrite after secondary quenching lower than A c3 are beneficial to the formation of high stability ***,this can meet the strength and toughness requirement of the low temperature 06Ni9 steel.

关键词： 06Ni9 steel banded microstructure reversed austenite

Influence of Mg and Ti on the microstructure and electrochemical performance of aluminum alloy sacrificial anodes

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2009年第2期28卷 187-192页

作者： Ma Jingling Wen Jiuba Li Xudong Zhao Shengli Yan Yanfu Lanzhou univ technol Sch Mat Sci & Engn Lanzhou 730050 Peoples R China Henan univ sci & technol Sch Mat Sci & Engn Luoyang 471003 Peoples R China

The experiments focused on the influence of magnesium and titanium as additional alloying elements on the microstructure and electro-chemical behavior of Al-Zn-In sacrificial anodes. The electrochemical behavior of the aluminum sacrificial anode with 3 wt.% sodium chloride solution was studied by electrochemical impedance spectroscopy (EIS) tests. It was found that a microstructure with few precipitates and refined grains could be achieved by adding 1 wt.% Mg and 0.05 wt.% Ti to the Al-Zn-In alloy,resulting...

关键词： aluminum alloy sacrificial anode electrochemical performance microstructure

Hot Deformation and Modeling of Flow Stress for a Ti-containing HSLA Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Materials science & technology 1998年第5期14卷 419-424页

作者： Xu, Yourong Hou, Dahua Wang, Deying Xu, W-Ping Shanghai univ sci & technol Sch Mat Sci & Engn Shanghai 201800 Peoples R China

Single stage and double-stage interrupted hot compression tests for simulating hot rolling have been carried out for a Ti-containing HSLA steel (10Ti). Physical simulation of hot rolling was in progress utilizing a Thermecmastor-Z simulator in 850-1150 degree C and strain rate of 0.1-60 s** minus **1. A model for residual strain ratio lambda was designed, and a model of flow stress considering residual strain has been obtained. The hot deformation behavior at various strain rate has also been studied. (Edited author abstract) 13 Refs.

关键词： Steel

Continuous unidirectional solidification of QAl9-4 Cu-Al alloy

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1999年第3期9卷 493-499页

作者： Chang Guowei(常国威) Yuan Junping(袁军平) Wang Zidong(王自东) Wu Chunjing(吴春京) Hu Hanqi(胡汉起) Miao Zhimin(苗治民) Beijing univ sci & technol Sch Mat Sci & Engn Beijing 100083 Peoples R China

A continuous unidirectional solidification equipment with the advantages of electric slag remelting, induction heating, continuous casting and unidirectional solidification was built to study the QAl9 4 Cu Al alloy. The results show that the electro slag induction continuous unidirectional solidification process can be used for the steady continuous unidirectional solidification of QAl9 4, and revitalizes the down pulling continuous unidirectional solidification process; that the temperature distribution in the mold wall reflects that of the molten metal in the mold, thus the temperature distribution in the mold wall can be used to control the electric slag induction continuous unidirectional solidification process; and that the mutual matching of the technological parameters is the key to stabilize the solidification process.

关键词： QAl9 4 Cu Al alloy continuous casting electro slag remelting unidirectional solidification