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Homogenization on solution treatment and its effects on the precipitation-hardening of selective laser melted 17-4PH stainless steel

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Journal of Materials Science & technology 2023年第35期166卷 47-57页

作者： Sohee An du-rim Eo Il Sohn Kyunsuk Choi Department of Materials Science and Engineering Yonsei UniversitySeoul03722Republic of Korea Advanced Joining&Additive Manufacturing R&D Department Korea Institute of Industrial Technology(KITECH)529 Seohaean-roSiheung 15014Republic of Korea Department of Industry-University Convergence Hanbat National UniversityYuseongDaejeon34158Republic of Korea

17-4 precipitation-hardened(PH)stainless steel(SS)exhibits high strength and good corrosion resistance via Cu-precipitation *** conventional wrought 17-4PH SS,Cu segregation andε-Cu pre-cipitates are observed in additively manufactured(AM)17-4PH SS owing to the repeated rapid cooling after heating,which characterizes the AM *** this study,solution treatment was conducted under various temperatures(1,000,1,050,1,100,and 1,200℃)and durations(1,2,4,and 8 h)to minimize the negative effects of Cu segregation andε-Cu precipitates on precipitation *** mechanical prop-erties and microstructures of each condition for the Cu precipitation behavior were *** theε-Cu precipitates did not disappear after solution treatment,the average diameter of theε-Cu precipi-tates tended to decrease with increasing solution treatment temperature and ***,solution treatment at a temperature of 1,200℃ for 8 h was the best,resulting in improved strength compared to the conventional solution treatment at 1,050℃.Solution treatment on at least 1,100℃ is effective in AM.

关键词： Selective laser melting Cu segregation Solution treatment 17-4 Precipitation-hardened stainless steel Additive manufacturing

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3d Architecture to Integrate Backside Power Interconnect and Integrated Passive device for Thermal and Electrical Performance Management of Logic Chip

3D Architecture to Integrate Backside Power Interconnect and...

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2024 International VLSI Symposium on technology, Systems and Applications, VLSI TSA 2024

作者： Lu, C.-L. Lin, S.-C. Ho, C.-S. Lin, H.-C. Chiu, M.-H. Chuang, C.-H. Lu, M.-C. Lai, W.-Y. Basu, N. Liao, Miller Chang, S.-Z. R&D Powerchip Semiconductor Manufacturing Corporation Hsinchu Taiwan Graduate School of Advanced Technology Department of Mechanical Eng. National Taiwan University Taiwan

ISBN: (纸本)9798350360349

A novel 3d architecture with backside power delivery network (BSPdN) and embedded 3d high density Si capacitor is proposed with the superior electrical performance and heat dissipation. Typical backside power-via technology with carrier is found to have the thermal dissipation issue. The good concentration of the mimic BSPdN daisy chain (2K contact TSVs) describes the proposed structure is well- connected after carrier with 3d high density Si capacitor and TSV integration by wafer on wafer bonding. The 3d high density (>40% density within chip) Si capacitor which is targeting to implement into carrier has good capacitance (>1.0 μF/mm2) and small capacitance variation ( © 2024 IEEE.

关键词： Wafer bonding

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Effect of purine diet on prognosis of deep brain stimulation for Parkinson's disease

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Food Science and Human Wellness 2025年第3期14卷 1026-1033页

作者： Bowen Chang Yuge Jiang Chuanxing Feng Bowen Li Jiaming Mei Chaoshi Niu Department of Neurosurgery The First Affi liated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001China Key Laboratory of Xin’an Medicine Ministry of EducationAnhui Provincial Key Laboratory of R&D of Chinese MedicineAnhui University of Chinese MedicineHefei 230038China Center for Food Nutrition and Functional Food Engineering School of Food Science and TechnologyJiangnan UniversityWuxi 214122China

Uric acid(UA)is a naturally antioxidant that is strongly associated with the development and progression of Parkinson's disease(Pd).The purine diet is an important exogenous pathway that modulates blood UA *** brain stimulation(dBS)is an important tool for Pd *** study aimed to explore the effects of preoperative purine diet on the prognosis of patients with Pd after ***-four patients with Pd who underwent dBS were included in this study,and their clinical data,blood UA levels,and daily purine *** were followed up for improvement 1 year after *** found that patient higher purine intake was strongly associated with the rate of improvement after dBS and was a protective factor for patient *** purine intake from meat and seafood was significantly higher in the responsive patients than in the lessresponsive *** analysis showed that UA mediated 78%of the effect of purine intake on motor symptom improvement after *** summary,we observed that purine intake is strongly associated with the rate of improvement in motor symptoms after subthalamic nucleus-dBS in patients with *** study provides a reference for preoperative diet planning in patients with Pd undergoing dBS.

关键词： Purine diet Nutrition Parkinson’s disease deep brain stimulation Brain connectivity

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Optimization of the controlled cooling condition in batch-type furnace for the recycled Al-Mg-Si based alloy sheets 28

Optimization of the controlled cooling condition in batch-ty...

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28th Congress of the International Federation for Heat Treatment and Surface Engineering, IFHTSE 2023

作者： Kang, Heon Kim, Sang Gweon Yeo, Kuk Hyun Kim, dae Young Yoon, Young Ok Shin, Jae Hyuck Jung, Young Kil Kim, SE Hoon Kim, Jin Pyeong Heat & Surface Technology R&D Department Korea Institute of Industrial Technology 113-58 Seohaean-ro Gyeonggi-do Siheung-si Korea Republic of Industrial Materials Processing R&D Department Korea Institute of Industrial Technology 156 Gaetbeol-ro Yeonsu-gu Incheon Korea Republic of Advanced Materials R&D Department Korea Automotive Technology Institute 303 Pungse-ro Pungse-myeon Dongsam-Gu Chungnam Cheonan-si Korea Republic of

ISBN: (纸本)9781713889533

In this study, the shape, size and distribution of precipitates and/or clusters according to the alloy composition (Mg: 0.4 ~ 0.8 w.t. %, Si: 0.6 ~ 1.2 w.t. %) of Al-Mg-Si based alloy sheets were simulated by Monte Carlo method in the condition of batch-type heat treatment process. Based on the results, the precipitates and clusters in the suggested cooling with and without pre-aging conditions (Solid-solution condition: 400 ~ 500 ºC, cooling condition: ~150 ºC, pre-aging condition: 80 ~ 120 ºC) were predicted by Matcalc software (computer simulation of phase transformation and microstructure evolution in metallic systems). The optimized heat treatment conditions derived based on the analysis results were applied to the small-sized coils, and the microstructure and mechanical properties were evaluated respectively. Most cluster sizes were less than 5nm observed in HrTEM. The yield stress and elongation to failure were above 100 MPa and 25 %, respectively. In addition, the Al-Mg-Si based sheets containing the scraps of combinations of 3xxx, 5xxx and 6xxx series sheets were heat treated in the same condition, and microstructure and mechanical properties of the heat-treated recycled sheets were evaluated. © 2023 28th IFHTSE 2023 Congress. All rights reserved.

关键词： Solid solutions

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Synthetic Voltage and Capacity Profile regeneration Through Constant Voltage Sampling Process from Second Life Batteries Perspective 10

Synthetic Voltage and Capacity Profile Regeneration Through ...

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10th International Conference on Electrical Energy Systems, ICEES 2024

作者： Vignesh, S. Selvaraj, Jeyraj A-L Che, Hang Seng Soon, Tey Kok Universiti Malaya HiCoE UMPEDAC Level 4 WISMA R&D Institute for Advanced Studies Kuala Lumpur59990 Malaysia Universiti Malaya HiCoE UMPEDAC Level 4 WISMA R&D Kuala Lumpur59990 Malaysia Universiti Malaya Department of Computer System & Technology Kuala Lumpur50603 Malaysia

ISBN: (纸本)9798350353778

Predicting State of Health (SoH) of Second Life Batteries (SLB) is a challenging aspect when the repurposer is often surrounded by uncertainty in historical data from Electric Vehicle (EV). The EV Original Equipment Manufacturer (OEM) hardly reveal any battery related data to public domain, it also reciprocates to the repurposer. However, SoH estimation demands minimal historic data to compare past and present state of the batteries. Thus, when repurposer examines SoH of SLB, it is mandated to adhere on either of reference Performance Test (rPT) or the one which is recommended in the cell datasheet by the cell manufacturer to compare the SLB performance with the past data. While executing this process, the repurposer often conducts multiple charge and discharge cycles to comment on SoH of the SLB cells. Hence, in order to reduce the processing time in conducting cycling experiments, and to predict the SoH of SLB, the authors proposed a novel approach on regenerating voltage and capacity profile through Constant Voltage Sampling (CVS) process considering SLB perspective. The regenerated curve is deemed as synthetic curve wherein the forward and backward prediction of SoH is carried out. raw test data is accessed from University of Michigan repository for serving as reference to the authors. The results of voltage and capacity profile are validated successfully for SoH ranges from 100% to 80%. With the help of CVS technique, discharge voltage and capacity profiles for SoH ranges from 80% to 50% were reconstructed successfully to define the health indicators governing SoH and remaining useful Life (ruL). © 2024 IEEE.

关键词： State of charge

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Thermal control of thin films with nano structure 9

Thermal control of thin films with nano structure

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9th European Thermal Sciences Conference, EUrOTHErM 2024

作者： Sato, M. Takahara, Y. Matsumoto, M. Kajinami, N. Hanaoka, M. Iwakawa, M. Department of Mechanical Engineering and Science Graduate School of Engineering Kyoto University Kyoto615-8540 Japan Advanced Technology R&D Center Mitsubishi Electric Corporation Hyogo661-8661 Japan

Thermoelectric energy conversions have been attracting much attention, which directly generate electric energy from thermal one by utilizing the Seebeck effect. Among various efforts to improve the conversion efficiency, control of phonon propagation with nano-scale structures has been popular, which utilize phonon scatterings on structural interfaces. The concept is based on the difference of mean free path (MFP) between phonons and electrons (charge carriers). In typical cases with silicon-base devices, MFP of phonons is in an order of 100 nm while that of electrons is 1-10 nm. Thus structures of 10-100 nm size are expected to be effective for suppressing the phonon heat transfer without much reducing the electric transport, leading to conversion efficiency improvement. We have developed a numerical scheme to investigate phonon transport based on the Boltzmann transport equation (BTE) for time development of the phonon distribution function. To treat various shapes of nano-scale structures, we have newly introduced a VOF (volume of fluid) like scheme. In the presentation, we will show results of several test systems of nano-structured Si thin films, with evaluation of effective electric conductivity, to discuss how much nano-scale structures improve the conversion efficiency. © Published under licence by IOP Publishing Ltd.

关键词： Conversion efficiency

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65-3: Viewing Angle Control through Electrically-Induced Effective Out-of-Plane retardation differences in Automotive displays

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SId Symposium digest of Technical Papers 2024年第1期55卷 893-896页

作者： Tae-Hoon Choi Hyun Wook Lee Jin Uk Ha Department of Advanced Materials R&D Korea Automotive Technology Institute Cheonan Republic of Korea 31214

We report a method for controlling the viewing angle using twisted nematic liquid crystal (TN-LC) materials for automotive display applications. We achieved switching between normal and privacy modes with the change in viewing-angle-dependent retardation through the reorientation of the TN-LC molecules under crossed polarizers by applying a vertical electric field.

关键词： Automotive displays viewing angle control liquid crystals polarization optics light control film

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Promotional effect of cobalt doping on catalytic performance of cryptomelane-type manganese oxide in toluene oxidation

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Journal of Environmental Sciences 2023年第4期126卷 263-274页

作者： Ning dong Mengyue Chen Qing Ye dan Zhang Hongxing dai Key Laboratory of Beijing on Regional Air Pollution Control Department of Environmental ScienceSchool of Environmental and Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China R&D Department of Atmospheric Prevention and Control Technology Guangdong Suncere Technology Co.Ltd.Guangzhou 510220China Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of Chinaand Laboratory of Catalysis Chemistry and NanoscienceDepartment of Environmental Chemical EngineeringSchool of Environmental and Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

The cryptomelane-type manganese oxide (OMS-2)-supported Co (x Co/OMS-2;x=5,10,and15 wt.%) catalysts were prepared via a pre-incorporation *** as-prepared materials were used as catalysts for catalytic oxidation of toluene (2000 ppmV).Physical and chemical properties of the catalysts were measured using the X-ray diffraction (Xrd),Fourier transform infrared spectroscopic (FT-Ir),scanning electron microscopic (SEM),X-ray photoelectron spectroscopy (XPS),and hydrogen temperature-programmed reduction (H_(2)-TPr)*** all of the catalysts,10Co/OMS-2 performed the best,with the T90%,specific reaction rate at 245℃,and turnover frequency at 245℃ (TOFCo) being 245℃,1.23×10^(-3)moltoluene/(gcat·sec),and 11.58×10^(-3)sec-1for toluene oxidation at a space velocity of 60,000mL/(g·hr),*** excellent catalytic performance of 10Co/OMS-2 were due to more oxygen vacancies,enhanced redox ability and oxygen mobility,and strong synergistic effect between Co species and OMS-2 ***,in the presence of poisoning gases CO_(2),SO_(2)or NH_(3),the activity of 10Co/OMS-2 decreased for the carbonate,sulfate and ammonia species covered the active sites and oxygen vacancies,*** the activation treatment,the catalytic activity was partly *** good low-temperature reducibility of 10Co/OMS-2 could also facilitate the redox process accompanied by the consecutive electron transfer between the adsorbed O_(2)and the cobalt or manganese *** the oxidation process of toluene,the benzoic and aldehydic intermediates werefirst generated,which were further oxidized to the benzoate intermediate that were eventually converted into H_(2)O and CO_(2).

关键词： Cryptomelane-type manganese oxide Cobalt doping Volatile organic compound Toluene oxidation

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Estimation of AC Breakdown Strength of Epoxy/TiO2Nanocomposite using Electron Avalanche Breakdown Model

Estimation of AC Breakdown Strength of Epoxy/TiO2Nanocomposi...

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2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022

作者： Tagawa, Kazuma Kurimoto, Muneaki Sawada, Toru Yoshida, Shigeyoshi Umemoto, Takahiro Mabuchi, Takahiro Muto, Hirotaka Nagoya University Department of Engineering Japan Advanced Technology R&d Center Mitsubishi Electric Corporation Japan

ISBN: (数字)9781665407502

ISBN: (纸本)9781665407502

Large agglomerates are dielectric defects in nanocomposites, which are polymer matrix added nanoparticles. However, a method for quantifying the critical agglomerate size to improve the dielectric breakdown strength of nanocomposites has not yet been established. In this study, the dependence of the AC breakdown strength on the agglomerate size of epoxy/TiO2 NC is estimated using an electron avalanche breakdown model. © 2022 IEEE.

关键词： Nanocomposites

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High-Speed Wafer Temperature Control Approach of Step Chiller for Semiconductor Manufacturing Equipment 49

High-Speed Wafer Temperature Control Approach of Step Chille...

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49th Annual Conference of the IEEE Industrial Electronics Society, IECON 2023

作者： Yun, Hyeonjun Kwon, Hyeseon Yeh, Sangsu Lee, Minsu Kim, Jonghwa Kim, Yunha Cha, Seungwoo Kang, Mingu Nam, Jooyeop Samsung Electronics Mechatronics R&d Center Hwaseong-si Korea Republic of Korea Advanced Institute of Science and Technology Department of Mechanical Engineering Daejeon Korea Republic of

ISBN: (纸本)9798350331820

As the complexity of semiconductor manufacturing processes increases, various temperature control conditions are required to ensure the etching of various materials is optimized. Fast and precise temperature control is a key factor in the semiconductor production throughput and yield, making the development of a step chiller essential. This chiller mixes hot and cold coolants from two sources, enabling faster cooling/heating than can be achieved from a single source. In this paper, we propose a system identification and control strategy that can maximize the performance of step chillers for semiconductor production equipment, focusing on both speed and accuracy aspects. An approach of model reduction is utilized to transform the highly nonlinear time-varying delay system of the chiller into a linear time-invariant delay system. We then outline a model-based feedforward/feedback controller based on delay system control theory, and conclude with an experimental result demonstrating the effectiveness of the proposed control algorithm. © 2023 IEEE.

关键词： Mixing

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