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Influence of the design of Ti (C, N)-based cermets with alternative binders on their performance and wear in milling

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Wear 2025年

作者： Premkumar, Vikas B.K. Chalkiadakis, Evangelos M'Saoubi, rachid Bushlya, Volodymyr Production and Materials Engineering Lund University Ole Römers Väg 1F Box 118 Lund221 00 Sweden R&D Materials and Technology Development Seco Tools AB FagerstaSE-73782 Sweden

Ti (C, N) based cermet materials are predominantly used in continuous finishing applications of metal cutting due to their high hardness, excellent resistance to oxidation and high chemical stability. However, their application in interrupted cutting like milling are limited due to their brittle-like failure due to low fracture toughness. In this work, alternative binder systems such as Co-Ni and Ni are investigated to study their influence on the material properties followed by evaluating their performance in face milling of quench and tempered 42CrMo4 steels having a hardness of 35 HrC. The results show that as the concentration of Ni in the binder increases, the hardness (HV) decreases and the Palmqvist fracture toughness (K1C) increases. This trend is more pronounced in the binder containing pure Ni. Thus, Ni helps in transforming the nature of a brittle-like cermet with Co binder to a tougher cermet with Co-Ni and pure Ni binder. Up-milling tests with coolant revealed that as-sintered cermet with pure Co and Co-Ni binder performed similarly while pure Ni binder showed premature failure. CVd coated cermet in as-deposited state shows a substantial improvement in performance of the Co-Ni binder compared to pure Co binder while Ni binder show rapid flaking of coating causing premature failure. Formation of comb cracks and parallel cracks networks followed by adhesion and impaction of steel in the cracks is observed as the main wear mechanism that causes rapid block isolation of the geometry leading to tool catastrophic failure. However, CVd coated Co-Ni binder system showed less adhesion in the crack networks which is speculated to be the reason for its improved performance. © 2025 The Authors

关键词： Cracks

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The Opportunity of Anti-ferroelectrics in FeFET for Emerging Non-Volatile Memory Applications

The Opportunity of Anti-ferroelectrics in FeFET for Emerging...

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Annual International Symposium on reliability Physics

作者： Hyojun Choi Giuk Kim Hunbeom Shin Yunseok Nam Sanghun Jeon Kwangsoo Kim Suhwan Lim Jongho Woo Wanki Kim daewon Ha Jinho Ahn Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Korea Semiconductor R&D Center Samsung Electronics Co. Ltd Suwon Korea Material Science and Engineering Hanyang University Seoul Korea

ISBN: (数字)9798331504779

ISBN: (纸本)9798331504786

We demonstrate a novel Ferroelectric FET (FeFET) configuration designed to expand memory window (MW) and enhance retention via two approaches: (i) the introduction of a charge trap layer (CTL) and (ii). the adoption of anti-ferroelectric (AFE) material. The retention loss in metal-interlayer (IL)-ferroelectric (FE)-IL-silicon (MIFIS) FeFET is ascribed to the negative feedback loop, involving the de-trap of interface trap charge from gate (Qit‘) and the loss of polarization (P) which mutually accelerates the further loss of the other. Our first approach, CTL on top of FE, provides additional trap sites with deep trap levels which introduces favorable charge (QN) with high stability, thus enhancing both MW and retention. Moreover, by utilizing the high spontaneous polarization (Ps) and low remanent polarization (Pr) nature of AFE, we further improved the retention characteristics by increasing the proportion of QN and decoupling the negative feedback loop. By proposing a new FeFET design with a high MW (~12.9 V), a low operation voltage (+17/-14 V), and enhanced data retention, we suggest that the hafnia-based FeFET can be a big step forward for 3d NANd technology.

关键词： Three-dimensional displays Nonvolatile memory Voltage Logic gates Iron Negative feedback loops reliability FeFETs Thermal stability Physics

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domain Wall Structure Model through the Thickness of Fe–Si Sheet Studied by X ray Topography

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ISIJ International 2025年第2期65卷 326-330页

作者： Kataoka, Takashi Kawamura, Yusuke Futagi, Toshiro Ushigami, Yoshiyuki Ibaraki College 866 Nakane Hitachinaka-City Ibaraki312-8508 Japan Steel Research Laboratories Technical Research & Development Bureau NIPPON STEEL CORPORATION 20-1 Shintomi Futtsu-City Chiba293-0011 Japan Physical Characterization Solutions Div. R&D Supporting Unit NIPPON STEEL TECHNOLOGY Co. Ltd. 20-1 Shintomi Futtsu-City Chiba293-0011 Japan NIPPON STEEL TECHNOLOGY Co. Ltd. 2-1 Tobihata-cho Tobata-ku Kitakyushu-City Fukuoka804-0001 Japan

Fe–Si sheet, which has {110} crystal orientation (Goss-FeSi), consists of Basic domain and Lancet-comb domain. Although the geometric structures of the Lancet-comb domain have been predicted by theoretical aspects, they have not been proved by experimental studies. In this paper, we study the Lancet-comb domain structures of a Fe–Si steel by a volume sensitive method, i.e., transparent X-ray topography (XrT). From the XrT results, we found the parallelogram structures, which is bulk structure of the Lancet-comb domain. The long side of the parallelogram forms about 55° angle to the rolling direction and the short side forms about 35° angle to the rolling direction. We assigned the long side of the parallelogram to {110} domain wall and the short side to {111} domain wall based on the geometric analysis. This Lancet-comb domain model well explains the behavior of the magnetic moments of Goss-FeSi. © 2025 The Iron and Steel Institute of Japan.

关键词： Silicon steel

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Accelerating deep Neural Networks with a Low-Cost Lossless Compression

Accelerating Deep Neural Networks with a Low-Cost Lossless C...

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International Conference on Electronics, Information and Communications (ICEIC)

作者： Seongwook Kim Gwangeun Byeon Seungeui Lee Youngseok Bae Seokin Hong Department of Electrical and Computer Engineering Sungkyunkwan University Suwon Korea Advanced R&D Center Hanwha Systems Co. Ltd. Emerging Science and Technology Directorate Agency for Defense Development

ISBN: (数字)9798331510756

ISBN: (纸本)9798331510763

Since deep learning inference involves a significant amount of computations, there have been a lot of efforts to accelerate the inference process by eliminating ineffectual compu-tations. As a solution to this problem, several sparsity-aware deep learning accelerators have been proposed. These accelerators perform the inference on compressed data (filters and feature maps) and dynamically remove the ineffectual multiplications with zero operands. For efficiently handling the compressed data on the accelerators, a simple and effective compression scheme, which encodes the whole data with its nonzero values and their positions, is necessary. However, prior approaches have several shortcomings, such as low compression efficiency and high complexity in compression and decompression hardware. This paper proposes a low-cost compression scheme that can be applied to sparsity-aware deep-learning accelerators. The compression scheme synergistically combines two low-cost compression schemes: Zero-Value Compression (ZVC) and Base-delta-Immediate Compression (BdI). Our experimental evaluation shows that the proposed compression scheme achieves an average compression ratio of 2.26, resulting in 2.33x performance improvement,

关键词： deep learning Filters Artificial neural networks Performance gain Complexity theory Hardware acceleration

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Experimental Analysis of Compression deformation at High-Temperatures and Numerical Simulation for BaTiO3 Sintered Compacts

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Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 2025年 72卷 S277-S280页

作者： Tanaka, Hiroyuki Matsubara, Hideaki Yokota, Hideaki Iguchi, Toshihiro Takagi, Yuko Nomura, Hiroshi Terasaka, Sota Igimi, daisuke Technology HQ TDK Corporation 2-15-7 Higashi-Ohwada Ichikawa272-8588 Japan Graduate School of Environmental Studies Tohoku University 6-6-20 Aramaki Aza Aoba-ku Sendai980-8579 Japan Prior Art Development Dept Ceramics condenser BG TDK Corporation 570-2 Matsugashita Minamihatori Narita282-8558 Japan Materials R&D Lab Japan Fine Ceramics Center 2-4-1 Mutsuno Atsuta-ku Nagoya456-8587 Japan

Uni-axial compression tests were performed to derive yield stress equation, flow rules and coefficient of flow stress of BaTiO3 sintered compaction. These basic equations and their physical properties were introduced into the FEM. The drooping behavior of the thin-thickness specimen during the sintering was simulated and compared to the experimental drooping, where the specimens were composed of large or small average diameter BaTiO3, respectively. resulting simulation drooping quantitatively reproduces that experiment. This result suggests that experimentally derived yield stress equation, non-Newtonian viscoplastic flow rule σeq = FΕ0Ε0.8 and coefficient of flow stress about several to 1000 GPa s of sintered BaTiO3 compaction were numerically validated. ©2025 Japan Society of Powder and Powder Metallurgy.

关键词： Yield stress

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Carbon compounds, internal stress and hydrogen permeability in carbon-doped TiZrN coatings by laser ablation

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Ceramics International 2025年

作者： Kim, Seonghoon Hong, Eunpyo Choi, Young-kyu Lee, Seahoon Lee, Youngjae Choi, Yongsup Lee, Heesoo Extreme Materials Research Institute Korea Institute of Materials Science Changwon51508 Korea Republic of Mechanical & Material Technology Center Korea Testing Laboratory Jinju52852 Korea Republic of Research Institute of Sustainable Development Technology Low-Carbon Emission Control R&D Department Korea Institute of Industrial Technology Cheonan31056 Korea Republic of Institute of Plasma Technology Korea Institute of Fusion Energy Gunsan54004 Korea Republic of School of Materials Science and Engineering Pusan National University Busan46241 Korea Republic of

Internal stress has emerged as a crucial factor in determining the lifetime of hydrogen permeation barrier coatings, as it influences the hydrogen isotope diffusion and crack propagation. Here, we fabricated carbon-doped TiZrN coatings under different laser outputs, and investigated the changes in hydrogen permeability due to carbon compound formation and internal stress induced by laser shock peening. Based on ToF-SIMS, the carbon penetration depth in the coating was confirmed to be up to 500 nm, depending on the laser output. Using XPS and raman analysis, it was confirmed that doped carbon substituted nitrogen sites in TiZrN, forming TiC and ZrC, and increasing carbide content from 4.1 % to 7.4 %. Notably, as the laser output increased from 30 % to 40 %, the sp2/sp3 ratio rose from 1.33 to 2.67, and the Id/IG ratio increased from 0.81 to 1.33, indicating the formation of an amorphous carbon-embedded (Ti, Zr)(C, N) structure. This was complemented by the transformation of the TEM-SAEd pattern from dot patterns to ring patterns. The internal stress in carbon-doped TiZrN coatings increased from 4.323 GPa before carburization to a maximum of 5.620 GPa. The increase in residual compressive stress led to a reduction in hydrogen permeability by up to 69 %, 57 %, and 24 % at 573 K, 673 K, and 773 K, respectively. This study advances the understanding of carbon compound formation and internal stress changes in TiZrN coatings under different laser output. It demonstrates that the formation of residual compressive stress due to laser shock peening significantly influences the hydrogen permeability by inhibiting hydrogen isotope diffusion and crack propagation within the coating. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Laser ablation

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Hydrate reformation Characteristics in Offshore Natural Gas Hydrate reservoir Using the Horizontal Well depressurization Production

Hydrate Reformation Characteristics in Offshore Natural Gas ...

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Offshore technology Conference, OTC 2025

作者： Zhang, Jianbo Liu, Xiaoao Luo, Jiazheng Sun, Xiaohui Zhong, Jie Wang, Zhiyuan Huang, Weian Sun, Baojiang Wang, Xiao School of Petroleum Engineering China University of Petroleum East China Shandong Qingdao China Shandong Key Laboratory of Offshore Oil & Gas and Hydrates Development Shandong Qingdao China CNPC Engineering Technology R&D Company Limited Beijing China No.7 Oil Production Plant PetroChina Changqing Oilfield Company Shanxi Xian China College of Computer Science and Technology China University of Petroleum East China Qingdao China School of Materials Science and Engineering China University of Petroleum East China Qingdao China

ISBN: (纸本)9781959025610

during depressurization production of natural gas hydrate, the reformation of hydrate is likely to occur in the reservoir, hindering the efficient development of hydrate. Previous studies on the reformation of hydrate in the process of natural gas hydrate production were mainly focused on experimental research and numerical simulation under experimental conditions. In this work, a multi-field coupling flow model considering the effect of hydrate reformation during depressurization production of hydrate reservoir was established, and the accuracy of the model was verified by the field measured data. Meanwhile, the reformation characteristics of hydrate in the reservoir using the horizontal well depressurization production were simulated and investigated. The results show that the reformation of hydrate in the reservoir mainly occurs in the upper part and middle boundary of the hydrate decomposition zone during the depressurization production. Moreover, the smaller the pressure drop extent, absolute permeability and initial hydrate saturation, and the deeper the horizontal well, the larger the hydrate secondary formation zone in the reservoir, the faster the rate of hydrate reformation, and the greater the hydrate saturation caused by hydrate reformation would be, which would make the risk of flow blockage by reformed hydrate in the reservoir rise. The results of this study can provide theoretical support for the safe and efficient development of offshore natural gas hydrate. © 2025, Offshore technology Conference.

关键词： Offshore gas well production

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Investigation on cutting fluid use in finish milling of polylactide (PLA) 3d-printed parts 20

Investigation on cutting fluid use in finish milling of poly...

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20th CIrP Conference on Modeling of Machining Operations in Mons, CIrP CMMO 2025

作者： Lorenzoni, Margaux Spitaels, Laurent rivière-Lorphèvre, Edouard Odent, Jérémy M'Saoubi, rachid Cloëz, Liam Fontaine, Michaël ducobu, François Machine Design and Production Engineering Lab Research Institute for Materials Science and Engineering University of Mons Place du Parc 20 Mons7000 Belgium University of Mons Place du Parc 20 Mons7000 Belgium R&D Material and Technology Development Seco Tools AB Björnbacksvägen 2 FagerstaSE-737 82 Sweden Department of Mechanical Engineering Sciences Division of Production and Materials Engineering Lund University Ole Römers väg 1 LundSE-221 00 Sweden FEMTO-ST Institute-Applied Mechanics Dept. Université de Franche-Comté-SUPMICROTECH-CNRS Rue de l'épitaphe 24 BesançonF-25000 France

Fused Filament Fabrication (FFF) is an additive manufacturing process based on material Extrusion (MEX) of polymeric filament. This manufacturing technology is commonly used for personalized production applications and prototyping, allowing to obtain customized parts with complex geometries at a low cost. However, this production technique has its limitations regarding dimensional accuracy and surface roughness of the final parts. To overcome these limitations, finish milling is considered to be a promising technique as it is widely used for metallic parts. Yet, the specific thermal properties of polymers such as low thermal conductivity and low melting temperature are adding a challenge in the determination of optimal cutting conditions. In this context, the use of cutting fluid could be the key to keep the material from melting during milling. Therefore, this paper proposes to compare the impact of using a compressed air flow to dry conditions on the cutting forces and the surface quality obtained on 3d-printed polylactide (PLA) parts. The qualification test of the tool-material couple standard (NF E 66-520-6) will be used as a guideline to determine the relevance of cutting fluid use for cutting conditions varying around an operating point. Moreover, simulated cutting forces using a mechanistic model will be compared to experimental data to evaluate the applicability of the model. © 2025 The Authors.

关键词： Compressed air

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A proposal on dynamic bandwidth allocation for one-dimensionally moving mobile entities

A proposal on dynamic bandwidth allocation for one-dimension...

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International Conference on Information Networking

作者： Yuta Tachikawa Yuki Hatanaka ryo Murakami Tetsuya Yokotani Hiroshi Minemo Seiji Kozaki Takeshi Suehiro Kenichi Nakura Shigenori Tani Department of Electrical and Electronic Engineering (Graduate School of Engineering) Kanazawa Institute of Technology Ishikawa Japan (department of technology) Department of Electrical and Electronic Engineering Kanazawa Institute of Technology Ishikawa Japan (Graduate School of Science and Technology) Shizuoka University Shizuoka Japan Mitsubishi Electric Corporation (Development Division) Information Technology R&D Center Kanagawa Japan

ISBN: (数字)9798331506940

ISBN: (纸本)9798331506957

recent years, with the introduction of 5th generation mobile communication networks, bursty traffic and upstream traffic characteristics have changed significantly. The deployment of small cells and passive optical networks for highspeed broadband services are considered. Passive optical network technology can apply to multiplex many small cells. The authors have proposed BCOM as a bandwidth control scheme for uplink traffic and have carried out bandwidth allocation, assuming the case where mobile vehicles pass according to schedule. In this paper, BCOMs evaluate assuming that mobile vehicles do not arrive on schedule.

关键词： Multiplexing Schedules Bandwidth Channel allocation Passive optical networks Broadband communication resource management Proposals Vehicle dynamics Uplink

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Coherent EUV scatterometry of 2d periodic structure profiles with mathematically optimal experimental design

arXiv

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arXiv 2025年

作者： Klein, Clay Jenkins, Nicholas W. Shao, Yunzhe Li, Yunhao Park, Seungbeom Kim, Wookrae Kapteyn, Henry C. Murnane, Margaret M. Department of Physics JILA & STROBE NSF Science & Technology Center University of Colorado & NIST BoulderCO United States Core Technology R&D Team Mechatronics Research Samsung Electronics Co. Ltd. Hwasung Korea Republic of Advanced Process Development Team 4 Semiconductor R&D Center Samsung Electronics Co. Ltd. Hwasung Korea Republic of KMLabs Inc. 4775 Walnut Street #102 BoulderCO80301 United States

Extreme ultraviolet (EUV) scatterometry is an increasingly important metrology that can measure critical parameters of periodic nanostructured materials in a fast, accurate, and repeatable manner and with high sensitivity to nanoscale structure and material composition. Because of this, EUV scatterometry could support manufacturing of semiconductor devices or polymer metamaterials, addressing the limitations of traditional imaging methods such as resolution and field of view, sample damage, throughput, or low sensitivity. Here we use EUV scatterometry to measure the profile of an industrially relevant 2d periodic interconnect structure, using λ = 29 nm light from a table-top high harmonic generation source. We show that EUV scatterometry is sensitive to out-of-plane features with single-nanometer sensitivity. Furthermore, we also apply a methodology based on the Fisher information matrix to optimize experimental design parameters, such as incidence angles and wavelength, to show how measurement sensitivity can be maximized. This methodology reveals the strong dependence of measurement sensitivity on both incidence angle and wavelength — even in a simple two-parameter case. Through a simultaneous optimization of incidence angles and wavelength, we determine that the most sensitive measurement of the quantities of interest can be made at a wavelength of ∼14 nm. In the future, by reducing sample contamination due to sample preparation, deep sub-nanometer sensitivity to axial profiles and 2d structures will be possible. Our results are an important step in guiding EUV scatterometry towards increased accuracy and throughput with a priori computations and by leveraging new experimental capabilities. © 2025, CC BY.

关键词： Fisher information matrix

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