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Chinese Materials Conference 2024, CMC 2024

作者： Ni, Ruifeng Zhang, Pengjie Che, Lida Lv, Zhoujin Chen, Shuo Zhang, Lin Li, Xiangyang Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China CISRI HIPEX Technology Co. Ltd. Beijing China National Key Laboratory of Metallurgical Intelligent Manufacturing System China Iron & Steel Research Institute Group Co. Ltd. Beijing100081 China

TA15 alloy billets were prepared by powder metallurgy-hot isostatic pressing, using 920°C, 120MPa, and a 3h holding time. Pre-alloyed powders were prepared using a plasma rotating electrode process, gas atomization, and hydrogen dehydrogenation. The particle morphology, chemical composition, particle size distribution, and microstructure of the different powders were first characterized. Then, the differences in microstructure and mechanical properties of the three alloy billets were analyzed. The results show HIP-P (tensile strength 956 MPa, elongation 16.5%) and HIP-G (tensile strength 912 MPa, elongation 16.83%) have an excellent strength-toughness combination. Although HIP-H has the highest tensile strength of 1066MPa, the elongation is only 1.3%, presenting the characteristics of high strength and low toughness. Its fracture morphology is a river pattern, a typical brittle fracture along the crystal. The 'elemental segregation' within the HDH powder causes the brittle fracture. This segregation leads to stress concentration during deformation, facilitating the initial propagation of cracks from the segregated regions. The high oxygen content (2200 ppm) in the HDH powder also contributes to the embrittlement observed in HIP-H. This study provides crucial insights for selecting raw powder materials and optimizing process parameters in producing HIP TA15 titanium alloy. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Tensile strength

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The influence of position errors on stray light in compensation interferometry

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Astronomical Techniques and Instruments 2025年第2期2卷 111-118页

作者： Yutong Sun Qiang Cheng Longxiang Li Xin Zhang Donglin Xue Xuejun Zhang Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Applied Optics Changchun 130033China Key Laboratory of Optical System Advanced Manufacturing Technology Changchun 130033China

Null compensation interferometry is the primary testing method for the manufacture of ultra-high-precision aspheric *** crosstalk fringes generated by stray light in interferometry can affect accuracy and potentially prevent the testing from proceeding *** errors include the decenter error,tilt error,and distance *** the testing process,position errors will impact the testing accuracy and the crosstalk fringes generated by stray *** determine the specific impact of position errors,we use the concept of Hindle shell testing of a convex aspheric mirror,and propose the simulation method of crosstalk fringes in null compensation *** also propose evaluation indices of crosstalk fringes in interferometry and simulate the influence of position errors on the crosstalk *** work aims to help improve the design of compensation interferometry schemes,enhance the feasibility of the design,reduce engineering risks,and improve efficiency.

关键词： Compensation interferometry Stray light Multi-beam interference Position error

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Multifunctional cascade theranostic agents for synergistic photothermal/ferroptosis/immuno antitumor therapy

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Colloids and Surfaces B: Biointerfaces 2025年 253卷 114740页

作者： Chen, Haoran Long, Fei Gan, Dechao Wang, Wang Li, Xiaodan Wu, Yihui Kong, Xianggui Chang, Yulei State Key Laboratory of Luminescence Science and Technology Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun130033 China Department of Respiratory Medicine the First Hospital of Jilin University Changchun130021 China Key Laboratory of Optical System Advanced Manufacturing Technology Chinese Academy of Sciences Changchun130033 China

Photothermal therapy (PTT) has achieved tremendous advances against various cancers. However, it encounters uneven heat distribution caused by the limited penetration of the excitation light. Besides, the intrinsic heat resistance mechanisms in the tumor microenvironment limit antitumor efficacy and impose the potential risks of metastasis. To solve the suboptimal therapeutic effect of PTT, we have engineered photothermal agents with high photothermal conversion efficiency (PCE) in NIR-II, combined with ferroptosis therapy, to achieve an efficient tumor inhibition effect. Specifically, we develop porous Bi2Te3 with high and stable PCE (68.35 %) at NIR-II (1060 nm) for PTT. The decoration of Fe3O4 nanoparticles on the porous Bi2Te3 increased PCE to 79.25 %, which induced ferroptosis. As a result, the intracellular Fe3 +-mediated Fenton reaction process is accelerated by PTT-induced local hyperthermia, and ferroptosis increases the thermal sensitivity of the tumor cells, resulting in an excellent therapeutic effect. In addition, the tumor-associated antigen released after the synergy of PTT/ferroptosis can also cause immunogenic cell death (ICD) due to the exposure of CRT and HMGB1, which are the "eat me" signals. Notably, Bi2Te3 and its synthesis template lanthanide-doped nanoparticles (LnNPs) are excellent candidates for X-ray, photoacoustic, and optical imaging (Er3+-activated 1525 nm downshifting luminescence ). They enable real-time imaging in deep tissue penetration with a high temporal and spatial resolution to guide precise antitumor treatment in situ. Furthermore, the resultant LnNP@Bi2Te3-Fe3O4 nanocomposites (LBT-Fe) can achieve X-ray/photoacoustic/NIR-II imaging-guided synergistic ferroptosis/PTT/immuno tumor therapy. © 2025 Elsevier B.V.

关键词： Hematite

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Enhancing IC substrate manufacturing through differential geometry and lightweight networks for etching defect detection

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Journal of manufacturing systems 2025年 80卷 902-915页

作者： Yu, Yongxing Huang, Dan Hu, Yueming School of Automation Science and Engineering South China University of Technology Guangzhou510641 China Engineering Research Center of Precision Electronic Manufacturing Equipment Ministry of Education and Guangdong Provincial Engineering Laboratory for Advanced Chip Intelligent Packaging Equipment South China University of Technology Guangzhou510641 China Department of Automation North China Electric Power University Baoding071003 China Baoding key Laboratory of State Detection and Optimization Regulation for Integrated Energy System North China Electric Power University Baoding071003 China

With the advancement of high-density interconnect technology in semiconductor manufacturing, the precision and complexity of integrated circuit (IC) substrates have significantly increased, placing higher demands on quality control. Efficient and accurate detection of complex etching defects, which often occur during manufacturing, has become critical to preventing potential product defects. A defect detection method is proposed that combines a lightweight network with differential geometry tools to address the issue of etching defects in IC substrates. First, an improved deformable model is used to rapidly extract regular circuit trace contours from complex metallographic images, and morphological processing is applied to enhance the details, achieving precise image segmentation. For under-etching defects between circuit traces, differential processing of the original and segmented images is performed to locate abnormal regions. Subsequently, an optimized lightweight network based on MobileNet, termed OMNet, is designed to achieve the rapid identification of under-etching defects in these regions. For etching defects occurring on circuit traces, the DGEtch method employs a high-precision discrete curvature calculation based on the Frenet frame to evaluate angular discontinuities in contours, enabling accurate detection of etching defects. Experimental results demonstrate that the proposed method achieves an average recall rate of over 95% and maintains a precision above 90%. It exhibits high accuracy and stability in detecting etching defects and consistently outperforms existing models, particularly in handling complex mixed defects. This study provides an effective solution for detecting complicated defects in high-density IC substrate manufacturing. © 2025 The Society of manufacturing Engineers

关键词： Inspection

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Multi-view fully connected graph to fuse multi-sensor signals for mechanical equipment remaining useful life prediction

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Journal of manufacturing systems 2025年 80卷 1029-1052页

作者： Jinxin Wu Deqiang He Zhenzhen Jin Ming Zhao Xianwang Li Yanjun Chen Guangxi Key Laboratory of Manufacturing System & Advanced Manufacturing Technology School of Mechanical Engineering Guangxi University Nanning 530004 China State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive Zhuzhou 412001 China Guangxi Key Laboratory of Precision Navigation Technology and Application Guilin University of Electronic Technology 541004 China Guangxi Liugong Machinery Co. Ltd Liuzhou 545007 China

Accurate remaining useful life prediction is essential for enhancing equipment reliability and optimizing maintenance strategies. However, existing methods struggle to effectively integrate multi-sensor data while quantifying uncertainty. To address these challenges, a multi-view fully connected graph neural network is proposed for multi-sensor mechanical equipment remaining useful life prediction. Firstly, local fully connected graphs and global graphs are constructed to comprehensively characterize the multi-view spatial correlations from global and local views. Meanwhile, the graph convolution operations are performed on local and global graphs to extract the intricate spatial dependencies within multi-sensor signals. Then, the learned multi-view spatial representations are fed into the temporal convolutional network to capture the temporal dependencies across sensor timestamps. Finally, a joint optimization network is developed to simultaneously predict the remaining useful life and its associated prediction interval, enabling uncertainty quantification. Extensive experiments on two multi-sensor monitoring degradation datasets demonstrate the superior performance of the proposed model, offering valuable technical support for predictive maintenance.

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Degradation state prediction of IGBT based on optimized variational mode decomposition and hybrid models

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Electrical Engineering 2025年 1-21页

作者： He, Deqiang Wang, Yanbo Wu, Jinxin Jin, Zhenzhen Zhao, Ming Chen, Yanjun State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures Guangxi Key Laboratory of Manufacturing System & Advanced Manufacturing Technology School of Mechanical Engineering Guangxi University Nanning China State Key Laboratory of Heavy-Duty and Express High-Power Electric Locomotive Zhuzhou China Guangxi Key Laboratory of Precision Navigation Technology and Application Guilin University of Electronic Technology Guilin China Guangxi Liugong Machinery Co. Ltd Liuzhou China

The insulated gate bipolar transistor (IGBT) is critical in motor drivers. Prolonged operation can lead to gradual degradation, adversely affecting motor operation and system performance. Therefore, accurate IGBT degradation state prediction (DSP) is essential for the timely maintenance and stable operation of motor drivers. The existing methods make it difficult to effectively deal with complex original degradation data, resulting in low DSP accuracy. To solve this issue, an improved method called ISSA-VMD-FDE based on optimized variational mode decomposition (VMD) and hybrid models is presented. Initially, the improved sparrow search algorithm (ISSA) is employed to optimize the VMD with minimum envelope entropy to obtain the key parameter combinations affecting VMD performance. Subsequently, the optimized VMD decomposes the IGBT degradation state data into multiple intrinsic mode functions (IMFs) and calculates each IMF’s fluctuation-based dispersion entropy (FDE). Based on the magnitude of FDE, the IMFs are categorized into high-frequency and low-frequency components. Finally, different models are applied to predict the high-frequency and low-frequency components separately, and the predictions are combined to yield the final DSP results. Experimental results demonstrate that the proposed prediction method exhibits strong predictive performance and reduces the MAPE by 89.41% compared to conventional methods, effectively supporting predictive maintenance and ensuring the reliable operation of IGBT.

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Mechanics reveal of hardness-dependent contact force during magnetorheological finishing based on granular flow-Hertzian hybrid model

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Optics Express 2025年第10期33卷 21914-21928页

作者： Yang Bai Congbo Zhang Fukun Li Haixiang Hu Xuejun Zhang Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences 130033 Changchun China University of Chinese Academy of Sciences 100049 Beijing China State Key Laboratory of Advanced Manufacturing for Optical System Changchun Jilin 130033 China

Magnetorheological finishing (MRF) has been widely used in the ultra-precision fabrication of optical components with different materials and shapes. As a flexible polishing method, MRF can be applied to the fabrication of ultra-thin brittle mirrors. However, the differences in contact force variations for materials with different hardness have been mainly studied by experimental investigation. There is no quantitative analysis and mechanism research related to the contact force of MRF, which is very important for the application of MRF in the optical manufacture. In this study, the material removal mechanism in MRF is investigated based on the granular flow theory and Hertzian contact theory. The modified quantitative shear force theoretical equation is established through the Preston equation. The relationship between material hardness, penetration depth, carbonyl iron powders (CIPs) concentration, CIPs size, and polishing contact force is analyzed. It is found that when the material hardness is the same, the contact force on the workpiece increases with the increase of penetration depth, CIPs concentration, and CIPs size. When the material hardness varies, the normal force on the workpiece increases, and the shear force decreases as the material hardness increases. Theoretical analysis and experimental results show strong consistency. This research provides what we believe to be new insights into the contact force and material removal mechanism of MRF. The research results are of significant importance for the further application of MRF.

关键词： Extreme ultraviolet lithography High power lasers Materials processing optical components optical elements optical materials

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The influence of void and fractured fiber defects on the ultrafine Z-pin and Mode I fracture toughness of CFRP laminates

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Composite Structures 2025年 366卷

作者： Fu, Yihan Zhu, Weidong Li, Shuran Li, Mengze Xiao, Jing Yan, Ling Cheng, Liang Ke, Yinglin State Key Laboratory of Fluid Power and Mechatronic System School of Mechanical Engineering Zhejiang University Hangzhou310027 China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical Engineering Zhejiang University Hangzhou310027 China

To minimize the damage caused by Z-pin insertion to the in-plane properties of the laminate, researchers have initiated investigations into the utilization of fine Z-pins and reduced insertion densities. However, the manufacturing process of fine Z-pins introduces voids and fiber fracture defects, leading to a decline in Z-pin quality and consequently affecting the efficacy of interlaminar toughening. In this research, defects in the Z-pin preparation process were identified through extensive experiments, and pre-stressing is applied during the curing of the Z-pin, leading to the successful development of the high-quality 80 μm and 90 μm diameter Z-pins. Furthermore, this research extensively examines the impact of these two defects on the quality of Z-pins and provides a model to determine the optimal Z-pin size corresponding to various insertion depths under the existing processing conditions. For example, according to the model, the optimal Z-pin size for laminates with a thickness of 4 mm is 90 μm. This ensures that the Z-pin's failure mode remains at the critical transition between pull-out and fracture, thereby maximizing its tensile strength utilization. The research findings are validated through experimental verification, thus providing insights for the application of ultrafine Z-pins. © 2025 Elsevier Ltd

关键词： Fracture toughness

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Modified Kelvin-Voigt fractional derivative model for viscoelasticity measurement in optical coherence elastography

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Chinese Optics Letters 2025年第1期23卷 93-101页

作者： Chenming Yang Zhongliang Li Nan Nan Teng Liu Yaoli Luo Xiangzhao Wang Advanced Light Source and System R&D Center Department of Advanced Optical and Microelectronic EquipmentShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

optical coherence elastography(OCE)can quantitatively obtain the viscoelasticity of tissues using rheological models and is widely applied to the clinical diagnosis of ***,commonly used rheological models in OCE do not account for the distinctive dependence of high-frequency storage and loss moduli on frequency in tissues,which results in the rheological models failing to accurately measure the viscoelastic properties of *** this paper,a modified Kelvin-Voigt fractional derivative model is presented based on the power-law behavior of soft tissues and the dependence of high-frequency complex shear modulus on frequency in living *** the rheometer and OCE tests,the modified model can provide the prediction of the power-law relationship between the low-frequency shear viscosity and frequency;compared with the Kelvin-Voigt and Kelvin-Voigt fractional derivative models,the modified model has a higher goodness-of-fit(accuracy>96%)for the high-frequency storage moduli of gelatin ***,the proposed model can reduce the root mean square error of fit by approximately 83%for the high-frequency(1–128 kHz)storage modulus of the polydimethylsiloxane phantoms obtained from publicly available ***,the modified model accurately predicts the mechanical properties of biomimetic materials over a wide frequency range,with the potential to more accurately reflect pathological changes in tissues.

关键词： optical coherence tomography optical coherence elastography viscoelasticity rheological model

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Low shrinkage Cf/SiC composites by vat photopolymerization of polycarbosilane containing precursor slurry and PIP process

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Ceramics International 2025年

作者： Jin, Baojie Li, Shan Zheng, Xinqi Hu, Chuanqi Wang, Xuye Chen, Zihuan Duan, Wenyan Liu, Bingshan Cui, Congcong Li, Wei Zhang, Ge Wang, Gong Technology and Engineering Centre of Space Utilization Chinese Academy of Sciences Beijing100094 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China Key Laboratory of Optical System Advanced Manufacturing Technology Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun130033 China

Carbon fiber reinforced silicon carbide (Cf/SiC) composites were fabricated using vat photopolymerization (VPP) technology and precursor infiltration and pyrolysis (PIP) process. The photosensitive slurry was firstly prepared by blending SiC powder, mixed photosensitive resin and chopped carbon fiber. By introducing ceramic precursor vinyl hydropolycarbosilane (VHPCS) into the photosensitive slurry, the flexural strength of the green bodies was enhanced and the linear shrinkage of the debinding bodies was decreased. When the addition of VHPCS was 20 wt%, the flexural strength of the green bodies reached 37.37 MPa, and the linear shrinkage after debinding was 3.82%. Then the influence of different chopped carbon fiber content on various properties of Cf/SiC composites was investigated. When the carbon fiber content was 15 vol%, the flexural strength and bulk density, and porosity of the Cf/SiC composites measuring 190.20 ± 18.57 MPa, 2.40 ± 0.01 g/cm3, and 1.21 ± 0.08%, respectively. TEM and XRD confirmed the existence of C, 6H-SiC, and 3C-SiC in the matrix, where 6H-SiC exhibited crystalline characteristics and 3C-SiC exhibited amorphous characteristics. This work provides a new strategy for VPP additive manufactured Cf/SiC complex structure. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Bending strength

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