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学者姓名：宋晓艳
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Abstract ：
The thermal residual stresses in diamond/MPEA (multi-principal element alloy) composites with various interlayers were analyzed using finite element method by both macro- and micro-models. Firstly, we investigated the temperature evolution in the composites during the cooling stage of the spark plasma sintering process. Then, the effects of interlayers introduced between the diamond and MPEA on the evolution and distribution of thermal residual stresses within the composites were studied. The simulation results demonstrate that incorporating a metal interlayer can effectively reduce thermal residual stress and elastic strain in the composites through plastic deformation, particularly when utilizing a metal interlayer with reduced yield strength. Comparatively, a carbide interlayer induces a high-level thermal residual stress primarily located in the carbide interlayer itself and the proximate contacting areas in diamond and the binder phase. Particularly, this stress will not decrease the mechanical properties of the composites, since it has a tensile first principal stress parallel to the interfaces formed between the carbide interlayer and metal interlayer, as well as the carbide interlayer and diamond, and a compressive third principal stress perpendicular to those interfaces. Consequently, the diamond composites with both a metal interlayer and a carbide interlayer are expected to exhibit lower levels of residual stress, which protect diamond particles from graphitization, thereby resulting in superior mechanical performance.
Keyword ：
Finite element method Finite element method Diamond composites Diamond composites Interlayer Interlayer Thermal residual stress Thermal residual stress
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| GB/T 7714 | Liu, Xuemei , Yue, Changyong , Gao, Yang et al. Effect of interlayers on thermal residual stresses in diamond/MPEA composites predicted by finite element method [J]. | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2025 , 129 . |
| MLA | Liu, Xuemei et al. "Effect of interlayers on thermal residual stresses in diamond/MPEA composites predicted by finite element method" . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 129 (2025) . |
| APA | Liu, Xuemei , Yue, Changyong , Gao, Yang , Zhao, Zhi , Zhang, Wei , Liu, Yong et al. Effect of interlayers on thermal residual stresses in diamond/MPEA composites predicted by finite element method . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2025 , 129 . |
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Abstract ：
As a typical brittle ceramic-based composite material, cemented carbides generally have very low tensile strength. Herein, a new approach is proposed to increase tensile strength of WC-Co cemented carbides by forming plate-like WC grains. Tailoring the WC grain morphology and its shape factor is achieved by varying the initial composition of the powders for sintering the cemented carbide. By optimizing the aspect ratio (AR) of the plate-like WC grains, the hardness and fracture toughness are simultaneously increased for the cemented carbide. The microscale stress and strain distributions are further analyzed, which reveal that under tensile loading, the stress concentration and strain localization in the Co and WC phases of the cemented carbides with plate-like WC grains are significantly lower than those in the counterpart with equiaxed WC grains. This inhibits the nucleation of microcracks and enhances the tensile strength of the cemented carbide. As a result, the tensile strength of the cemented carbide with plate-like WC grains at an appropriate AR is increased by 39.2% compared with that with equiaxed WC grains. Herein, a new strategy and an effective method are provided for the development of cemented carbides with high tensile strength.
Keyword ：
aspect ratio aspect ratio cemented carbides cemented carbides tensile strength tensile strength plate-like WC grain plate-like WC grain
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| GB/T 7714 | Zhang, He , Lu, Hao , Zhao, Zhi et al. Modulating WC Grain Shape to Enhance Tensile Strength of Cemented Carbides [J]. | ADVANCED ENGINEERING MATERIALS , 2025 . |
| MLA | Zhang, He et al. "Modulating WC Grain Shape to Enhance Tensile Strength of Cemented Carbides" . | ADVANCED ENGINEERING MATERIALS (2025) . |
| APA | Zhang, He , Lu, Hao , Zhao, Zhi , Liu, Xuemei , Wang, Haibin , Song, Xiaoyan . Modulating WC Grain Shape to Enhance Tensile Strength of Cemented Carbides . | ADVANCED ENGINEERING MATERIALS , 2025 . |
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Abstract ：
Remarkable trade-off paradoxes widely exist among different magnetic properties of permanent magnetic alloys, especially between saturation magnetization and coercivity, largely impeding the improvement of comprehensive properties. Taking Sm-Co-based alloys as an example, this study proposed a new data-driven material design strategy to dissolve the saturation magnetization-coercivity trade-off and enhance the comprehensive magnetic properties. The machine learning approach and multi-objective optimization method were applied to establish a model for composition design and microstructure regulation to simultaneously maximize saturation magnetization and coercivity. It was found that the electronegativity of the doping element is a key feature that affects both the saturation magnetization and coercivity, and the Pareto front with appropriate alloy composition and grain size was obtained. The materials with best comprehensive magnetic properties in the optimal set were selected for experimental preparation, and the results fully verified the model predictions. The machine learning model and multi-objective optimization method established in this study break through the trade-off between saturation magnetization and coercivity of Sm-Co-based alloys, and the strategy for synergistic improvement of the mutually exclusive properties is appliable to a variety of multi-objective materials design issues.
Keyword ：
Saturation magnetization Saturation magnetization Coercivity Coercivity Permanent magnetic alloys Permanent magnetic alloys Multi-objective optimization Multi-objective optimization Data-driven Data-driven
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| GB/T 7714 | Liu, Peixin , Lu, Hao , Xu, Guojing et al. Breaking through the trade-off between saturation magnetization and coercivity: A data-driven strategy [J]. | ACTA MATERIALIA , 2025 , 289 . |
| MLA | Liu, Peixin et al. "Breaking through the trade-off between saturation magnetization and coercivity: A data-driven strategy" . | ACTA MATERIALIA 289 (2025) . |
| APA | Liu, Peixin , Lu, Hao , Xu, Guojing , Cheng, Feng , Han, Chongyu , Song, Xiaoyan . Breaking through the trade-off between saturation magnetization and coercivity: A data-driven strategy . | ACTA MATERIALIA , 2025 , 289 . |
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Abstract ：
In this work, multilayer graphene (MLG) was incorporated into the WC-ZrO2 composite to enhance its comprehensive mechanical properties. The phase compositions of the mixed powder with varying MLG contents, together with the microstructures and mechanical properties of the sintered WC-ZrO2-MLG composites were studied in detail. Utilizing a novel powder dispersion method, a uniform distribution of MLG was achieved in the WC-ZrO2 mixed powder. The prepared WC-ZrO2 composite with an optimal amount of dispersed MLG exhibited concurrently increased hardness and fracture toughness. The significant enhancement of fracture toughness is primarily attributed to the deflection and branching of cracks in multiple directions upon encountering MLG, as well as the pull-out and bridging effects from MLG during crack propagation. This study provides a new strategy for toughening ceramic materials and enhancing their comprehensive properties.
Keyword ：
Mechanical properties Mechanical properties Multilayer graphene (MLG) Multilayer graphene (MLG) Powder dispersion Powder dispersion Toughening mechanism Toughening mechanism WC-ZrO 2 composite WC-ZrO 2 composite
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| GB/T 7714 | Liu, Xuemei , Liang, Zhantao , Wang, Haibin et al. Mechanical properties and toughening mechanisms of multilayer graphene contained WC-ZrO2 composite [J]. | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2025 , 128 . |
| MLA | Liu, Xuemei et al. "Mechanical properties and toughening mechanisms of multilayer graphene contained WC-ZrO2 composite" . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 128 (2025) . |
| APA | Liu, Xuemei , Liang, Zhantao , Wang, Haibin , Wang, Qingteng , Lu, Hao , Liu, Chao et al. Mechanical properties and toughening mechanisms of multilayer graphene contained WC-ZrO2 composite . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2025 , 128 . |
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Abstract ：
Swelling positively in water is a common behavior of hydrogels, which, however, can lead to reduced mechanical performance and stability. Enabling negative swelling represents a promising way to address those issues but is extremely challenging to realize. Here, real negative swelling hydrogels are successfully prepared for the first time through a unique molecular architecture. Specifically designed interpenetrating transformable-rigid polymer network undergoes self-assembly and collapses upon hydration, which in turn dehydrates itself. This paradoxical hydration-induced-dehydration process brings about revolutionary outcomes. Gels can now lose up to 35% weight underwater and exhibit water-strengthened mechanical properties, enhanced structural responsiveness, underwater repair ability, resistance to deformation, and swelling turn-off effect. Those unique properties allow future material development and applications to be carried out in much broader dimensions.
Keyword ：
hydrogel hydrogel negative swelling negative swelling unique underwater behaviors unique underwater behaviors interpenetrating polymer network interpenetrating polymer network hydration-induced-dehydration hydration-induced-dehydration
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| GB/T 7714 | Zhao, Zhi , Zheng, Xiaotong , Li, Yurong et al. Hydration Induces Dehydration: Creating Negative Swelling Gel by a Paradox [J]. | ADVANCED MATERIALS , 2025 . |
| MLA | Zhao, Zhi et al. "Hydration Induces Dehydration: Creating Negative Swelling Gel by a Paradox" . | ADVANCED MATERIALS (2025) . |
| APA | Zhao, Zhi , Zheng, Xiaotong , Li, Yurong , Yao, Xuan , Wang, Haibin , Liu, Xuemei et al. Hydration Induces Dehydration: Creating Negative Swelling Gel by a Paradox . | ADVANCED MATERIALS , 2025 . |
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Abstract ：
In this work, the effects of composition, carbide grain size, and WC matrix structure on the mechanical properties of low-density WC-TiC-Co cemented carbides have been studied. It is found that increasing the TiC content promotes WC dissolution into TiC to form a (Ti,W)C solid solution. When the TiC particle size exceeds approximate to 2 mu m, the sintered alloys exhibit a mixed microstructure of (Ti,W)C and core-shell-structured (Ti,W)C@TiC grains. Refining TiC to the ultrafine scale eliminates the core-shell structures and generates a transition layer between WC and (Ti,W)C phases. This transition layer forms coherent and semi-coherent interfaces with the adjacent carbides through lattice distortion and dislocation accommodation, which enhances interfacial bonding and increases intergranular fracture resistance. Furthermore, by incorporating ultrafine WC-Co composite powder to partially replace submicron WC, a bimodal grain microstructure is obtained in the sintered alloy, along with the formation of numerous Co-rich nanoparticles within WC grains. The prepared WC-TiC-Co cemented carbides with optimized TiC content and particle size achieve reduced density and enhanced mechanical properties simultaneously. The present findings provide new insights into strengthening and toughening of low-density cemented carbide materials.
Keyword ：
mechanical properties mechanical properties strengthening and toughening mechanisms strengthening and toughening mechanisms WC-TiC-Co cemented carbides WC-TiC-Co cemented carbides composite powders composite powders
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| GB/T 7714 | Xuan, Shilei , Wang, Haibin , Shang, Huijun et al. Enhancement of Mechanical Properties of Low-Density WC-TiC-Co Cemented Carbides [J]. | ADVANCED ENGINEERING MATERIALS , 2025 . |
| MLA | Xuan, Shilei et al. "Enhancement of Mechanical Properties of Low-Density WC-TiC-Co Cemented Carbides" . | ADVANCED ENGINEERING MATERIALS (2025) . |
| APA | Xuan, Shilei , Wang, Haibin , Shang, Huijun , Lu, Hao , Liu, Xuemei , Song, Xiaoyan . Enhancement of Mechanical Properties of Low-Density WC-TiC-Co Cemented Carbides . | ADVANCED ENGINEERING MATERIALS , 2025 . |
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Abstract ：
Refractory high-entropy alloys (RHEAs) are susceptible to phase transition at elevated temperatures, inducing deviation in the phase constitution from the intended design hence affecting the performance significantly. Accurate prediction of phase constitution and modulation of phase stability over a broad temperature range is crucial to develop RHEAs with superior properties. In this study, thermodynamic and first-principles calculations were integrated to investigate the temperature-dependent phase constitution in the CrTaVW alloy system. The effect of V and W atoms occupation sites on the stability of TaCr2 2 Laves phase was evaluated. Both V or W atoms tend to occupy Cr sites in TaCr2, 2 , and V exhibits stronger alloying ability than W due to the reduced electronic density at the Fermi level. Moreover, with increasing the doping content, the V and W exhibit opposite influencing trends on the formation and structural stability of TaCr2 2 Laves phase. The Gibbs free energies of the Laves phase and solid solutions with variable compositions were obtained, enabling predictions for the critical temperatures of the phase transitions. The predicted behaviors of phase transitions were validated by experiments. This study provides guidance for modulating phase constitution and achieving desirable phase stability in RHEAs.
Keyword ：
First-principles calculation First-principles calculation Refractory high-entropy alloys Refractory high-entropy alloys Phase constitution Phase constitution Phase transition Phase transition
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| GB/T 7714 | Fu, Xiaoyu , Li, Yurong , Hou, Chao et al. Phase stability and transition of CrTaVW high-entropy alloy [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1002 . |
| MLA | Fu, Xiaoyu et al. "Phase stability and transition of CrTaVW high-entropy alloy" . | JOURNAL OF ALLOYS AND COMPOUNDS 1002 (2024) . |
| APA | Fu, Xiaoyu , Li, Yurong , Hou, Chao , Lu, Hao , Song, Xiaoyan . Phase stability and transition of CrTaVW high-entropy alloy . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1002 . |
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Abstract ：
The hardness of cemented carbides is a fundamental property that plays a significant role in their design, preparation, and application evaluation. This study aims to identify the critical factors affecting the hardness of WC-Co cemented carbides and develop a high-throughput predictive model for hardness. A dataset consisting of raw material composition, sintering parameters and characterization results of cemented carbides is constructed in which the hardness of cemented carbide is set as the target variable. By analyzing the Pearson correlation coefficient, Shapley additive explanations (SHAP) results, WC grain size and Co content are determined to be the key characteristics influencing the hardness of cemented carbide. Subsequently, machine learning models such as support vector regression (SVR), polynomial regression (PR), gradient boosting decision tree (GBDT), and random forest (RF) are optimized to construct prediction models for hardness. Evaluations using 10-fold cross-validation demonstrate that the GBDT algorithm model exhibits the highest accuracy and strong generalization capability, making it most suitable for predicting and analyzing the hardness of cemented carbides. Based on predictions from GBDT algorithm model, PR algorithm model is established to achieve high-precision interpretable prediction of the hardness of cemented carbides. As a result, a quantitative relationship between hardness and Co content and WC grain size is obtained, demonstrating that reducing grain size and Co content is the key to obtaining high hardness of cemented carbide. This research provides a data-driven method for accurately and efficiently predicting cemented carbide properties, presenting valuable insights for the design and development of high-performance cemented carbide materials. [GRAPHICS] .
Keyword ：
machine learning machine learning hardness hardness cemented carbide cemented carbide high-throughput prediction high-throughput prediction
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| GB/T 7714 | Song Rui , Liu Xue-Mei , Wang Hai-Bin et al. Hardness prediction of WC-Co cemented carbide based on machine learning model [J]. | ACTA PHYSICA SINICA , 2024 , 73 (12) . |
| MLA | Song Rui et al. "Hardness prediction of WC-Co cemented carbide based on machine learning model" . | ACTA PHYSICA SINICA 73 . 12 (2024) . |
| APA | Song Rui , Liu Xue-Mei , Wang Hai-Bin , Lu Hao , Song Xiao-Yan . Hardness prediction of WC-Co cemented carbide based on machine learning model . | ACTA PHYSICA SINICA , 2024 , 73 (12) . |
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Abstract ：
Shaping hard and brittle materials, e.g. cermets, at micrometer resolution has long been known challenging for both mechanical machining and high energy beam based additive manufacturing. Digital light processing (DLP), which features great printing quality and decent precision, unfortunately lacks capability to deal with the popular slurry-typed cermet precursor due to the tremendous optical absorption by its particles. Here, an innovative protocol based on a versatile collapsable matrix is devised to allow high-precision printing of WC-Co cermets on DLP platform. By tuning the external environment, this matrix attenuates composite powders to facilitate photopolymerization at the printing stage, and shrinks to condense green parts prior to thermal sintering. The as-obtained samples by collapsable matrix assisted DLP can reach a relative density of approximate to 90%, a record-breaking resolution of approximate to 10 mu m, and a microhardness of up to 14.5 GPa. Complex delicate structures, including school emblem, honeycomb, and micro-drill can be directly fabricated, which has never been achieved before. Impressively, the as-obtained micro-drill is able to be directly used in drilling tasks. The above strategy represents a great progress in DLP by enabling shaping strong light attenuating materials at high resolution. Such advantages are ideal for the next generation ceramic-metal composite additive manufacturing. High-precision printing of WC-Co cermets is achieved by collapsable matrix assisted digital light processing (DLP). Such strategy represents a great progress in DLP by enabling shaping strong light attenuating precursors at high resolution. The product features 10 mu m level details, decent relative density and high microhardness, which allows for direct application in drilling tasks. image
Keyword ：
digital light processing digital light processing high-precision high-precision composite materials composite materials additive manufacturing additive manufacturing collapsable matrix collapsable matrix
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| GB/T 7714 | Shan, Yupeng , Zhao, Zhi , Wang, Haibin et al. High-Precision Printing of Cermets by Collapsable Matrix Assisted Digital Light Processing [J]. | SMALL , 2024 . |
| MLA | Shan, Yupeng et al. "High-Precision Printing of Cermets by Collapsable Matrix Assisted Digital Light Processing" . | SMALL (2024) . |
| APA | Shan, Yupeng , Zhao, Zhi , Wang, Haibin , Li, Yurong , Wang, Yue , Xing, Ming et al. High-Precision Printing of Cermets by Collapsable Matrix Assisted Digital Light Processing . | SMALL , 2024 . |
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Abstract ：
Calculating the Curie temperature of rare-earth permanent magnetic materials has remained a big theoretical challenge. In this study, based on a home-built Sm-Co-based alloys database, a data-driven machine learning approach was developed to predict the Curie temperature of Sm-Co-based alloys. High-throughput predictions of Curie temperature were achieved using a genetic program based symbolic regression model. A classification model based on logistic regression was established to quantify the effect of doping on the Curie temperature of Sm-Co-based alloys. The key physical descriptor affecting Curie temperature was extracted from the established machine learning models, and the Curie temperature sensitivity coefficient was defined. It was discovered that the doping elements with large electrical conductivity and similar heat of fusion to that of Sm are likely to increase the Curie temperature of Sm-Co-based alloys. The model predictions were verified quantitatively by the experimental results of a series of prepared Sm-Co-based samples. This work provides a high-efficiency method for developing Sm-Co-based permanent magnets with high Curie temperatures.
Keyword ：
Sensitivity factor Sensitivity factor Doping element Doping element Curie temperature Curie temperature Machine learning Machine learning Sm-Co alloys Sm-Co alloys
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| GB/T 7714 | Xu, Guojing , Cheng, Feng , Lu, Hao et al. Predicting the Curie temperature of Sm-Co-based alloys via data-driven strategy [J]. | ACTA MATERIALIA , 2024 , 274 . |
| MLA | Xu, Guojing et al. "Predicting the Curie temperature of Sm-Co-based alloys via data-driven strategy" . | ACTA MATERIALIA 274 (2024) . |
| APA | Xu, Guojing , Cheng, Feng , Lu, Hao , Hou, Chao , Song, Xiaoyan . Predicting the Curie temperature of Sm-Co-based alloys via data-driven strategy . | ACTA MATERIALIA , 2024 , 274 . |
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