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学者姓名：宋晓艳
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摘要 ：
W-Cu composites are commonly subjected to coupled multiple fields in service, which imposes high requirements on their overall performance. In this study, the ultrafine-grained W-Cu composite was fabricated using the combination of electroless plating and spark plasma sintering. The wear resistance and high-temperature compressive properties of the ultrafine-grained W-Cu composite were investigated and compared with those of the commercial coarse-grained counterpart. Moreover, the underlying strengthening and wear mechanisms were also discussed. Here we show that the ultrafine-grained W-Cu composite exhibits superior integrated mechanical performance, making it a potential alternative to commercial W-Cu composites.
关键词 ：
grain refinement grain refinement W-Cu composites W-Cu composites high-temperature performance high-temperature performance wear resistance wear resistance
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| GB/T 7714 | Han, Tielong , Hou, Chao , Sun, Yaochuan et al. Effect of Grain Refinement on the Comprehensive Mechanical Performance of W-Cu Composites [J]. | NANOMATERIALS , 2023 , 13 (3) . |
| MLA | Han, Tielong et al. "Effect of Grain Refinement on the Comprehensive Mechanical Performance of W-Cu Composites" . | NANOMATERIALS 13 . 3 (2023) . |
| APA | Han, Tielong , Hou, Chao , Sun, Yaochuan , Li, Yurong , Song, Xiaoyan . Effect of Grain Refinement on the Comprehensive Mechanical Performance of W-Cu Composites . | NANOMATERIALS , 2023 , 13 (3) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The stress-strain behaviors of WC-Co cermets with various binder contents were investigated, in which the residual thermal stress (RTS) was taken into account. The effects of binder content and WC grain morphology on the RTS and strain responses under applied stress were quantified by finite element modeling based on the real microstructures of cermets. It shows that the RTS of both the hard matrix and ductile binder phases are linear functions of the binder content. High-level RTS is concentrated in the WC region close to WC/WC grain boundaries adjacent to the Co phase, and in the Co region close to the WC/Co interface, respectively. In the cermets with RTS, the accumulation rate of strain partitioning and strain localization in WC-Co cermets decreases with the decrease of Co content. It is found that increasing the proportion of thin Co layers parallel to the compression direction is beneficial to simultaneously strengthening and toughening cermets with low Co contents. This study provides access and mechanisms for modulating RTS distribution to achieve excellent comprehensive mechanical properties of cermets with various binder content.
关键词 ：
Strain localization Strain localization Fracture toughness Fracture toughness Binder content Binder content Stress distribution Stress distribution
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| GB/T 7714 | Chen, Jinghong , Lu, Hao , Wang, Haibin et al. Stress-strain behaviors of cermets with various binder contents and residual thermal stress states [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2022 , 842 . |
| MLA | Chen, Jinghong et al. "Stress-strain behaviors of cermets with various binder contents and residual thermal stress states" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 842 (2022) . |
| APA | Chen, Jinghong , Lu, Hao , Wang, Haibin , Tang, Fawei , Liu, Xuemei , Song, Xiaoyan . Stress-strain behaviors of cermets with various binder contents and residual thermal stress states . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2022 , 842 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Due to the complex crystal structures and interatomic interactions, the prediction of magnetic properties and effective composition design of rare earth permanent magnets are quite difficult. As the most promising permanent magnets for high-temperature applications, Sm-Co alloys have been developed for several decades by intuition, experience and trial-and-error methods. In this work, rapid and accurate prediction of saturation magnetization of Sm-Co alloys was realized by machine learning integrated with selection of characteristics of constituent elements, such as pseudopotential core radius, heat of fusion, boiling point, valence electron number and covalent radius. Based on the data-driven strategy and the proposed criteria for elements selection, new-type Sm-Co based alloys with excellent comprehensive magnetic performance were prepared. The methods of feature construction and optimal multistep feature selection in machine learning loops developed in this study are applicable for properties prediction and composition design of a series of multicomponent alloys.
关键词 ：
Machine learning Machine learning Sm-Co magnets Sm-Co magnets Saturation magnetization Saturation magnetization Feature selection Feature selection
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| GB/T 7714 | Guo, Kai , Lu, Hao , Zhao, Zhi et al. Magnetic performance oriented composition design of Sm-Co based alloys by machine learning and experimental studies [J]. | COMPUTATIONAL MATERIALS SCIENCE , 2022 , 205 . |
| MLA | Guo, Kai et al. "Magnetic performance oriented composition design of Sm-Co based alloys by machine learning and experimental studies" . | COMPUTATIONAL MATERIALS SCIENCE 205 (2022) . |
| APA | Guo, Kai , Lu, Hao , Zhao, Zhi , Tang, Fawei , Wang, Haibin , Song, Xiaoyan . Magnetic performance oriented composition design of Sm-Co based alloys by machine learning and experimental studies . | COMPUTATIONAL MATERIALS SCIENCE , 2022 , 205 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Excellent mechanical and physical properties are usually mutually exclusive in W-Cu composites, which makes it challenging to achieve outstanding comprehensive performance. In the present work, improved copper connectivity and uniformly dispersed ultrafine tungsten particles were achieved in the ultrafine grained (UFG) W-Cu composites. The as-prepared UFG W-Cu composites exhibited enhanced combination of hardness, compressive strength and electrical conductivity compared with those reported in the literature. Specifically, the UFG W-30Cu composite showed a compressive strength over 1200 MPa (2.1 times that of the coarse grained counterpart), a hardness of 357 HV and an electrical conductivity of 48.6%IACS. The strengthening mechanisms of the presented W-Cu composites were quantitatively discussed in terms of grain refinement, stress transfer and dislocations strengthening. This study provides a novel approach for the synthesis of W-Cu composites with excellent comprehensive properties.
关键词 ：
Electrical properties Electrical properties Mechanical properties Mechanical properties Metal-matrix composites Metal-matrix composites Strengthening mechanism Strengthening mechanism Powder processing Powder processing
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| GB/T 7714 | Han, Tielong , Hou, Chao , Zhao, Zhi et al. W-Cu composites with excellent comprehensive properties [J]. | COMPOSITES PART B-ENGINEERING , 2022 , 233 . |
| MLA | Han, Tielong et al. "W-Cu composites with excellent comprehensive properties" . | COMPOSITES PART B-ENGINEERING 233 (2022) . |
| APA | Han, Tielong , Hou, Chao , Zhao, Zhi , Huang, Xintao , Tang, Fawei , Li, Yurong et al. W-Cu composites with excellent comprehensive properties . | COMPOSITES PART B-ENGINEERING , 2022 , 233 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The WC-Co cemented carbides with near fully-dense and crack-free microstructure were fabricated by the laser powder bed fusion (LPBF) process and a subsequent heat-treatment. The microstructures and mechanical properties of the as-printed and heat-treated cemented carbide specimens were investigated in detail. The formation mechanisms and control method of the microstructural defects in LPBF printed cemented carbides were proposed. A number of particles of 2.5 nm-2.0 mu m formed in WC grains after heat-treatment. The nano-sized particles have a coherent interface with the WC matrix. The formation mechanisms of the particles and their effect on the enhancement of mechanical properties of the cemented carbides were demonstrated. Furthermore, the cutting performance of the LPBF printed cemented carbides inserts was tested under actual working conditions, which exhibited excellent service properties and promising application prospects.
关键词 ：
Laser powder bed fusion Laser powder bed fusion Mechanical properties Mechanical properties Cutting performance Cutting performance Nanoparticles Nanoparticles Cemented carbides inserts Cemented carbides inserts
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| GB/T 7714 | Xing, Ming , Wang, Haibin , Zhao, Zhi et al. Additive manufacturing of cemented carbides inserts with high mechanical performance [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2022 , 861 . |
| MLA | Xing, Ming et al. "Additive manufacturing of cemented carbides inserts with high mechanical performance" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 861 (2022) . |
| APA | Xing, Ming , Wang, Haibin , Zhao, Zhi , Lu, Hao , Liu, Chao , Lin, Liangliang et al. Additive manufacturing of cemented carbides inserts with high mechanical performance . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2022 , 861 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In this work, WCoB was introduced into ultra-coarse cemented carbides for improving the oxidation- and wearresistance at elevated temperatures. At the initial oxidation stage, WCoB addition had a slight effect on the oxidation rate, but enhanced the wear resistance obviously by restraining the WC grains from pull-out and fracture as the Co binder phase was preferentially removed during the wear process. At the rapid oxidation stage, the wear rate of the WCoB-containing cemented carbide was drastically decreased compared to that of the straight WC-Co. The wear of the cemented carbide was mainly caused by the removal of the oxide layer and the spalling of materials under the surface layer. WCoB inhibited the oxidation and enhanced the wear resistance of the ultra-coarse cemented carbides by forming liquid B2O3 in the oxidation layer and sharing the stress with WC matrix before oxidation.
关键词 ：
Wear resistance Wear resistance High temperature High temperature Oxidation Oxidation Ultra-coarse cemented carbide Ultra-coarse cemented carbide WCoB WCoB
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| GB/T 7714 | Liu, Xuemei , Liang, Zhantao , Wang, Haibin et al. Wear resistance of ultra-coarse WC-WCoB-Co cemented carbide at different oxidation stages [J]. | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2022 , 105 . |
| MLA | Liu, Xuemei et al. "Wear resistance of ultra-coarse WC-WCoB-Co cemented carbide at different oxidation stages" . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 105 (2022) . |
| APA | Liu, Xuemei , Liang, Zhantao , Wang, Haibin , Zhao, Zhi , Liu, Chao , Lu, Hao et al. Wear resistance of ultra-coarse WC-WCoB-Co cemented carbide at different oxidation stages . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2022 , 105 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
基于构建适用于第一性原理计算、原子比例准确为Sm∶Co=1∶7的晶体结构模型,依据实验研究中得到的物相共存结果,对Mn和In掺杂的Sm-Co体系模型进行了系列计算分析。利用热力学计算方法,定量化研究了Mn和In在Sm-Co体系中优先占位特点及掺杂元素占位概率随温度的变化规律。通过Sm-Co合金掺杂体系的能量和电子结构计算,研究了Mn和In单掺杂SmCo_7体系的结构稳定性。基于计算结果揭示了Mn和In对掺杂合金体系中原子间相互作用的影响,阐明了提升体系结构稳定性的微观机制,并提出了Mn添加可增加SmCo_7合金的总磁矩,揭示了掺杂元素对SmCo_7合金饱和磁化强度的影响规律。
关键词 ：
结构稳定性 结构稳定性 第一性原理计算 第一性原理计算 元素掺杂 元素掺杂 Sm-Co基永磁合金 Sm-Co基永磁合金 磁矩 磁矩
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| GB/T 7714 | 毛斐 , 吕皓 , 唐法威 et al. Mn和In添加对SmCo_7结构稳定性及磁矩影响的第一性原理计算 [J]. | 金属学报 , 2021 , 57 (07) : 948-958 . |
| MLA | 毛斐 et al. "Mn和In添加对SmCo_7结构稳定性及磁矩影响的第一性原理计算" . | 金属学报 57 . 07 (2021) : 948-958 . |
| APA | 毛斐 , 吕皓 , 唐法威 , 郭凯 , 刘东 , 宋晓艳 . Mn和In添加对SmCo_7结构稳定性及磁矩影响的第一性原理计算 . | 金属学报 , 2021 , 57 (07) , 948-958 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
以原位还原碳化技术制备的WC-8Co复合粉和VC粉末为原料,采用低压烧结技术制备出超细晶硬质合金。系统研究了VC添加量和复合粉中碳含量对硬质合金的相组成、显微组织、室温和高温力学性能的影响。结果表明:硬质合金的晶粒尺寸、硬度和断裂韧性主要受VC添加量的影响,且随VC添加量的增加呈单调变化;抗弯强度随VC添加量的变化趋势与碳含量有关;压缩强度随温度的变化呈现先降低后升高的趋势;当WC-Co复合粉的碳含量为5.60%～5.68%(质量分数)、VC添加量不超过0.5%时,可分别制备出室温抗弯强度为4482MPa和600℃下抗压缩强度为4914MPa的高综合性能的超细晶硬质合金。基于微观组织特征的分析...
关键词 ：
VC添加 VC添加 高温压缩性能 高温压缩性能 超细晶硬质合金 超细晶硬质合金 碳含量 碳含量 力学性能 力学性能
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| GB/T 7714 | 李雨衡 , 刘雪梅 , 刘超 et al. VC和碳含量对超细晶硬质合金室温和高温性能的影响 [J]. | 稀有金属材料与工程 , 2021 , 50 (06) : 2169-2176 . |
| MLA | 李雨衡 et al. "VC和碳含量对超细晶硬质合金室温和高温性能的影响" . | 稀有金属材料与工程 50 . 06 (2021) : 2169-2176 . |
| APA | 李雨衡 , 刘雪梅 , 刘超 , 吕皓 , 宋晓艳 . VC和碳含量对超细晶硬质合金室温和高温性能的影响 . | 稀有金属材料与工程 , 2021 , 50 (06) , 2169-2176 . |
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摘要 ：
首先探究了以Nb2O5、Co和炭黑的原位反应制备纳米NbC-Co复合粉末的最佳工艺,然后以此复合粉作为添加剂,研究了其对低压烧结制备WC-Co硬质合金组织和性能的影响.热力学计算和原位反应实验结果表明,原料粉末中未添加Co时存在明显的Nb2O5→NbO2→NbC两段反应过程,而添加Co不仅显著降低了反应发生温度,还使Nb2O5的还原、碳化两步反应几乎同时进行.通过优化原料粉末的配碳量、反应温度,制备的NbC-Co复合粉物相纯净,具有较低的氧含量,平均粒径为82nm.添加纳米NbC-Co使制备的WC-Co硬质合金的晶粒尺寸由0.7 μm降低至0.48 μm,组织更为均匀,室温和高温硬度均明显提高.即使温度达到800℃,制备的WC-12Co-1NbC硬质合金的硬度仍维持在890HV3?.
关键词 ：
原位合成 原位合成 硬质合金 硬质合金 纳米NbC-Co复合粉 纳米NbC-Co复合粉 高温硬度 高温硬度
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| GB/T 7714 | 王海滨 , 占王彬 , 刘雪梅 et al. 纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用 [J]. | 粉末冶金工业 , 2021 , 31 (1) : 9-16 . |
| MLA | 王海滨 et al. "纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用" . | 粉末冶金工业 31 . 1 (2021) : 9-16 . |
| APA | 王海滨 , 占王彬 , 刘雪梅 , 刘超 , 侯超 , 宋晓艳 . 纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用 . | 粉末冶金工业 , 2021 , 31 (1) , 9-16 . |
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摘要 ：
纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用
关键词 ：
原位合成 原位合成 硬质合金 硬质合金 纳米NbC-Co复合粉 纳米NbC-Co复合粉 高温硬度 高温硬度
引用：
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| GB/T 7714 | 王海滨 , 占王彬 , 刘雪梅 et al. 纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用 [J]. | 王海滨 , 2021 , 31 (1) : 9-16 . |
| MLA | 王海滨 et al. "纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用" . | 王海滨 31 . 1 (2021) : 9-16 . |
| APA | 王海滨 , 占王彬 , 刘雪梅 , 刘超 , 侯超 , 宋晓艳 et al. 纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用 . | 王海滨 , 2021 , 31 (1) , 9-16 . |
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