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学者姓名：韩晓东
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摘要 ：
Solid solutions are ubiquitous in metals and alloys. Local chemical ordering (LCO) is a fundamental sub-nano/nanoscale process that occurs in many solid solutions and can be used as a microstructure to optimize strength and ductility. However, the formation of LCO has not been fully elucidated, let alone how to provide efficient routes for designing LCO to achieve synergistic effects on both superb strength and ductility. Herein, we propose the formation and control of LCO in negative enthalpy alloys. With engineering negative enthalpy in solid solutions, genetic LCO components are formed in negative enthalpy refractory high-entropy alloys (RHEAs). In contrast to conventional 'trial-and-error' approaches, the control of LCO by using engineering negative enthalpy in RHEAs is instructive and results in superior strength (1160 MPa) and uniform ductility (24.5%) under tension at ambient temperature, which are among the best reported so far. LCO can promote dislocation cross-slip, enhancing the interaction between dislocations and their accumulation at large tensile strains; sustainable strain hardening can thereby be attained to ensure high ductility of the alloy. This work paves the way for new research fields on negative enthalpy solid solutions and alloys for the synergy of strength and ductility as well as new functions. Negative enthalpy alloys act as a new concept and route for introducing various degree of local chemical ordering heterostructures, leading to superb synergy of strength and ductility.
关键词 ：
local chemical ordering local chemical ordering dislocation dislocation negative enthalpy alloys negative enthalpy alloys strength strength ductility ductility
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| GB/T 7714 | An, Zibing , Yang, Tao , Shi, Caijuan et al. Negative enthalpy alloys and local chemical ordering: a concept and route leading to synergy of strength and ductility [J]. | NATIONAL SCIENCE REVIEW , 2024 , 11 (4) . |
| MLA | An, Zibing et al. "Negative enthalpy alloys and local chemical ordering: a concept and route leading to synergy of strength and ductility" . | NATIONAL SCIENCE REVIEW 11 . 4 (2024) . |
| APA | An, Zibing , Yang, Tao , Shi, Caijuan , Mao, Shengcheng , Wang, Lihua , Li, Ang et al. Negative enthalpy alloys and local chemical ordering: a concept and route leading to synergy of strength and ductility . | NATIONAL SCIENCE REVIEW , 2024 , 11 (4) . |
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摘要 ：
本发提供一种第五代镍基单晶高温合金及其热处理方法。按质量百分比包括：Cr：2.0～5.0％，Al：4.0～7.0％，Co：7.0～12.0％，Mo：1.0～3.5％，Ti：0.5～2.0％，Ta：6.0～9.0％，W：3.0～7.0％，Re：4.0～6.5％，Ru：4.0～6.5％，Hf：0～0.1％，其中Ta/Al为1.3‑1.5，其余为Ni和不可避免的杂质；采用连续式升温固溶处理，当温度升至1295℃～1305℃后，以2.5℃～5.0℃/h的升温速率升温至1345℃～1355℃。该合金具有优异的高温蠕变性能，其在1110℃，137MPa条件下蠕变寿命可达748h，达到国际第五代合金的水平。
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| GB/T 7714 | 龙海波 , 赵俊博 , 韩晓东 et al. 一种第五代镍基单晶高温合金及其热处理方法 : CN202310895937.9[P]. | 2023-07-20 . |
| MLA | 龙海波 et al. "一种第五代镍基单晶高温合金及其热处理方法" : CN202310895937.9. | 2023-07-20 . |
| APA | 龙海波 , 赵俊博 , 韩晓东 , 张泽 . 一种第五代镍基单晶高温合金及其热处理方法 : CN202310895937.9. | 2023-07-20 . |
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摘要 ：
本发明公开了一种在透射电子显微镜中，为纳米金属样品提供原子级原位等静压力学性能测试的装置及方法。本发明属于纳米材料显微结构原位测试及表征技术领域。本发明创新性地设计了一种新的等静压容器装置：采用微操作技术将纳米金属样品加载并封装在两个碳纳米锥中间，即可获得一种等静压容器。更重要的是，该设计还创新性地实现了金属样品在透射电子显微镜中的原位等静压力学性能测试：通过探针挤压碳纳米锥的侧壁，对等静压环境中的金属样品施加等静压力，从而实现金属样品在透射电子显微镜中的原位等静压力学性能测试，静压大小可控。
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| GB/T 7714 | 王立华 , 李超杰 , 徐建勋 et al. 原位测量金属材料的力学性能及微观结构的装置及方法 : CN202310675436.X[P]. | 2023-06-07 . |
| MLA | 王立华 et al. "原位测量金属材料的力学性能及微观结构的装置及方法" : CN202310675436.X. | 2023-06-07 . |
| APA | 王立华 , 李超杰 , 徐建勋 , 韩晓东 , 赵宇亮 . 原位测量金属材料的力学性能及微观结构的装置及方法 : CN202310675436.X. | 2023-06-07 . |
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摘要 ：
Investigating the diffusion behavior of binary system is crucial for understanding the solid-state diffusion in metallic joints, as it affects the interfacial reaction that forms intermetallic components (IMCs) and introduces Kirkendall voids that change the interfacial microstructures. In this study, we intuitively investigated the interfacial diffusion behavior of Copper-Zinc alloy binary interface by in situ transmission electron microscopy. Our findings revealed the interfacial diffusion of atoms, the growth processes of intermetallic phases, and the evolution of the Kirkendall voids during thermal diffusion. We observed that the Zn atoms diffuse rapidly into Cu and form the 13 phase at the onset of thermal diffusion at 200 & DEG;C. Additionally, with increasing temperature, Cu atoms control the diffusion and the formation of IMCs due to their higher diffusion coefficient in the 13 and & alpha; phases, which are 2.09 & PLUSMN; 0.63 x 10-16 m2/s at 250 & DEG;C and 3.44 & PLUSMN; 0.44 x 10-17 m2/s at 300 & DEG;C, respectively. Furthermore, we found that the interface significantly influences the interdiffusion rates of the IMCs and the formation of Kirkendall voids. The emergence of voids, which are formed at the initial defective site and the IMC layer at the temperature of 250 and 300 & DEG;C, respectively, leading to a considerable decrease in interdiffusion at the binary interface of two orders of magnitude in comparison to unaffected regions. Moreover, we revealed the evolution of Kirkendall void, involving the formation and merging of holes, as well as the gradual thinning of atomic layers during diffusion. These findings are essential for understanding the formation and evolution of IMCs and Kirkendall void in binary interfaces.
关键词 ：
Intermetallic components Intermetallic components Cu-Zn alloy interface Cu-Zn alloy interface Kirkendall void Kirkendall void Interfacial diffusion Interfacial diffusion In situ transmission electron microscopy In situ transmission electron microscopy
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| GB/T 7714 | Xie, Lilin , Lu, Hui , Jiao, Yilin et al. Interfacial diffusion and Kirkendall voids evolution in the Copper-Zinc alloy binary interface revealed by in situ transmission electron microscopy [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 968 . |
| MLA | Xie, Lilin et al. "Interfacial diffusion and Kirkendall voids evolution in the Copper-Zinc alloy binary interface revealed by in situ transmission electron microscopy" . | JOURNAL OF ALLOYS AND COMPOUNDS 968 (2023) . |
| APA | Xie, Lilin , Lu, Hui , Jiao, Yilin , Qiao, Shihang , Zheng, Yisheng , Li, Ang et al. Interfacial diffusion and Kirkendall voids evolution in the Copper-Zinc alloy binary interface revealed by in situ transmission electron microscopy . | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 968 . |
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摘要 ：
A simple morphogenetic route has been developed to obtain free-standing lithium titanium phosphate (LiTi2(PO4)(3), LTP) with physical morphology resemble to a fabric. Commercial cotton textiles are used as templates by loading with aqueous solutions of corresponding precursors and then the cellulosic component is burned off in a furnace held at 600 degrees C. A well-crystallized centimeter-sized lithium titanium phosphate piece can then be synthesized with morphology similar to the fabric and high porosity. After uniformly coating the as-obtained lithium titanium phosphate network with amorphous carbon, the sample shows superior rate capability and cyclability in rechargeable lithium ion batteries. This method can be extendable for other templates and other titanium based electrode materials. (C) 2022 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
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| GB/T 7714 | Zhou, Xiao-Liang , Yan, Zheng-Guang , Ma, Lin et al. Carbon-Coated Porous LiTi2(PO4)(3) Network with Excellent Electrochemical Property via Replication of Cotton Fabric [J]. | JOURNAL OF THE ELECTROCHEMICAL SOCIETY , 2022 , 169 (8) . |
| MLA | Zhou, Xiao-Liang et al. "Carbon-Coated Porous LiTi2(PO4)(3) Network with Excellent Electrochemical Property via Replication of Cotton Fabric" . | JOURNAL OF THE ELECTROCHEMICAL SOCIETY 169 . 8 (2022) . |
| APA | Zhou, Xiao-Liang , Yan, Zheng-Guang , Ma, Lin , Xiao, Wei-Qiang , Han, Xiao-Dong . Carbon-Coated Porous LiTi2(PO4)(3) Network with Excellent Electrochemical Property via Replication of Cotton Fabric . | JOURNAL OF THE ELECTROCHEMICAL SOCIETY , 2022 , 169 (8) . |
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摘要 ：
Low-dimensional hybrid halide perovskite materials with self-trapped exciton (STE) emissions and anisotropic properties are highly attractive for their great potential in many applications. However, to date, reports on large one-dimensional (1D) perovskite single crystals have been limited. Here, centimeter-sized 1D single crystals of trimethylammonium lead iodide (TMAPbI(3)) with typical STE emission are synthesized by an antisolvent vapor-assisted crystallization method. Thermal quenching and antiquenching with a high relative sensitivity of photoluminescence (PL) are observed and studied via temperature-dependent photoluminescence spectroscopy. Further analysis indicates that the temperature-dependent PL behaviors are influenced by the self-trapping of the free exciton and the migrations between self-trapped excitons and intermediate nonradiative states. The TNIAPbI(3) single crystal also exhibits a linearly polarized emission and a large birefringence that is higher than those of commercial birefringent crystals. This 1D perovskite with high structural anisotropy has promise for applications in versatile optical- and luminescence-related fields.
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| GB/T 7714 | Du, Yiping , Yan, Zhengguang , Xiao, Jiawen et al. Temperature-Dependent Luminescence and Anisotropic Optical Properties of Centimeter-Sized One-Dimensional Perovskite Trimethylammonium Lead Iodide Single Crystals [J]. | JOURNAL OF PHYSICAL CHEMISTRY LETTERS , 2022 , 13 (24) : 5451-5460 . |
| MLA | Du, Yiping et al. "Temperature-Dependent Luminescence and Anisotropic Optical Properties of Centimeter-Sized One-Dimensional Perovskite Trimethylammonium Lead Iodide Single Crystals" . | JOURNAL OF PHYSICAL CHEMISTRY LETTERS 13 . 24 (2022) : 5451-5460 . |
| APA | Du, Yiping , Yan, Zhengguang , Xiao, Jiawen , Zhang, Guoqing , Ma, Yang , Li, Songyu et al. Temperature-Dependent Luminescence and Anisotropic Optical Properties of Centimeter-Sized One-Dimensional Perovskite Trimethylammonium Lead Iodide Single Crystals . | JOURNAL OF PHYSICAL CHEMISTRY LETTERS , 2022 , 13 (24) , 5451-5460 . |
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摘要 ：
本发明提供一种透射电镜用原位拉伸样品保护装置及其制备方法，包括设置在MEMS力学芯片上的第一搭载侧、第二搭载侧，还包括第一拉伸辅助件、第二拉伸辅助件和载物件；第一拉伸辅助件连接MEMS力学芯片的第一搭载侧，载物件两端分别连接第二拉伸辅助件和第二搭载侧；第一拉伸辅助件与第二拉伸辅助件相嵌套成勾套结构。本发明通过在MEMS力学芯片上搭载原料块，然后切割，得到第一拉伸辅助件、第二拉伸辅助件以及载物件，并且保证第一拉伸辅助件嵌套于第二拉伸辅助件内部，形成勾套结构，由于形成了载物件，使得整个勾套自由选材，可对一维、二维材料及块状材料拉伸；设置载物件，可有效防止样品在拉伸断裂后掉落，避免透射电镜被污染。
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| GB/T 7714 | 韩晓东 , 张家宝 , 张剑飞 et al. 透射电镜用原位拉伸样品保护装置及其制备方法 : CN202210674942.2[P]. | 2022-06-14 . |
| MLA | 韩晓东 et al. "透射电镜用原位拉伸样品保护装置及其制备方法" : CN202210674942.2. | 2022-06-14 . |
| APA | 韩晓东 , 张家宝 , 张剑飞 , 毛圣成 , 李志鹏 . 透射电镜用原位拉伸样品保护装置及其制备方法 : CN202210674942.2. | 2022-06-14 . |
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摘要 ：
Metals usually have three crystal structures: face-centered cubic (fcc), body-centered cubic (bcc), and hexagonal-close packed (hcp) structures. Typically, metals exhibit only one of these structures at room temperature. Mechanical processing can cause phase transition in metals, however, metals that exhibit all the three crystal structures have rarely been approached, even when hydrostatic pressure or shock conditions are applied. Here, through in situ observation of the atomic-scale bending and tensile process of similar to 5 nm-sized Ag nanowires (NWs), we show that bending is an effective method to facilitate fcc-structured Ag to access all the above-mentioned structures. The process of transitioning the fcc structure into a bcc structure, then into an hcp structure, and finally into a re-oriented fcc structure under bending has been witnessed in its entirety. This re-oriented fcc structure is twin-related to the matrix, which leads to twin nucleation without the need for partial dislocation activities. The results of this study advance our understanding of the deformation mechanism of small-sized fcc metals.
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| GB/T 7714 | Sun, Shiduo , Li, Dongwei , Yang, Chenpeng et al. Direct Atomic-Scale Observation of Ultrasmall Ag Nanowires that Exhibit fcc, bcc, and hcp Structures under Bending [J]. | PHYSICAL REVIEW LETTERS , 2022 , 128 (1) . |
| MLA | Sun, Shiduo et al. "Direct Atomic-Scale Observation of Ultrasmall Ag Nanowires that Exhibit fcc, bcc, and hcp Structures under Bending" . | PHYSICAL REVIEW LETTERS 128 . 1 (2022) . |
| APA | Sun, Shiduo , Li, Dongwei , Yang, Chenpeng , Fu, Libo , Kong, Deli , Lu, Yan et al. Direct Atomic-Scale Observation of Ultrasmall Ag Nanowires that Exhibit fcc, bcc, and hcp Structures under Bending . | PHYSICAL REVIEW LETTERS , 2022 , 128 (1) . |
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摘要 ：
本发明提供一种Mn掺杂Cs2CdCl4闪烁体。所述Mn掺杂Cs2CdCl4闪烁体以Cs2CO3、CdCl2、MnCl2为原料经溶液法搅拌后再加热制得。本发明方法制备的Mn掺杂Cs2CdCl4(Cs2CdCl4：Mn)的纯度高，且工艺简单、制备成本低、适于大批量制备生产。
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| GB/T 7714 | 严铮洸 , 王超 , 肖家文 et al. Mn掺杂Cs2CdCl4闪烁体 : CN202211714911.1[P]. | 2022-12-29 . |
| MLA | 严铮洸 et al. "Mn掺杂Cs2CdCl4闪烁体" : CN202211714911.1. | 2022-12-29 . |
| APA | 严铮洸 , 王超 , 肖家文 , 韩晓东 , 王颖 . Mn掺杂Cs2CdCl4闪烁体 : CN202211714911.1. | 2022-12-29 . |
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摘要 ：
本发明涉及高熵合金领域，具体涉及一种高温下兼具优秀力学性能和抗氧化的高熵合金及制备方法。所述高熵合金的化学式记为(HfNbTiV)100‑xAlx，其中X＝0～10。本发明的高熵合金在室温及高温下兼具高拉伸屈服强度、高拉伸塑性和抗氧化的优秀性能。当所述高熵合金中含有Al时，高熵合金在室温及高温下兼具高拉伸屈服强度、高拉伸塑性、抗氧化和低密度的优秀性能。其在航空航天，国防军事等重大领域具有较大的应用潜力。
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| GB/T 7714 | 毛圣成 , 安子冰 , 韩晓东 et al. 高温下兼具优秀力学性能和抗氧化的高熵合金及制备方法 : CN202210406782.3[P]. | 2022-04-18 . |
| MLA | 毛圣成 et al. "高温下兼具优秀力学性能和抗氧化的高熵合金及制备方法" : CN202210406782.3. | 2022-04-18 . |
| APA | 毛圣成 , 安子冰 , 韩晓东 , 张泽 . 高温下兼具优秀力学性能和抗氧化的高熵合金及制备方法 : CN202210406782.3. | 2022-04-18 . |
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