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学者姓名：聂祚仁
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Abstract ：
The phase structure, grain refinement, and microalloying effect of the Al-5Er-Ti master alloy were analyzed by a refining experiment, microhardness test, OM, SEM, and XRD. The results show that when the Er/Ti atomic ratio is 2.7, the refining effect of the Al-5Er-0.5Ti master alloy is significantly better than Al-5Er, which is due to the Ti2Al20Er phase. There are three crystal orientations of Ti2Al20Er and alpha-Al that satisfy the E2E model, among which (620)Ti2Al20Er<260>Ti2Al20Er//(111)Al<110>Al is the least mismatched one. When the Er/Ti atomic ratio is reduced to below 1.3, the Ti-containing phase of the Al-5Er-Ti master alloy is composed of Ti2Al20Er and Al3Ti. The primary phase size of the Al-5Er-1.5Ti master alloy decreases with the increase in cooling rate, and the grain refining effect improved more significantly. The optimum size of the Ti2Al20Er phase and Al3Ti phase is 6.0 mu m and 9.5 mu m, respectively. The grain size of pure aluminum is reduced from 14,000 mu m to 300 mu m by Al-5Er-1.5Ti master alloy refinement, and the refinement rate is 97.9%. Direct aging of the refined sample did not have a precipitation strengthening effect. After the solution and aging treatment, the peak aging of the refined sample was reached in 15 min, and the microhardness increased by 41%.
Keyword ：
microalloying microalloying Ti2Al20Er Ti2Al20Er Al3Ti Al3Ti grain refinement grain refinement Al alloy Al alloy
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| GB/T 7714 | Ma, Jingrui , Lei, Zhiguo , Wen, Shengping et al. Al-5Er-Ti Master Alloy with Both Grain Refinement and Microalloying Effects [J]. | METALS , 2025 , 15 (1) . |
| MLA | Ma, Jingrui et al. "Al-5Er-Ti Master Alloy with Both Grain Refinement and Microalloying Effects" . | METALS 15 . 1 (2025) . |
| APA | Ma, Jingrui , Lei, Zhiguo , Wen, Shengping , Yang, Guang , Wei, Wu , Huang, Hui et al. Al-5Er-Ti Master Alloy with Both Grain Refinement and Microalloying Effects . | METALS , 2025 , 15 (1) . |
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Abstract ：
Thermodynamic calculations were carried out on typical tungsten cathode materials using Factsage software within a temperature range of 1000-3400 degrees C. The relationship between the phase stability and electron emission performance of the cathode in a vacuum environment and under a protective atmosphere was investigated. The thermodynamic stability of tungsten cathodes doped with different proportions of carbides and oxides was calculated. It was found that when the doped phase (ThO2, La2O3, Y2O3, Lu2O3, Er2O3, Gd2O3, TiO2, ZrO2, HfO2, ThC2, LaC2, YC2, TiC, ZrC, and HfC) in the cathode starts to be consumed, the electron emission performance of the cathode will decline. Therefore, the high-temperature stability of the doped phase carbides and oxides also affects the operating temperature of the cathode. To verify these results, this study tested the electron emission performance of W-La2O3, W-ThO2, W-ZrO2, W-ZrC, and W-HfC, plotting their volt-ampere characteristic curves. The results indicated that the W-La2O3 cathode exhibits the best emission performance at low temperatures, while the W-ThO2, W-ZrO2, W-ZrC, and W-HfC cathodes showed better emission performance at high temperatures. The experimental results are in good agreement with the simulation results. The thermal stability of the doped phase is closely related to the high-temperature thermal stability of the cathode.
Keyword ：
electron emission electron emission tungsten cathodes tungsten cathodes thermal stability thermal stability
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| GB/T 7714 | Wang, Jiaxuan , Yang, Jiancan , Zhang, Po et al. Thermal Stability Calculation of Typical Phases in Tungsten Cathodes [J]. | METALS , 2025 , 15 (3) . |
| MLA | Wang, Jiaxuan et al. "Thermal Stability Calculation of Typical Phases in Tungsten Cathodes" . | METALS 15 . 3 (2025) . |
| APA | Wang, Jiaxuan , Yang, Jiancan , Zhang, Po , Nie, Zuoren . Thermal Stability Calculation of Typical Phases in Tungsten Cathodes . | METALS , 2025 , 15 (3) . |
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Abstract ：
In this study, high-strength Al-8.5Mg-0.78Mn-0.96Er-1.94Zr alloys are prepared by selective laser melting(SLM). The microstructure and mechanical properties of the Al-Mg-Mn-Er-Zr alloys in the as-built and heat-treated states are investigated. The results show that Al-3(Er,Zr) primary phases with L1(2) structure (<= 200 nm) formed during the SLM process. These phases act as heterogeneous nucleation sites and promote the formation of ultrafine equiaxial grains (0.3-0.85 mu m) at the melt pool boundary. It inhibits the epitaxial growth of columnar grains, and equiaxial grains (2-6.45 mu m) are formed in the melt pool center. Er and Zr have significant refining effects on the alloy, forming a nearly fully equiaxed grain structure. After the aging treatment, a large number of Al-3(Er,Zr) precipitation phases with sizes of 2 similar to 5 nm is diffusely precipitated, which promotes the precipitation strengthening. The tensile strength of the as-build sample is 521 MPa, the yield strength is 446 MPa, and the elongation is 14%. After the aging treatment, the yield strength increased, and the elongation decreased. Er/Zr-modified SLMed Al-Mg-Mn alloy can improve alloy properties, reduce costs, expand applications, and provide theoretical support for alloy design and processing.
Keyword ：
Mechanical properties Mechanical properties Ultrafine equiaxial grains Ultrafine equiaxial grains Selective laser melting Selective laser melting Er/Zr addition Er/Zr addition
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| GB/T 7714 | Wei, Wu , Zhai, Yuyan , Hu, Jifei et al. Approaching fully equiaxial grains of Er/Zr modified selective laser melted Al-Mg-Mn alloys [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2025 , 35 : 6147-6155 . |
| MLA | Wei, Wu et al. "Approaching fully equiaxial grains of Er/Zr modified selective laser melted Al-Mg-Mn alloys" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 35 (2025) : 6147-6155 . |
| APA | Wei, Wu , Zhai, Yuyan , Hu, Jifei , Bi, Jianlei , Gao, Zhengjiang , Yang, Jiaoxi et al. Approaching fully equiaxial grains of Er/Zr modified selective laser melted Al-Mg-Mn alloys . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2025 , 35 , 6147-6155 . |
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Abstract ：
In this investigation, a Si-containing Al-Zn-Mg-Cu alloy with good thermal stability caused by metastable GPB-II phases was found. This metastable GPB-II phase will finally transform into the L phase at 175 degrees C. In comparison to the Si-free alloy that underwent peak aging at 175 degrees C, the tensile strength, yield strength and elongation of the alloy with the addition of 0.35 wt% Si exhibited an increase of 75 MPa (24.9 %), 88 MPa (37.8 %) and 3.1 % (41.8 %), respectively. Furthermore, the yield strength and microhardness of the alloy with a Si content exceeding 0.35 wt% exhibited minimal decline during over-aging at 175 degrees C for 96 hand 160 degrees C for 500 h. It was observed that the number density of the eta and T phases at the peak aging state decreased, and the average size doubled when 0.2 wt% Si was added. And with further addition of Si, the eta and T phases are no longer present within the alloy, with only the more stable, fine, and uniform GPB-II phase remaining. Transmission electron microscope (TEM) observations indicate that the average size of the GPB-II phase remains unchanged with prolonged aging at 175 degrees C, which provides a rationale for the alloy's well thermal stability. From the perspective of cluster formation, we put forth a three-stage growth model to explain the formation and evolution of the GPBII core-shell structure. In comparison, the thermal stability of the GPB-II phase is markedly superior to that of the L phase, predominantly as a consequence of the influence of the Guinier-Preston-Bagaryatsky (GPB) zone (Cu or Zn segregate) growth in the periphery of the L phase.
Keyword ：
Nucleation and growth model Nucleation and growth model Thermal stability Thermal stability GPB-II phase GPB-II phase Al-Zn-Mg-Cu-Si alloy Al-Zn-Mg-Cu-Si alloy L phase L phase
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| GB/T 7714 | Lu, Yi , Wen, Shengping , Wei, Wu et al. High thermal stability of Si-containing Al-Zn-Mg-Cu crossover alloy caused by metastable GPB-II phase [J]. | MATERIALS CHARACTERIZATION , 2025 , 223 . |
| MLA | Lu, Yi et al. "High thermal stability of Si-containing Al-Zn-Mg-Cu crossover alloy caused by metastable GPB-II phase" . | MATERIALS CHARACTERIZATION 223 (2025) . |
| APA | Lu, Yi , Wen, Shengping , Wei, Wu , Wu, Xiaolan , Gao, Kunyuan , Huang, Hui et al. High thermal stability of Si-containing Al-Zn-Mg-Cu crossover alloy caused by metastable GPB-II phase . | MATERIALS CHARACTERIZATION , 2025 , 223 . |
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Abstract ：
以Al-30Zn-3Cu-2.5Si高锌铝基合金为研究对象，探究稀土元素Er、Zr对铸态及热处理态合金组织和力学性能的影响，并分析和探讨了其作用机理。结果表明，当添加0.10%(质量分数，下同) Er和0.10%Zr元素后能够明显地细化合金晶粒，平均晶粒尺寸由74.28μm减小至60.01μm，且α-Al晶粒转变为细小的等轴晶。稀土元素Er、Zr的添加会在合金内部形成Al3(Er,Zr)细小的粒子并能够起到钉扎位错的作用，从而提高合金的力学性能。添加Er、Zr后，铸态合金的抗拉强度由未添加稀土元素的323.01 MPa提高到了358.29 MPa，提升了10.93%；屈服强度由309.33 MPa提高到了315.00MPa，提升了1.83%；延伸率基本未发生变化。合金经固溶时效热处理强化后，添加稀土元素合金的抗拉强度为449.48 MPa，屈服强度为408.51 MPa，比铸态合金分别提高了25.45%、29.68%。粗大的第二相存在于晶界处，导致合金的延伸率仍较差。
Keyword ：
热处理 热处理 稀土元素 稀土元素 力学性能 力学性能 高锌铝合金 高锌铝合金 组织 组织
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| GB/T 7714 | 王潇博 , 荣莉 , 黄晖 et al. Er、Zr及热处理对高锌铝合金组织和力学性能的影响 [J]. | 稀有金属材料与工程 , 2024 , 53 (01) : 250-256 . |
| MLA | 王潇博 et al. "Er、Zr及热处理对高锌铝合金组织和力学性能的影响" . | 稀有金属材料与工程 53 . 01 (2024) : 250-256 . |
| APA | 王潇博 , 荣莉 , 黄晖 , 魏午 , 高倩 , 王泽忠 et al. Er、Zr及热处理对高锌铝合金组织和力学性能的影响 . | 稀有金属材料与工程 , 2024 , 53 (01) , 250-256 . |
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Abstract ：
采用SEM、EDS等手段研究了铝侧添加Sc元素对Al/Fe复合界面金属间化合物的生长、种类及组织形貌的影响.结果表明,冷轧复合的Al/Fe复合板在475～640℃退火1 h后均产生了连续的界面化合物,在560℃及以下时,金属间化合物厚度变化趋势基本一致,在560 ℃以上时,含Sc的复合板界面金属间化合物增长趋势明显变缓,厚度大幅降低,这表明Al侧添加Sc元素不能完全抑制界面金属间化合物的产生.同时,Sc元素的添加并未改变界面化合物的种类及分布,界面化合物从Al侧到Fe侧依次为FeAl3、Fe2Al5、FeAl.在475℃时,Fe侧Fe2Al5相呈细小的锯齿状形貌,但整体十分平整,在580℃时,Fe侧Fe2Al5相呈粗大"指状"形貌,起伏较大.
Keyword ：
微合金化 微合金化 金属间化合物 金属间化合物 铝/铁复合 铝/铁复合
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| GB/T 7714 | 王振 , 高坤元 , 张小军 et al. Sc对Al/Fe层状复合材料界面化合物生长行为的影响 [J]. | 金属热处理 , 2024 , 49 (1) : 84-90 . |
| MLA | 王振 et al. "Sc对Al/Fe层状复合材料界面化合物生长行为的影响" . | 金属热处理 49 . 1 (2024) : 84-90 . |
| APA | 王振 , 高坤元 , 张小军 , 聂祚仁 , 黄晖 , 吴晓蓝 . Sc对Al/Fe层状复合材料界面化合物生长行为的影响 . | 金属热处理 , 2024 , 49 (1) , 84-90 . |
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Abstract ：
近年来增材制造铝合金技术得到迅速发展，尤其是激光粉末床融合技术(LPBF)在部分构件上实现了应用验证。在LPBF技术中，常通过添加微量元素，如稀土铒(Er)元素等，来改善合金的成形性和力学性能。本研究从Er在铝合金中的作用机理出发，系统性概述Er元素在LPBF特殊热环境中的演变机制以及时效响应。总结在LPBF工艺下，Er元素在Al-Si、Al-Mg和Al-Zn-Mg-Cu合金中的存在形式和应用，对比不同含铒铝合金的力学性能，并对LPBF含铒铝合金的发展进行了展望。
Keyword ：
Zr Zr 微合金化 微合金化 Er Er 激光粉末床融合技术 激光粉末床融合技术 铝合金 铝合金
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| GB/T 7714 | 毕舰镭 , 魏午 , 翟玉妍 et al. 激光粉末床融合含铒铝合金研究进展 [J]. | 材料开发与应用 , 2024 , 39 (01) : 94-104 . |
| MLA | 毕舰镭 et al. "激光粉末床融合含铒铝合金研究进展" . | 材料开发与应用 39 . 01 (2024) : 94-104 . |
| APA | 毕舰镭 , 魏午 , 翟玉妍 , 裴瑜 , 文胜平 , 荣莉 et al. 激光粉末床融合含铒铝合金研究进展 . | 材料开发与应用 , 2024 , 39 (01) , 94-104 . |
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Abstract ：
将过共晶AlSc15 合金加热至液态,以10℃/h速率冷却得到毫米级尺寸的Al3 Sc金属间化合物.利用微区电化学和扫描开尔文探针力显微镜(SKPFM)研究了Al3 Sc金属间化合物在不同pH值的 0.1 mol/L NaCl溶液中的电化学特征及对局部腐蚀敏感性的影响.结果表明,Al3 Sc金属间化合物存在自钝化现象,且在碱性环境中有明显的维钝区域;随着pH值的增加,Al3 Sc腐蚀电位逐渐降低,在中性和碱性条件下的腐蚀速率明显低于酸性条件下的;Al3 Sc金属间化合物与周围铝基体之间的伏打电位差约为40 mV,在铝合金中可能作为较弱的局部阴极,对电偶腐蚀的影响不大.
Keyword ：
局部腐蚀 局部腐蚀 扫描开尔文 扫描开尔文 Al3Sc金属间化合物 Al3Sc金属间化合物 微电化学技术 微电化学技术
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| GB/T 7714 | 蒋伟 , 高坤元 , 胡秀华 et al. AlSc15中间合金中Al3Sc金属间化合物的电化学行为及对局部腐蚀的影响 [J]. | 轻合金加工技术 , 2024 , 52 (2) : 54-58 . |
| MLA | 蒋伟 et al. "AlSc15中间合金中Al3Sc金属间化合物的电化学行为及对局部腐蚀的影响" . | 轻合金加工技术 52 . 2 (2024) : 54-58 . |
| APA | 蒋伟 , 高坤元 , 胡秀华 , 文胜平 , 黄晖 , 吴晓蓝 et al. AlSc15中间合金中Al3Sc金属间化合物的电化学行为及对局部腐蚀的影响 . | 轻合金加工技术 , 2024 , 52 (2) , 54-58 . |
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Abstract ：
The GPB-II zone is the main strengthening precipitate in the Al-4.5Zn-1.5Mg-1.0Cu-0.35Si (wt.%) crossover alloy, resulting in increased alloy strength and ductility. The atomic structure of the GPB-II zone and its evolution process during aging have been studied by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) in the present work. It is shown that the GPB-II zone is a hybrid precipitate consisting of the L phase (a disordered phase with a QP lattice and is normally present in Al-Mg-Si-Cu alloy) on the inner part and Guinier-Preston-Bagaryatsky (GPB) zones (an important strengthening phase in Al-Cu-Mg alloy) on the outer part. The GPB-II zone is formed by the GPB zone nucleating at the Cu site (in-between and on the Sinetwork) of the L phase. The unique combination of the GPB zone and L phase was investigated, and the "Si parallelogram embedding with Cu" was proposed. The GPB zone provides the atoms for the L phase's growth and results in the coarsening of the L phase with few GPB zones after a long aging time. The role of the Zn element in the formation of the GPB-II zone was discussed. It is thought to have a similar effect as Cu and can also promote the formation of GPB zones on the L phase.
Keyword ：
Al-Zn-Mg-Cu-Si alloys Al-Zn-Mg-Cu-Si alloys HAADF-STEM HAADF-STEM Hybrid precipitate Hybrid precipitate Atomic structure Atomic structure Crossover alloy Crossover alloy
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| GB/T 7714 | Guo, Kehong , Liang, Shangshang , Wen, Shengping et al. Atomic structure of GPB-II zone and its evolution in an Al-Zn-Mg-Cu-Si crossover alloy during aging [J]. | MATERIALS CHARACTERIZATION , 2024 , 215 . |
| MLA | Guo, Kehong et al. "Atomic structure of GPB-II zone and its evolution in an Al-Zn-Mg-Cu-Si crossover alloy during aging" . | MATERIALS CHARACTERIZATION 215 (2024) . |
| APA | Guo, Kehong , Liang, Shangshang , Wen, Shengping , Wei, Wu , Wu, Xiaolan , Gao, Kunyuan et al. Atomic structure of GPB-II zone and its evolution in an Al-Zn-Mg-Cu-Si crossover alloy during aging . | MATERIALS CHARACTERIZATION , 2024 , 215 . |
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Abstract ：
Between the inherent difficulties associated with high temperature experiments and the inherent complexity of multi-component liquid phase systems, a Grotthuss-like transport mechanism for WO3 in molten Na2WO4 has been discovered and investigated in order to deepen the understanding of the properties of the Na2WO4-WO3 molten salt and to broaden its applications in areas such as electroplating, catalysis and energy. The research on the Grotthuss-like transport mechanism of WO3 in molten Na2WO4 shows that the mass transfer rate of this mechanism is about 1.5 times faster than the self-diffusion of tungsten ions. The bridging oxygen bond of W2O72is longer, the Mayer bond level is lower and has a smaller ELF than that of the non-bridging oxygen bond, which makes the bridging oxygen bond more susceptible to breakage. The total energy, Pauli mutual repulsion energy and orbital interaction energy of the non-bridging oxygen bond are larger than those of the bridging oxygen bond. The transition state of the W2O72- dissociation process is the torsion of the bridging oxygen bond with a potential barrier of 42.903 kJ/mol.
Keyword ：
Na2WO4-WO3 molten salt Na2WO4-WO3 molten salt Grotthuss transport Grotthuss transport First-principles molecular dynamics First-principles molecular dynamics
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| GB/T 7714 | Wang, Xinda , Zhang, Liwen , Ma, Liwen et al. First principles modeling of WO3 transport in molten Na2WO4 via a grotthuss-like mechanism and the kinetic characterization involved [J]. | JOURNAL OF MOLECULAR LIQUIDS , 2024 , 412 . |
| MLA | Wang, Xinda et al. "First principles modeling of WO3 transport in molten Na2WO4 via a grotthuss-like mechanism and the kinetic characterization involved" . | JOURNAL OF MOLECULAR LIQUIDS 412 (2024) . |
| APA | Wang, Xinda , Zhang, Liwen , Ma, Liwen , Xi, Xiaoli , Nie, Zuoren . First principles modeling of WO3 transport in molten Na2WO4 via a grotthuss-like mechanism and the kinetic characterization involved . | JOURNAL OF MOLECULAR LIQUIDS , 2024 , 412 . |
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