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学者姓名：周正
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Abstract ：
The outstanding high-strength of high-entropy alloys (HEAs) depends on a synergistic effect of various strengthened methods, such as precipitation strengthening. However, the precipitates hamper the corrosion resistance by common understanding, leading to a reduced ability of these precipitation strengthened HEAs to withstand complex environments. In this work, we proposed a boron-doping strategy to regulate the conflict between mechanical properties and corrosion resistance in an equiatomic FeCrNiCoMn HEA, and revealed the role of boron in microstructure and properties. As expected, as the boron-doping content raised from 1 to 4 at%, the strengths gradually enhanced, due to the strengthening effect of boride precipitates at grain boundaries in addition to grain refinement. Particularly, the yield strength (YS) increased twice compared to that of boron-free reference alloy, reaching similar to 425 MPa. Different from the conventional experience in the effect of precipitates, the addition of boron led to the decreases in both corrosion potential (E-corr) and current density (I-corr) values in 3.5 wt% NaCl solution. Among these HEAs, the FeCrNiCoMn HEA with 1 at% boron doping exhibited the best corrosion resistance, which was attributed to the competition between grain refinement and boride precipitation. The proper boron doping led to pronounced grain refinement by more than 20 %, which promoted the rapid formation of a less defective and more stable passive film, thus prevailing over the detrimental effect of boride precipitates by inducing Cr-depleted zones. Therefore, the strength and corrosion resistance of the FeCrNiCoMn HEA were simultaneously improved by doping 1 at% boron. The present results demonstrate an effective strategy to regulate the balanced properties of precipitation strengthened HEAs and provide an inspiration for future works aiming to develop these materials with adequate suitability in various applications.
Keyword ：
Corrosion resistance Corrosion resistance Boron doping Boron doping Mechanical property Mechanical property High-entropy alloys High-entropy alloys
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| GB/T 7714 | Yao, Haihua , Yang, Xiaokai , Zhao, Wanxin et al. Regulating corrosion resistance of precipitation strengthened FeCoNiCrMn high-entropy alloy using boron doping [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2025 , 1022 . |
| MLA | Yao, Haihua et al. "Regulating corrosion resistance of precipitation strengthened FeCoNiCrMn high-entropy alloy using boron doping" . | JOURNAL OF ALLOYS AND COMPOUNDS 1022 (2025) . |
| APA | Yao, Haihua , Yang, Xiaokai , Zhao, Wanxin , Zhang, Shuo , Yang, Yange , Zhao, Yu et al. Regulating corrosion resistance of precipitation strengthened FeCoNiCrMn high-entropy alloy using boron doping . | JOURNAL OF ALLOYS AND COMPOUNDS , 2025 , 1022 . |
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Abstract ：
The laser powder bed fusion (LPBF) manufactured CoCrFeMnNi high-entropy alloy (HEA) presents potential application at cryogenic temperatures, except for a relatively low yield strength (sigma y). In this work, we proposed an oversaturated boron-doping strategy to overcome this insufficiency. Compared to the boron-free and high boron-doping references, the moderate boron-doping LPBF HEA exhibits high strength at temperatures of 77 and 298 K, while maintains favourable ductility, corresponding to a sigma y of 806 MPa with a total elongation (& varepsilon;) of similar to 20% at 298 K, and a sigma y of 1072 MPa with a & varepsilon; of similar to 12% at 77 K, respectively. The improved mechanical properties are attributed to the microstructures composed of refined grains, reduced cell size, oversaturation of boron and the formation of nano-sized Cr2B precipitates at cell boundaries. The grain boundary strengthening, precipitation strengthening, solid solution strengthening and dislocation strengthening contribute to the high sigma y. The interactions between dislocation slip and deformation twins with boride precipitates account for the enhanced strain hardening and favourable plasticity at 77 K. The results demonstrate an effective strategy to establish balanced mechanical properties of LPBF HEA, and provide an inspiration for future works aiming to develop high-performance structural materials over a wide temperature range.
Keyword ：
LPBF LPBF boron doping boron doping tensile behaviour tensile behaviour microstructure microstructure High-entropy alloys High-entropy alloys
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| GB/T 7714 | Zhang, Ruize , Yao, Haihua , Lin, Xin et al. Regulating mechanical properties of laser powder bed fusion manufactured CoCrFeMnNi high-entropy alloy using oversaturated boron doping [J]. | VIRTUAL AND PHYSICAL PROTOTYPING , 2025 , 20 (1) . |
| MLA | Zhang, Ruize et al. "Regulating mechanical properties of laser powder bed fusion manufactured CoCrFeMnNi high-entropy alloy using oversaturated boron doping" . | VIRTUAL AND PHYSICAL PROTOTYPING 20 . 1 (2025) . |
| APA | Zhang, Ruize , Yao, Haihua , Lin, Xin , Gao, Jiahui , Guo, Zhuofei , Gong, Jiaxin et al. Regulating mechanical properties of laser powder bed fusion manufactured CoCrFeMnNi high-entropy alloy using oversaturated boron doping . | VIRTUAL AND PHYSICAL PROTOTYPING , 2025 , 20 (1) . |
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Abstract ：
Fe-based amorphous coating attracted great interest in a novel thermal barrier application for the design of advanced vehicle engines, especially when modified by ceramic addition. In this work, we focused on the ceramic content of a previously developed FeCrNbBSi/YSZ composite coating to tailor the thermal insulation and mechanical properties. The composite coatings synthesized by atmospheric plasma spraying (APS) comprise of well-formed amorphous matrix and dispersed YSZ splats. A nanoscale and amorphous interfacial layer forms between the metallic and ceramic splats due to the separate melt and rapid solidification of sprayed particles. Increasing YSZ additions significantly improve the thermal insulation ability of the composite coatings, granting the FN-30Y (FeCrNbBSi-30%YSZ) coating an extremely low thermal conductivity of 2.72 W/(m center dot K) at 600 degrees C, whose underlining mechanism is revealed as the suppression of electron thermal conductivity and the contribution of interfacial thermal resistance. Benefited from the formation of nanoscale interfacial layer to alleviate interfacial flaws, the moderate YSZ additions only induce a limited sacrifice of the fracture toughness, rendering the FN-20Y (FeCrNbBSi-20%YSZ) coating to maintain a high value of 3.40 MPa center dot m1/2, but excessive additions dramatically hamper the mechanical property of composite coating. The present results emphasize the importance of establishing balanced properties of Fe-based amorphous composite coating for thermal barrier application and provide an inspiration for future works aiming to tailor the performance of extensive metal-matrix composite coatings.
Keyword ：
Ceramic addition Ceramic addition Thermal conductivity Thermal conductivity Interfacial layer Interfacial layer Fe-based amorphous coating Fe-based amorphous coating Fracture toughness Fracture toughness
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| GB/T 7714 | Xu, Fengfeng , Yao, Haihua , Wang, Xiangzhao et al. Tailoring the thermal insulation and mechanical properties of Fe-based amorphous composite coating by YSZ addition [J]. | SURFACE & COATINGS TECHNOLOGY , 2025 , 498 . |
| MLA | Xu, Fengfeng et al. "Tailoring the thermal insulation and mechanical properties of Fe-based amorphous composite coating by YSZ addition" . | SURFACE & COATINGS TECHNOLOGY 498 (2025) . |
| APA | Xu, Fengfeng , Yao, Haihua , Wang, Xiangzhao , Li, Yanze , Yang, Yange , Zhao, Yu et al. Tailoring the thermal insulation and mechanical properties of Fe-based amorphous composite coating by YSZ addition . | SURFACE & COATINGS TECHNOLOGY , 2025 , 498 . |
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Abstract ：
本发明公开了一种竹笋结构W‑Zr基非晶合金复合材料及其制备方法与应用，涉及金属复合材料技术领域，复合材料的整体结构上分别存在硬脆区和软韧区，其中硬脆区体积分数为10％～30％，软韧区体积分数为70％～90％，两区域呈锥形交替分布，其分布为仿生竹笋结构，这种竹笋结构的优势在于：在高应变速率条件下，软韧区先发生变形，随着变形程度增加，软韧区与硬脆区同时变形，随后硬脆区开裂，沿着设计结构方式分离脱落，重新露出尖锐区域完成自锐化，类似竹笋剥落；循环此步骤，完成侵彻过程，可显著增加穿甲弹威力。
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| GB/T 7714 | 谈震 , 席钊 , 宁子阳 et al. 一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用 : CN202310055654.3[P]. | 2023-01-17 . |
| MLA | 谈震 et al. "一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用" : CN202310055654.3. | 2023-01-17 . |
| APA | 谈震 , 席钊 , 宁子阳 , 贺定勇 , 周正 , 郭星晔 et al. 一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用 : CN202310055654.3. | 2023-01-17 . |
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Abstract ：
本发明涉及一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法，涉及增材制造技术及微通道散热技术领域。本发明利用激光增材制造技术，按照所设计微通道结构的模型进行切片处理、区域划分及激光扫描策略规划，通过不同区域的激光工艺参数、激光扫描策略与钨铜粉末比例匹配，一体成形制备出具有钨骨架结构的钨铜复合材料微通道散热器，随后对微通道进行磨粒流抛光后处理，使微通道具有适宜的内表面粗糙度。所制备的微通道散热器散热性能优良，热膨胀系数能与电子元件的基体材料相匹配，钨骨架显著改善散热器高温性能并实现结构功能一体化，为微电子领域提供更有效率、成本更低的散热解决方案。
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| GB/T 7714 | 贺定勇 , 李小璇 , 谈震 et al. 一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法 : CN202310249027.3[P]. | 2023-03-15 . |
| MLA | 贺定勇 et al. "一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法" : CN202310249027.3. | 2023-03-15 . |
| APA | 贺定勇 , 李小璇 , 谈震 , 郭星晔 , 邵蔚 , 周正 et al. 一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法 : CN202310249027.3. | 2023-03-15 . |
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Abstract ：
The Mo-10Si-(0, 5, 10, 15)B (at.%) alloys located in Moss (Mo solid solution) +Mo3Si +T2 (Mo5SiB2) region were prepared by arc melting. The effect of B content on the microstructure, microhardness, fracture toughness and oxidation resistance of the alloys was studied. In the Mo-10Si alloy, there are primary Mo-ss and peritectic Mo3Si phases. With the addition of B, (Mo-ss + T2) binary and (Mo-ss + T2 + Mo3Si) ternary eutectics emerge in Mo-10Si-(5, 10)B alloys. For Mo-10Si-15B alloy, primary Moss disappears and the mi-crostructure is only composed of binary and ternary eutectics. With the increase of B content, the proportion and grain size of Mo-ss decrease. The microhardness of alloys increases with the increase of B content due to the increasing intermetallics. The fracture toughness of alloys decreases obviously in single-edge notched three-point bending testing (SENB) and the fracture mode transforms from transgranular fracture to intergranular fracture because of the refinement of Mo-ss. In the high-temperature oxidation test at 1250 degrees C, the oxidation weight loss of the alloys decreases with the addition of B due to the densification of the borosilicate layer. (C) 2021 Elsevier B.V. All rights reserved.
Keyword ：
Microstructure Microstructure Oxidation resistance Oxidation resistance B content B content Mo-Si-B alloys Mo-Si-B alloys Fracture toughness Fracture toughness
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| GB/T 7714 | Jin, Ming , He, Dingyong , Shao, Wei et al. Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 890 . |
| MLA | Jin, Ming et al. "Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys" . | JOURNAL OF ALLOYS AND COMPOUNDS 890 (2022) . |
| APA | Jin, Ming , He, Dingyong , Shao, Wei , Tan, Zhen , Guo, Xingye , Zhou, Zheng et al. Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 890 . |
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Abstract ：
开发了三种不同结构的Ni-20Al丝材,对其火焰喷涂工艺性和涂层微结构特征等进行分析,并与商用Metco 405NS丝材及所制备的涂层进行了对比.结果表明,丝材结构影响了火焰加热时热量由丝材表面向芯部的传导,导致丝材熔化状态产生显著差异,进而决定了喷涂焰流的稳定性以及相关涂层组织的均匀性.其中,采用轧制拉拔包丝技术制备的Ni-20Al丝材,呈现出优异的喷涂工艺稳定性,所制备的涂层组织均匀,平均显微硬度和结合强度分别可达348.3 HV0.05、62 MPa,与405NS丝材制备涂层性能基本一致,具备了较好的应用潜力.
Keyword ：
微观组织结构 微观组织结构 Ni-20Al丝材 Ni-20Al丝材 火焰喷涂 火焰喷涂
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| GB/T 7714 | 路洋 , 闫泽 , 周正 et al. Ni-20Al丝材制备及涂层微结构特征研究 [J]. | 热喷涂技术 , 2022 , 14 (3) : 64-73 . |
| MLA | 路洋 et al. "Ni-20Al丝材制备及涂层微结构特征研究" . | 热喷涂技术 14 . 3 (2022) : 64-73 . |
| APA | 路洋 , 闫泽 , 周正 , 王彦军 , 苗小锋 , 冀晓鹃 et al. Ni-20Al丝材制备及涂层微结构特征研究 . | 热喷涂技术 , 2022 , 14 (3) , 64-73 . |
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Abstract ：
本发明涉及电热材料技术领域，尤其涉及一种用于热控涂层的高熵合金材料和涂层及其制备方法。所述用于热控涂层的高熵合金材料按质量百分含量计包含以下成分：镍15～20％，钴13～20％，铬13～18％，锰13～20％，非金属元素0.05～2％，铁为余量；其中，所述非金属元素为硼和/或硅。本发明通过添加一定用量及组合的非金属元素(Si、B)及镍、钴、铬、锰和铁的配合，并在本发明涂层制备工艺条件下，能够更好地实现降低氧化物含量和提高涂层硬度的同时大幅提高电阻率的目的，进一步显著提高金属热控涂层的加热效率。
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| GB/T 7714 | 周正 , 杨小锴 , 姚海华 et al. 一种用于热控涂层的高熵合金材料和涂层及其制备方法 : CN202211288455.9[P]. | 2022-10-20 . |
| MLA | 周正 et al. "一种用于热控涂层的高熵合金材料和涂层及其制备方法" : CN202211288455.9. | 2022-10-20 . |
| APA | 周正 , 杨小锴 , 姚海华 , 吴旭 , 谈震 , 邵蔚 et al. 一种用于热控涂层的高熵合金材料和涂层及其制备方法 : CN202211288455.9. | 2022-10-20 . |
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Abstract ：
本发明涉及一种具有低热导率和高热稳定性的高熵硅酸盐陶瓷及其制备方法与应用。高熵陶瓷材料的化学式为RE2Si2O7，其中RE可为Er，Sc，Lu，Yb或Tm中的任意四种稀土元素。制备方法为：以四种RE2O3粉体和纯SiO2粉体为原料，以丙酮或无水乙醇为混合介质，用高能球磨机混合，充分混合的粉末经过烘干、研磨、筛分后，选取筛分后的细粉，在1500～1600℃的温度范围煅烧合成高熵陶瓷材料，然后采用放电等离子烧结法制备致密的块材陶瓷。所制备的陶瓷块材的致密度可达98％以上，经测量该材料具有非常低的热导率，在室温到1000℃范围内热导率均小于1.1W/m.K，可以用作防隔热材料。
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| GB/T 7714 | 贺定勇 , 欧克 , 郭星晔 et al. 一种具有低热导率和高热稳定性的高熵硅酸盐陶瓷及其制备方法与应用 : CN202210112836.5[P]. | 2022-01-29 . |
| MLA | 贺定勇 et al. "一种具有低热导率和高热稳定性的高熵硅酸盐陶瓷及其制备方法与应用" : CN202210112836.5. | 2022-01-29 . |
| APA | 贺定勇 , 欧克 , 郭星晔 , 崔丽 , 周正 , 谈震 et al. 一种具有低热导率和高热稳定性的高熵硅酸盐陶瓷及其制备方法与应用 : CN202210112836.5. | 2022-01-29 . |
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Abstract ：
In the present research, spherical W–Mo alloy powder for additive manufacturing was successfully synthesized by spray granulation (SG) in combination with thermal plasma spheroidization (TPS). Firstly, W and Mo particles (1–3 μm) were banded together through SG and formed porous agglomerated powder with desired particle size distribution and flowability. The porous agglomerated W–Mo powder was subsequently melted through thermal plasma, W and Mo dissolved together and formed solid solution accompanied with powder densification during TPS. Through optimization of the process conditions, the spheroidized W–Mo alloy powder exhibits homogeneous element distribution, low oxygen content (~0.08%), and good flowability (10 s/50 g), which meet the demand for laser powder bed fusion (LPBF). Remarkably, nearly full dense W–Mo alloy with few pores could be fabricated by LPBF based on the spheroidized W–Mo alloy powder. © 2020 Elsevier Ltd
Keyword ：
Agglomeration Agglomeration Particle size analysis Particle size analysis Molybdenum alloys Molybdenum alloys Industrial research Industrial research Additives Additives 3D printers 3D printers Particle size Particle size Granulation Granulation Compressive strength Compressive strength
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| GB/T 7714 | Tan, Zhen , Zhou, Zhenlu , Wu, Xu et al. In situ synthesis of spherical W–Mo alloy powder for additive manufacturing by spray granulation combined with thermal plasma spheroidization [J]. | International Journal of Refractory Metals and Hard Materials , 2021 , 95 . |
| MLA | Tan, Zhen et al. "In situ synthesis of spherical W–Mo alloy powder for additive manufacturing by spray granulation combined with thermal plasma spheroidization" . | International Journal of Refractory Metals and Hard Materials 95 (2021) . |
| APA | Tan, Zhen , Zhou, Zhenlu , Wu, Xu , Wang, Yiming , Shao, Wei , Guo, Xingye et al. In situ synthesis of spherical W–Mo alloy powder for additive manufacturing by spray granulation combined with thermal plasma spheroidization . | International Journal of Refractory Metals and Hard Materials , 2021 , 95 . |
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