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学者姓名：周正
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摘要 ：
Wire -arc sprayed Al -based composite coatings attracted great attentions due to their prospective application in offshore engineering. However, the difficulty in regulating ceramic reinforcements limited the performance of these coatings. In this work, we proposed a novel rotary swaging (RS) process to improve the deposition of ceramic particles, thus the Al/Al2O3 composite coating was prepared and evaluated in comparison with the traditional coating by spraying the drawing cored wires. As expected, the RS process promotes the melt of Al2O3 particles, leading to a significant increase of their deposition fraction with the simultaneous improvement in coating compactness and the interfacial bonding of heterogeneous splats. The sufficient melt of Al2O3 particles is attributed to the enhanced cohesion strength of filled powders to bear the vibration of arc force and facilitate heat transport. The explored composite coating displays a superior corrosion resistance in 3.5 wt% NaCl aqueous solution, due to the reduced active area on electrode surface and the lower sensitivity to pitting. Benefiting from a dynamic self -reinforcing effect, the explored composite coating presents lower coefficient of friction and significantly enhanced wear resistance under dry frictional condition. The present results demonstrate a great potential of the developed Al/Al2O3 composite coating in offshore application and provide an inspiration for future works aiming to exploit the high-performance metal -matrix composite coatings synthesized by low-cost wire -arc spraying.
关键词 ：
Wear behavior Wear behavior Rotary swaging process Rotary swaging process Corrosion behavior Corrosion behavior Al -based composite coating Al -based composite coating
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| GB/T 7714 | Zhao, Wanxin , Lu, Yang , Fu, Hanguang et al. Developing rotary swaging process for improving the performance of wire-arc sprayed Al/Al2O3 composite coating [J]. | SURFACE & COATINGS TECHNOLOGY , 2024 , 484 . |
| MLA | Zhao, Wanxin et al. "Developing rotary swaging process for improving the performance of wire-arc sprayed Al/Al2O3 composite coating" . | SURFACE & COATINGS TECHNOLOGY 484 (2024) . |
| APA | Zhao, Wanxin , Lu, Yang , Fu, Hanguang , He, Dingyong , Tan, Zhen , Yao, Haihua et al. Developing rotary swaging process for improving the performance of wire-arc sprayed Al/Al2O3 composite coating . | SURFACE & COATINGS TECHNOLOGY , 2024 , 484 . |
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摘要 ：
本发明涉及材料加工工程技术领域，具体为一种制备高氧化铝含量Al基复合涂层的无缝粉芯丝材及其制备方法。该粉芯丝材采用工业纯铝管包裹粉芯并经旋转锻造得到，所述粉芯包括铝合金粉末和Al2O3陶瓷粉末，所述粉芯中氧化铝陶瓷粉末的总含量≥30wt％。本发明通过调控粉芯丝成分并结合旋锻工艺，可制得高Al2O3含量的粉芯丝材，该粉芯丝材外表光滑、致密度高、热传导效率高，尤其适用于高耐磨性电弧喷涂涂层的制备，制备出的涂层与基体之间结合良好，涂层中无明显缺陷，陶瓷相分布均匀、沉积率高，因此硬度高，耐磨性好。
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| GB/T 7714 | 周正 , 赵万新 , 姚海华 et al. 一种制备高氧化铝含量Al基复合涂层的无缝粉芯丝材及其制备方法 : CN202310009965.6[P]. | 2023-01-04 . |
| MLA | 周正 et al. "一种制备高氧化铝含量Al基复合涂层的无缝粉芯丝材及其制备方法" : CN202310009965.6. | 2023-01-04 . |
| APA | 周正 , 赵万新 , 姚海华 , 路洋 , 杨延格 , 臧勃林 et al. 一种制备高氧化铝含量Al基复合涂层的无缝粉芯丝材及其制备方法 : CN202310009965.6. | 2023-01-04 . |
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摘要 ：
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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摘要 ：
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 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明涉及材料加工工程技术领域，具体为一种高摩擦系数的Al/氧化铝复合涂层用无缝粉芯丝材及其制备方法，该粉芯丝材包括外皮和粉芯，所述粉芯包括粒径在15～75μm的铝合金粉末以及粒径分别在15～75μm和350～420μm的氧化铝陶瓷粉末，且所述粉芯中氧化铝陶瓷粉末的总含量≥20wt％，采用工业纯铝管包裹粉芯并经旋转锻造得到。本发明通过采用铝合金粉末和多尺度的Al2O3陶瓷粉末混合，能够得到具有致密度高、导热性好、均匀性好的粉芯丝材，进而显著提高电弧喷涂涂层的耐磨性。
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| GB/T 7714 | 周正 , 路洋 , 姚海华 et al. 一种高摩擦系数的Al/氧化铝复合涂层用无缝粉芯丝材及其制备方法 : CN202310010264.4[P]. | 2023-01-04 . |
| MLA | 周正 et al. "一种高摩擦系数的Al/氧化铝复合涂层用无缝粉芯丝材及其制备方法" : CN202310010264.4. | 2023-01-04 . |
| APA | 周正 , 路洋 , 姚海华 , 赵万新 , 杨延格 , 臧勃林 et al. 一种高摩擦系数的Al/氧化铝复合涂层用无缝粉芯丝材及其制备方法 : CN202310010264.4. | 2023-01-04 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Thermal sprayed high entropy alloy coatings have garnered substantial attention for their remarkable mechanical properties and wear resistance. In this study, we explored the wear behavior and mechanisms of Al0.6TiCrFeCoNi coatings produced through atmospheric plasma spray (APS) at both room temperature and 500 degrees C. The microstructural and mechnical characterization of the APS-sprayed coating was performed using XRD, OM, SEM, CSLM and hardness testing techniques. The dry sliding wear test of the coating against Al2O3 ball were conducted on a pin-on-disc tribometer at room temperature and 500 degrees C. The coating exhibited a single body-centered cubic (BCC) phase, with a typical lamellar structure marked by oxides and pores. Wear tests showed that the APS-sprayed coating exhibits superior wear resistance at elevated temperatures compared to room temperature due to the formation of compact oxide layer on the wear track. Detailed investigations on wear track reveal that abrasive wear, oxidation wear and fatigue wear are the prominent wear mechanisms on both conditions, while tribo-oxidation is dominated at 500 degrees C. Furthermore, We demonstrated that the looser, more porous microstructure of the APS-sprayed coating contributes to its enhanced wear resistance, preventing crack propagation and increasing strain tolerance. This provides a promising strategy for outstanding wear resistant coatings by designing looser lamellar coating structure.
关键词 ：
High entropy alloy High entropy alloy Oxide layer Oxide layer Wear Wear APS-sprayed coating APS-sprayed coating
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| GB/T 7714 | Chen, Lijia , Wang, Xiangzhao , Ji, Yaotang et al. Elevated-temperature wear behavior and mechanisms of APS-sprayed Al0.6TiCrFeCoNi high entropy alloy coating [J]. | SURFACE & COATINGS TECHNOLOGY , 2023 , 477 . |
| MLA | Chen, Lijia et al. "Elevated-temperature wear behavior and mechanisms of APS-sprayed Al0.6TiCrFeCoNi high entropy alloy coating" . | SURFACE & COATINGS TECHNOLOGY 477 (2023) . |
| APA | Chen, Lijia , Wang, Xiangzhao , Ji, Yaotang , Yao, Haihua , He, Dingyong , Tan, Zhen et al. Elevated-temperature wear behavior and mechanisms of APS-sprayed Al0.6TiCrFeCoNi high entropy alloy coating . | SURFACE & COATINGS TECHNOLOGY , 2023 , 477 . |
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摘要 ：
To obtain compatible properties of low thermal conductivity and high thermal stability, Al0.6CoCrFeNiTi highentropy alloy was designed as a novel candidate of metal-based thermal barrier coatings (MBTBCs). The corresponding high-entropy alloy coatings were fabricated by both high-velocity oxygen-fuel spraying (HVOF) and atmospheric plasma spraying (APS), and then the dependence of thermal insulation properties on microstructure was investigated. The both coatings exhibit a simple body-centered cubic (BCC) structure, but present obvious difference in microstructure and defect characters which relates to the evolution of in-flight particles. Benefit from the extremely low thermal conductivity, the APS-deposited coating can increase 13.24 degrees C of the surface temperature of piston crown and yield a temperature reduction of 19.00 degrees C along the thickness direction, which mean a positivity on enhancing the power efficiency of vehicle engines without sacrificing the strength of aluminum alloy components. In virtue of a decoupling method, the crucial effect of microstructure on thermal conductivity is disclosed, thus interpreting the excellent thermal insulation property of APS-deposited coating dominated by grain refinement and disordered BCC structure. The present results demonstrate a great potential of high-entropy alloy coatings as thermal barrier application and provide an inspiration for future works aiming to design these coatings to meet specific engineering needs.
关键词 ：
Thermal barrier coating Thermal barrier coating Microstructure Microstructure High-entropy alloy High-entropy alloy Thermal conductivity Thermal conductivity
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| GB/T 7714 | Wang, Xiangzhao , Yao, Haihua , Yuan, Li et al. Novel candidate of metal-based thermal barrier coatings: High-entropy alloy [J]. | SURFACE & COATINGS TECHNOLOGY , 2023 , 474 . |
| MLA | Wang, Xiangzhao et al. "Novel candidate of metal-based thermal barrier coatings: High-entropy alloy" . | SURFACE & COATINGS TECHNOLOGY 474 (2023) . |
| APA | Wang, Xiangzhao , Yao, Haihua , Yuan, Li , Chen, Lijia , Xu, Fengfeng , Tan, Zhen et al. Novel candidate of metal-based thermal barrier coatings: High-entropy alloy . | SURFACE & COATINGS TECHNOLOGY , 2023 , 474 . |
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摘要 ：
Fe-based amorphous coatings have been proposed to perform a promising thermal barrier application, however, the uncertain degeneration of properties induced by thermal stimulation is significantly concerned owing to their metastable nature. Herein, Fe57Cr15Nb4B20Si4 amorphous coating with a low thermal conductivity was employed to investigate the degeneration of thermal insulation property and related mechanisms during long-term heat exposure. Excellent stability can be defined for the amorphous coating when annealed below glass transition temperature, despite a slight increase of thermal conductivity induced by structural relaxation. Extraordinary increase of thermal conductivity is found when prolonged annealing time at a critical temperature of 600 degrees C. The sluggish structural sintering dominates thermal conductivity to increase, whereas the effect of precipitated ultrafine nanocrystals is little. The cooperation of grain coarsening and structural sintering leads to a dramatical increase of thermal conductivity at the initial stage of 850 degrees C annealing, while the relatively low increase of thermal conductivity with prolonged duration is ascribed to the further grain growth. The obtained results demonstrate a comprehensive understanding on the thermal evolution of Fe-based amorphous coatings and form a basis for future works aiming to shed further light on the degeneration of related metallic coatings at high temperatures.
关键词 ：
Fe -based amorphous alloy Fe -based amorphous alloy Microstructure transformation Microstructure transformation Thermal conductivity Thermal conductivity Structural sintering Structural sintering Thermal barrier coating Thermal barrier coating
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| GB/T 7714 | Xu, Fengfeng , Yao, Haihua , Tang, Kaizhi et al. Degeneration of thermal insulation property for Fe-based amorphous coating during long-term heat exposure [J]. | JOURNAL OF NON-CRYSTALLINE SOLIDS , 2023 , 606 . |
| MLA | Xu, Fengfeng et al. "Degeneration of thermal insulation property for Fe-based amorphous coating during long-term heat exposure" . | JOURNAL OF NON-CRYSTALLINE SOLIDS 606 (2023) . |
| APA | Xu, Fengfeng , Yao, Haihua , Tang, Kaizhi , Li, Yanze , Han, Fengxi , Tan, Zhen et al. Degeneration of thermal insulation property for Fe-based amorphous coating during long-term heat exposure . | JOURNAL OF NON-CRYSTALLINE SOLIDS , 2023 , 606 . |
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摘要 ：
The correlation between the thermal transport properties and microstructure features of amorphous coatings is crucial for reliable thermal insulation applications. In this work, an Fe48Cr15Mo14C15B6Y2 amorphous coating prepared by high-velocity oxygen-fuel spraying (HVOF) was employed to reveal this relationship under long-term heating. From the combined effects of the amorphous phase and unique coating structure, the proposed coating exhibits an extremely low thermal conductivity of 1.92 W/(m center dot K), granting a significant potential for being as metal-based thermal barrier coatings. Isothermal annealing experiments below the glass transition temperature demonstrate that the thermal insulation property can maintain stability with prolonged annealing time, despite a slight degradation relative to the as-sprayed coating which is ascribed to structural relaxation. Although nearly full crystallization can be slowly induced by annealing at the critical temperature of 600 degrees C, the thermal conductivity displays a distinct two-stage variation with annealing time, which is primarily attributed to the sluggish sintering of the coating structure. Moreover, grain growth and rapid structural sintering result in a drastic degradation of thermal insulation in the early stage of annealing at 850 degrees C, whereas grain growth upon prolonged annealing governs further variation of thermal conductivity. The results of this study not only provide important insights into the degeneration mechanism of thermal insulation of Fe-based amorphous coating, but also present an inspiration for exploring the degeneration mechanism of the most metallic coatings serving at high temperatures.
关键词 ：
Microstructure transformation Microstructure transformation Thermal conductivity Thermal conductivity Fe-based amorphous coating Fe-based amorphous coating Structural sintering Structural sintering
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| GB/T 7714 | Yao, Haihua , Xu, Fengfeng , Wang, Xiangzhao et al. Thermal transport property correlated with microstructure transformation and structure evolution of Fe-based amorphous coating [J]. | SURFACE & COATINGS TECHNOLOGY , 2023 , 457 . |
| MLA | Yao, Haihua et al. "Thermal transport property correlated with microstructure transformation and structure evolution of Fe-based amorphous coating" . | SURFACE & COATINGS TECHNOLOGY 457 (2023) . |
| APA | Yao, Haihua , Xu, Fengfeng , Wang, Xiangzhao , Zeng, Yong , Tan, Zhen , He, Dingyong et al. Thermal transport property correlated with microstructure transformation and structure evolution of Fe-based amorphous coating . | SURFACE & COATINGS TECHNOLOGY , 2023 , 457 . |
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摘要 ：
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.
关键词 ：
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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