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学者姓名：符寒光
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Abstract ：
An AlCoCrFeNi high-entropy alloy coating containing 20 % mass fraction of TiC was prepared using the laser cladding method. The effect of heat treatment on the coating's microstructure was analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), electron backscattered diffraction (EBSD), and transmission electron microscopy (TEM). It was observed that following high-temperature heat treatment, the phase transition of AlCoCrFeNi-20%TiC shifted from BCC to FCC at 750 degree celsius. Through microhardness and wear resistance tests, the increased diffusion of carbon post-heat treatment led to a higher precipitation of TiC-reinforced phases, resulting in exceptional wear resistance with a notable 128.3 % enhancement.
Keyword ：
AlCoCrFeNi high-entropy alloy AlCoCrFeNi high-entropy alloy laser cladding laser cladding in-situ TiC strengthening in-situ TiC strengthening microstructure microstructure wear resistance wear resistance
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| GB/T 7714 | Wang, Mingxin , Li, Yutao , Jin, Tounan et al. Wear resistance optimized by heat treatment of an in-situ TiC strengthened AlCoCrFeNi laser cladding coating [J]. | MATERIALS TESTING , 2024 , 66 (8) : 1168-1182 . |
| MLA | Wang, Mingxin et al. "Wear resistance optimized by heat treatment of an in-situ TiC strengthened AlCoCrFeNi laser cladding coating" . | MATERIALS TESTING 66 . 8 (2024) : 1168-1182 . |
| APA | Wang, Mingxin , Li, Yutao , Jin, Tounan , Fu, Hanguang . Wear resistance optimized by heat treatment of an in-situ TiC strengthened AlCoCrFeNi laser cladding coating . | MATERIALS TESTING , 2024 , 66 (8) , 1168-1182 . |
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Abstract ：
In situ synthesized (Ti, V)C reinforced Ni-based composite coatings were prepared using laser cladding method. The phase composition, microstructure, hardness, and wear resistance of the composite coatings with different carbide contents were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), hardness tester, and wear tester. The evolution process of the melt pool was elucidated. In comparison with the Ni45 laser-clad coating, the microhardness and wear resistance of the Ni-based composite coatings containing (Ti, V)C were significantly enhanced. The best wear resistance and highest average hardness of 835.9 HV of the composite coatings was achieved at a design content of 10 wt.% of (Ti, V)C. Compared to the Ni45 coating, the wear resistance increased from 1.6 to 17.1 min/mg, an improvement of approximately 9.76 times. First-principles calculations were employed to assess the mechanical properties, anisotropy, and electronic properties of the composite ceramic phase (Ti, V)C. Hardness calculations were conducted using a predictive model. The computational results indicated that (Ti, V)C exhibits strong covalent bonding characteristics, with a calculated hardness of 3235 HV exceeding that of TiC and VC.
Keyword ：
wear resistance wear resistance laser cladding laser cladding nickel-based composite coating nickel-based composite coating (Ti, V)C reinforced phase (Ti, V)C reinforced phase first-principles calculations first-principles calculations
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| GB/T 7714 | Sun, Ze , Fu, Hanguang , Lin, Jian et al. Microstructure and Wear Resistance of In Situ Synthesized (Ti,V)C Reinforced Nickel Matrix Composite Coatings [J]. | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
| MLA | Sun, Ze et al. "Microstructure and Wear Resistance of In Situ Synthesized (Ti,V)C Reinforced Nickel Matrix Composite Coatings" . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2024) . |
| APA | Sun, Ze , Fu, Hanguang , Lin, Jian , Zhang, Jiguang , Zong, Bin , Yang, Xiaojun . Microstructure and Wear Resistance of In Situ Synthesized (Ti,V)C Reinforced Nickel Matrix Composite Coatings . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
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Abstract ：
The corrosive wear resistance of copper-bearing HHCCI was tested through experiments and HRTEM, combined with first-principles calculations to study the atomic structure, interface fracture work, thermodynamic stability, electronic structure and bonding structure of six Fe3Cr4C3(01 1 0)/gamma-Fe(101) interface models with different termination methods. The HRTEM results show that the interface formed by (01 1 0) of M7C3-type carbide and (101) of the austenite matrix is a coherent interface. The first principles calculation results show that the interface formed by the Fe3Cr4C3(01 1 0)-Cr termination model and the gamma- Fe (101)-2 termination model has the highest interface bonding strength. The Fe-end/7Fe-2 interface model is the most stable. Both the interfacial chemical energy and the interfacial elastic energy will affect the overall thermodynamic stability of the Fe3Cr4C3(01 1 0)/gamma-Fe (101) interface. The fracture work of Fe3Cr4C3(01 1 0) and gamma- Fe (101) is greater than the corresponding interface adhesion work. Moreover, the fracture work on each terminal end of M7C3 along the (01 1 0) surface is higher than that on each terminal end of gamma- Fe along the (101) surface. The failure of HHCCI during corrosive wear may mainly occur in the interface area or the side close to the gamma- Fe matrix. The chemical bonds in the Fe-end/7Fe interface are mainly Fe-Fe metal bonds, Fe-Cr metal bonds and some Fe-C polar covalent bonds. The chemical bonds in the Cr-end/7Fe interface are mainly Cr-Fe metal bonds and some Cr-C polar covalent bonds. The chemical bonds in the C-end/7Fe interface are mainly composed of Cr-Fe metal bonds, C-Fe polar covalent bonds and part of C-Cr polar covalent bonds, as a result, each interface exhibits different corrosive wear resistance potentials.
Keyword ：
Hypereutectic high chromium cast iron Hypereutectic high chromium cast iron First principles calculation First principles calculation Corrosive wear resistance Corrosive wear resistance Interface Interface
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| GB/T 7714 | Gong, Liqiang , Du, Hejun , Absi, Rafik et al. Cu-bearing HHCCI interface combined with first principles calculation and corrosive wear resistance [J]. | INTERMETALLICS , 2024 , 175 . |
| MLA | Gong, Liqiang et al. "Cu-bearing HHCCI interface combined with first principles calculation and corrosive wear resistance" . | INTERMETALLICS 175 (2024) . |
| APA | Gong, Liqiang , Du, Hejun , Absi, Rafik , Huang, Longxiao , Fu, Hanguang . Cu-bearing HHCCI interface combined with first principles calculation and corrosive wear resistance . | INTERMETALLICS , 2024 , 175 . |
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Abstract ：
本发明公开了一种等离子喷丝制备碱性水电解用镍电极的制备方法，属于材料表面工程领域。采用丝材为Ni5Al或纯Ni丝，丝材直径为1.6±0.03mm，丝材成分原子百分比为：Ni：95％，Al：余量；或Ni：＞99.9％。用等离子喷涂制备此种碱性水解用镍电极时，先使用机械打磨或者喷砂处理基体表面，使用纯Ni丝时需在惰性气氛环境下进行喷涂，喷涂工艺参数：电压40‑45V；电流300‑350A；喷涂距离100‑500mm；喷涂角度45°‑60°；氩气流量20‑25L/min；氢气流量1‑2L/min；送丝速度2.5‑3m/min；涂层厚度300～500μm。本发明通过等离子喷丝的方式，制备出了孔隙率23％‑38.5％的碱性水解用镍电极，所获得的电极具有比表面积大，电化学催化性能好的优点。
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| GB/T 7714 | 李辉 , 黄振杰 , 邓晶 et al. 一种等离子喷丝制备碱性水电解用镍电极的制备方法 : CN202310243452.1[P]. | 2023-03-14 . |
| MLA | 李辉 et al. "一种等离子喷丝制备碱性水电解用镍电极的制备方法" : CN202310243452.1. | 2023-03-14 . |
| APA | 李辉 , 黄振杰 , 邓晶 , 张鹏 , 林健 , 符寒光 . 一种等离子喷丝制备碱性水电解用镍电极的制备方法 : CN202310243452.1. | 2023-03-14 . |
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Abstract ：
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 . |
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Abstract ：
The effects of silicon alloying and heat treatment on the microstructure and properties of Fe-35Cr-4C-xSi (x = 0.5, 1.2, 19, 2.6) hypereutectic high-chromium cast iron (HHCCI) were explored through first-principles calculations and phase diagram calculations combined with XRD, SEM, TEM and other methods. With the increase of Si content, the matrix structure of HHCCI transforms from martensite to ferrite. The phase diagram analysis reveals that higher silicon content results in elevated austenite transformation initiation temperatures, reduced austenite phase areas, and expanded ferrite phase regions. Additionally, the study calculates the diffusion activation energy of C atoms within silicon-bearing and silicon-free HHCCI matrices, providing valuable insights into the role of silicon in promoting the transformation of the HHCCI matrix into ferrite. Notably, silicon facilitates the diffusion of C atoms into the silicon-bearing HHCCI matrix, thereby preventing complete austenitization. After ultra-high-temperature heat treatment, the matrix structure of high-silicon HHCCI (1.9 wt.% Si) can be transformed from ferrite to martensite. With the increase of Si content, the corrosive wear resistance of HHCCI increases first and then decreases. The 1.9Si HHCCI after ultra-high-temperature heat treatment exhibits the best corrosive wear resistance in both acidic and alkaline corrosive wear environments, and the silicon-bearing HHCCI is more resistant to alkaline corrosive wear. This study reveals promising applications of silicon-bearing HHCCI in industries such as hydraulics and coal mining, particularly as a material for making slurry pumps. Notably, in comparison with previous work by our research group, this study delves deeper into the mechanisms underlying the structural and performance changes of silicon-bearing HHCCI due to heat treatment and silicon content variation.
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| GB/T 7714 | Gong, Liqiang , Chen, Zhengyang , Xing, Zhenguo et al. Microstructure evolution and corrosive wear of heat-treated silicon-bearing hypereutectic high-chromium cast iron [J]. | JOURNAL OF MATERIALS SCIENCE , 2023 , 58 (46) : 17623-17647 . |
| MLA | Gong, Liqiang et al. "Microstructure evolution and corrosive wear of heat-treated silicon-bearing hypereutectic high-chromium cast iron" . | JOURNAL OF MATERIALS SCIENCE 58 . 46 (2023) : 17623-17647 . |
| APA | Gong, Liqiang , Chen, Zhengyang , Xing, Zhenguo , Fu, Hanguang . Microstructure evolution and corrosive wear of heat-treated silicon-bearing hypereutectic high-chromium cast iron . | JOURNAL OF MATERIALS SCIENCE , 2023 , 58 (46) , 17623-17647 . |
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Abstract ：
The effect of the modification treatment on the refinement of primary carbides and wear resistance of 35% Cr-4.0% C hypereutectic high chromium cast iron (HHCCI) was investigated using the first-principles calculations, XRD, SEM, TEM, hardness tests, and wear tests. The addition of N elements to HHCCI refined the size of the M7C3 primary carbide from 13.25 & PLUSMN; 0.72 mm to 11.67 & PLUSMN; 0.33 mm under the effect of adsorption refinement. When the compound modification elements (N + Ti + V + RE-Mg) were added, the combination of adsorption refinement and heterogeneous nucleation refinement significantly reduced the carbide size to 5.35 & PLUSMN; 0.15 mm. The refinement of the M7C3 primary carbide can be attributed to two components: 1) the refinement of the heterogeneous nucleation of TiC and VC. 2) the combination of N, Ti, and V with the M7C3 preferred growth surface (0001) resulting in the refinement by adsorption and reduce the size of the primary carbide. The hypereutectic high chromium cast iron after the compound modification exhibited excellent wear resistance. Under dry sliding wear condition, Compared with the unmodified sample, the wear resistance increased by 75%. Under corrosive wear conditions, the wear resistance is increased by 98.1%.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keyword ：
Primary carbide Primary carbide First principle calculation First principle calculation Hypereutectic high chromium cast iron Hypereutectic high chromium cast iron Modification Modification Wear resistance Wear resistance
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| GB/T 7714 | Gong, Liqiang , Fu, Hanguang , Yang, Penghui et al. Refinement of primary carbides and improvement of wear resistance of hypereutectic high chromium cast iron after modification [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2023 , 24 . |
| MLA | Gong, Liqiang et al. "Refinement of primary carbides and improvement of wear resistance of hypereutectic high chromium cast iron after modification" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 24 (2023) . |
| APA | Gong, Liqiang , Fu, Hanguang , Yang, Penghui , Ji, Xiaoliang , Yin, Wenhang , Lin, Jian . Refinement of primary carbides and improvement of wear resistance of hypereutectic high chromium cast iron after modification . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2023 , 24 . |
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Abstract ：
The effect of the tempering process on the microstructure evolution and hardness of 35 wt.%Cr-4 wt.%C Hypereutectic High Chromium Cast Iron (HHCCI) was studied by means of the scanning electron microscope and transmission electron microscope. The results show that with the increase in tempering temperature, the primary and eutectic carbides of HHCCI have no significant change, and the precipitation of secondary carbides in the matrix increases at first and then decreases. From the TEM analysis results, the secondary carbides after tempering are M23C6, which are rectangular, and with the extension of tempering time, a small part of eutectic carbides decompose and dissolve into the matrix, and the secondary carbides continue to precipitate and grow, and the length can reach several microns to more than 10 microns. With the increase in tempering temperature, the hardness of HHCCI increases, and the hardness tends to decrease when it exceeds 500 degrees C. After tempering for 6 h, the precipitation of secondary carbides in the matrix reaches the maximum, and the hardness of HHCCI reaches the maximum. After tempering holding time for more than 6 h, the hardness of HHCCI decreases continuously due to the aggregation and growth of secondary carbides.
Keyword ：
tempering temperature tempering temperature microstructure evolution microstructure evolution hardness hardness hypereutectic high chromium cast iron hypereutectic high chromium cast iron holding time holding time
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| GB/T 7714 | Liu, Yawei , Liu, Wei , Yang, Penghui et al. Microstructure Evolution and Hardness of Hypereutectic High Chromium Cast Iron after Tempering [J]. | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2023 , 33 (6) : 2724-2735 . |
| MLA | Liu, Yawei et al. "Microstructure Evolution and Hardness of Hypereutectic High Chromium Cast Iron after Tempering" . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 33 . 6 (2023) : 2724-2735 . |
| APA | Liu, Yawei , Liu, Wei , Yang, Penghui , Fu, Hanguang , Yin, Wenhang , Jin, Tounan et al. Microstructure Evolution and Hardness of Hypereutectic High Chromium Cast Iron after Tempering . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2023 , 33 (6) , 2724-2735 . |
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Abstract ：
In order to further improve the wear resistance of Hypereutectic High Chromium Cast iron (HHCCI), the effects of different Cu contents on the microstructure and properties of HHCCI were systematically studied. It was found that with the increase of Cu content, the carbide size was refined, and the increase of Cu content led to the increase of austenite and the decrease of hardness in as-cast HHCCI. After heat treatment at 1050 degrees C, the hardness of HHCCI increased significantly compared with as-cast. And with the increase of Cu content, the hardness of HHCCI increased first and then decreased, and the hardness was the highest when 0.5 wt% Cu was added. The increase of copper content promotes the precipitation of secondary carbides and makes the interface between alpha-Fe and M23C6-type secondary carbides a semi-coherent boundary. With the increase of Cu content, the wear loss of HHCCI decreased after heat treatment at 1050 degrees C, and the wear resistance improved. When the Cu content increased to 1.0 wt%, the wear resistance of HHCCI was the best, which was 2.6 times that of copper-free HHCCI. The continued increase of copper content has no obvious effect on the wear resistance of HHCCI. In addition, a small amount of Cu tends to adsorb on the (0001) preferential growth surface of M7C3-type carbides, thereby refining the carbides. From the First-principles calculations, the solid solution strengthening effect of Cu on the matrix and the adsorption and refinement of carbides were revealed, and the influence mechanism on the wear resistance of HHCCI was characterized.
Keyword ：
Carbides Carbides Cu alloying Cu alloying First-principles calculations First-principles calculations Wear resistance Wear resistance Hypereutectic high chromium cast iron Hypereutectic high chromium cast iron
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| GB/T 7714 | Gong, Liqiang , Fu, Hanguang , Zhi, Xiaohui . Microstructure and properties of Cu-bearing hypereutectic high chromium cast iron [J]. | MATERIALS CHARACTERIZATION , 2023 , 195 . |
| MLA | Gong, Liqiang et al. "Microstructure and properties of Cu-bearing hypereutectic high chromium cast iron" . | MATERIALS CHARACTERIZATION 195 (2023) . |
| APA | Gong, Liqiang , Fu, Hanguang , Zhi, Xiaohui . Microstructure and properties of Cu-bearing hypereutectic high chromium cast iron . | MATERIALS CHARACTERIZATION , 2023 , 195 . |
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Abstract ：
As a typical wear-resistant material, TiC particle-reinforced AlCoCrFeNi composite coatings have great advan-tages. In this work, the Mo was added to AlCoCrFeNi-TiC coatings to further improve the wear resistance, which were fabricated as AlCoCrFeNiMox-TiC (x: molar ratio; x = 0, 0.2, 0.5, 0.8) composite coatings by laser cladding. The microstructure evolution, hardness, and wear resistance were investigated in detail. The results show that a ring of (Ti, Mo)C phase is formed in the outer layer of TiC particles due to the substitution of Mo atoms. Based on the first-principles calculations, the lattice constant of (Ti, Mo)C phase is 4.328 angstrom, slightly smaller than that of TiC. More importantly, Mo can significantly reduce the interface energy from 0.27 J center dot m(-2) to -0.18 J center dot m(-2), thus improving the interface stability. The coating matrix (CM) exhibits a spinodal structure of B2 + sigma phase, caused by the generation of sigma phase. The sigma phase has a calculated hardness of about 15.3 GPa, which is undoubtedly conducive to wear resistance of the CM. With the addition of Mo, the hardness of composite coating increases from 611.9 HV0.3 to 822.6 HV0.3. All the coatings present high wear resistance, as evidenced by the abrasive wear mechanisms.
Keyword ：
Sigma phase Sigma phase Wear resistance Wear resistance TiC particles TiC particles Laser cladding Laser cladding High entropy alloy High entropy alloy
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| GB/T 7714 | Li, Yutao , Fu, Hanguang , Wang, Kaiming et al. Effect of Mo addition on microstructure and wear resistance of laser clad AlCoCrFeNi-TiC composite coatings [J]. | APPLIED SURFACE SCIENCE , 2023 , 623 . |
| MLA | Li, Yutao et al. "Effect of Mo addition on microstructure and wear resistance of laser clad AlCoCrFeNi-TiC composite coatings" . | APPLIED SURFACE SCIENCE 623 (2023) . |
| APA | Li, Yutao , Fu, Hanguang , Wang, Kaiming , Yang, Xiaojun , Zong, Bin , Lin, Jian . Effect of Mo addition on microstructure and wear resistance of laser clad AlCoCrFeNi-TiC composite coatings . | APPLIED SURFACE SCIENCE , 2023 , 623 . |
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