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学者姓名：周正
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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 ：
激光选区熔化技术在航空航天领域的发展现状及典型应用
Keyword ：
材料体系 材料体系 激光选区熔化 激光选区熔化 发展现状 发展现状 轻量化设计 轻量化设计 一体化复杂结构 一体化复杂结构
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| GB/T 7714 | 杨胶溪 , 吴文亮 , 王长亮 et al. 激光选区熔化技术在航空航天领域的发展现状及典型应用 [J]. | 杨胶溪 , 2021 , 41 (2) : 1-15 . |
| MLA | 杨胶溪 et al. "激光选区熔化技术在航空航天领域的发展现状及典型应用" . | 杨胶溪 41 . 2 (2021) : 1-15 . |
| APA | 杨胶溪 , 吴文亮 , 王长亮 , 刘晨光 , 王树志 , 阳代军 et al. 激光选区熔化技术在航空航天领域的发展现状及典型应用 . | 杨胶溪 , 2021 , 41 (2) , 1-15 . |
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Abstract ：
To satisfy the requirement for martensite stainless steel layers with high efficiency, an optimized FeNiCrMo alloy layer was prepared using the laser cladding technique. The microstructure and frictional wear behavior of the cladding layer (a single layer with a thickness exceeding 2 mm) were investigated. The results confirmed a homogeneous thickness and crack-free character of the cladding layer. In the microstructure, equiaxed, dendritic and cellular grains were distributed along the thickness direction, and martensite and Cr/Mo-rich ferrite were observed in the dendritic and inter-dendritic regions, respectively. The frictional coefficient and wear volume of the cladding layer increased under increasing applied loads in a block-on-ring wear test, and the wear mechanism was dominated by abrasive and oxidative wear types. Under higher loads, adhesive wear prevailed. In a ball-on-disc wear test, increasing the temperature decreased the frictional coefficient and increased the wear volume. Oxidative and fatigue wear dominated the wear mechanism under this condition.
Keyword ：
microstructure microstructure laser cladding laser cladding frictional wear frictional wear FeCrNiMo stainless steel FeCrNiMo stainless steel
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| GB/T 7714 | Zhao Wanxin , Zhou Zheng , Huang Jie et al. Microstructure and Frictional Wear Behavior of FeCrNiMo Alloy Layer Fabricated by Laser Cladding [J]. | ACTA METALLURGICA SINICA , 2021 , 57 (10) : 1291-1298 . |
| MLA | Zhao Wanxin et al. "Microstructure and Frictional Wear Behavior of FeCrNiMo Alloy Layer Fabricated by Laser Cladding" . | ACTA METALLURGICA SINICA 57 . 10 (2021) : 1291-1298 . |
| APA | Zhao Wanxin , Zhou Zheng , Huang Jie , Yang Yange , Du Kaiping , He Dingyong . Microstructure and Frictional Wear Behavior of FeCrNiMo Alloy Layer Fabricated by Laser Cladding . | ACTA METALLURGICA SINICA , 2021 , 57 (10) , 1291-1298 . |
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Abstract ：
Atmospheric plasma spraying (APS) is widely used in the fabrication of hydroxyapatite (HA) coating due to the advantages of low-cost, simple operation and it can be used to fabricate coatings with controllable structure. Despite all these advantages, the application of APS deposited HA coating for long-term use is limited by its low crystallinity, low phase purity and poor antibacterial property efficiency. Herein, HA coatings with high crystallinity, phase purity and c-axis crystalline orientation were fabricated by APS. In vitro cell, culture testing suggested that the c-axis oriented HA coating was more effective to promote the proliferation of osteoblasts cells compared with other coatings. The antibacterial activity of HA coating against the bacteria indicated that the c-axis oriented HA coating restrained the bacterial adhesion, and the antibacterial effect of the E. coli bacteria was more pronounced than that of the S. epidermidis bacteria. This study suggests that the HA coatings with the specific c-axis crystalline orientation are available for their potential applications for orthopedic and dental implantation. © 2021 Elsevier B.V.
Keyword ：
Plasma spraying Plasma spraying Bioactivity Bioactivity Hydroxyapatite Hydroxyapatite Crystallinity Crystallinity Escherichia coli Escherichia coli Plasma jets Plasma jets Crystalline materials Crystalline materials Coatings Coatings
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| GB/T 7714 | Liu, Xiaomei , He, Dingyong , Zhou, Zheng et al. In vitro bioactivity and antibacterial performances of atmospheric plasma sprayed c-axis preferential oriented hydroxyapatite coatings [J]. | Surface and Coatings Technology , 2021 , 417 . |
| MLA | Liu, Xiaomei et al. "In vitro bioactivity and antibacterial performances of atmospheric plasma sprayed c-axis preferential oriented hydroxyapatite coatings" . | Surface and Coatings Technology 417 (2021) . |
| APA | Liu, Xiaomei , He, Dingyong , Zhou, Zheng , Guo, Xingye , Liu, Yi , Hou, Wenjia et al. In vitro bioactivity and antibacterial performances of atmospheric plasma sprayed c-axis preferential oriented hydroxyapatite coatings . | Surface and Coatings Technology , 2021 , 417 . |
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Abstract ：
In this research, FeCrMoMn coatings with excellent corrosion resistance and metallurgical quality were deposited on the 45# steel substrate by conventional and high-speed laser cladding at the scanning speed of 0.4 m/min, 40 m/min and 70 m/min, respectively. Their microstructure, phase composition, hardness and corrosion resistance were characterized and compared. The results show that compared with the conventional cladding, high-speed laser cladding leads to a decrease in grain size, heat affected zone, and the dilution rate of the coatings due to solute trapping of coatings. Metallurgical bonding is formed between the substrate and the coatings, and the hardness and electrochemical corrosion resistance of the coatings are also significantly improved.
Keyword ：
Corrosion resistance Corrosion resistance Solute trapping Solute trapping FeCrMoMn coatings FeCrMoMn coatings Microstructure Microstructure High-speed laser cladding High-speed laser cladding
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| GB/T 7714 | Yang, Jiaoxi , Bai, Bing , Ke, Hua et al. Effect of metallurgical behavior on microstructure and properties of FeCrMoMn coatings prepared by high-speed laser cladding [J]. | OPTICS AND LASER TECHNOLOGY , 2021 , 144 . |
| MLA | Yang, Jiaoxi et al. "Effect of metallurgical behavior on microstructure and properties of FeCrMoMn coatings prepared by high-speed laser cladding" . | OPTICS AND LASER TECHNOLOGY 144 (2021) . |
| APA | Yang, Jiaoxi , Bai, Bing , Ke, Hua , Cui, Zhe , Liu, Zhe , Zhou, Zheng et al. Effect of metallurgical behavior on microstructure and properties of FeCrMoMn coatings prepared by high-speed laser cladding . | OPTICS AND LASER TECHNOLOGY , 2021 , 144 . |
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Abstract ：
To improve thermal barrier applications in advanced vehicle engines, a novel Fe-based amorphous composite coating was designed by introducing ceramic oxides and was prepared by atmospheric plasma spraying (APS). The microstructure and related properties of the as-deposited coating were investigated in detail. The composite coating comprises a well-formed FeCrNbBSi amorphous metallic matrix and dispersed yttria-stabilized zirconia (YSZ) splats. A unique Si-oxide interfacial layer with a thickness of several nanometers and an amorphous structure forms between the metallic matrix and ceramic phase, which is attributed to a combination of multiple effects. The composite coating displays extremely low thermal conductivity from 2.28 W/mK at 100 °C to 3.36 W/mK at 600 °C and can increase the surface temperature of the piston crown by 18.93 °C, which implies a significant means of enhancing the power efficiency. The improved thermal barrier ability of the composite coating is revealed as the crucial effect of the Si-oxide interfacial layer, which induces an increased interfacial thermal resistance. The fracture toughness of the composite coating remains at 3.40 MPa·m1/2, comparable to that of the monolithic amorphous coating, 3.74 MPa·m1/2, which is closely related to the formation of a Si-oxide layer and its nanoscale thickness. Therefore, the Fe-based amorphous composite coating developed here demonstrates great potential as an innovative metal-based thermal barrier coating for application in vehicle engines and provides specific inspiration for future works exploring the interfacial engineering of coating.
Keyword ：
composite coating composite coating interfacial layer interfacial layer thermal conductivity thermal conductivity Fe-based amorphous alloy Fe-based amorphous alloy fracture toughness fracture toughness
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| GB/T 7714 | Zhou Zheng , Han Feng-Xi , Yao Hai-Hua et al. Novel Fe-Based Amorphous Composite Coating with a Unique Interfacial Layer Improving Thermal Barrier Application. [J]. | ACS applied materials & interfaces , 2021 , 13 (19) : 23057-23066 . |
| MLA | Zhou Zheng et al. "Novel Fe-Based Amorphous Composite Coating with a Unique Interfacial Layer Improving Thermal Barrier Application." . | ACS applied materials & interfaces 13 . 19 (2021) : 23057-23066 . |
| APA | Zhou Zheng , Han Feng-Xi , Yao Hai-Hua , Li Yan-Ze , Yang Yan-Ge , Guo Xing-Ye et al. Novel Fe-Based Amorphous Composite Coating with a Unique Interfacial Layer Improving Thermal Barrier Application. . | ACS applied materials & interfaces , 2021 , 13 (19) , 23057-23066 . |
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Abstract ：
为满足马氏体不锈钢熔覆层的高效制备需求,在合金成分优化基础上,采用激光熔覆技术制备了单层厚度超过2 mm的FeCrNiMo合金熔覆层,并对其微观组织结构与摩擦磨损行为进行了研究。结果表明,熔覆层厚度均匀,无明显裂纹等缺陷,组织从表面沿厚度方向依次为等轴晶、树枝晶、胞状晶,枝晶内为马氏体,晶间为富Cr、Mo元素的铁素体。在环-块摩擦磨损形式下,随着施加载荷加大,摩擦系数和磨损量逐渐增加;熔覆层以磨粒磨损和氧化磨损机制为主,但在高载荷下黏着磨损倾向增大。在球盘往复摩擦磨损形式下,随温度升高,摩擦系数下降,熔覆层发生热软化,磨损量增加;熔覆层以氧化磨损和疲劳磨损机制为主。
Keyword ：
激光熔覆 激光熔覆 微观组织 微观组织 FeCrNiMo不锈钢 FeCrNiMo不锈钢 摩擦磨损 摩擦磨损
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| GB/T 7714 | 赵万新 , 周正 , 黄杰 et al. FeCrNiMo激光熔覆层组织与摩擦磨损行为 [J]. | 金属学报 , 2021 , 57 (10) : 1291-1298 . |
| MLA | 赵万新 et al. "FeCrNiMo激光熔覆层组织与摩擦磨损行为" . | 金属学报 57 . 10 (2021) : 1291-1298 . |
| APA | 赵万新 , 周正 , 黄杰 , 杨延格 , 杜开平 , 贺定勇 . FeCrNiMo激光熔覆层组织与摩擦磨损行为 . | 金属学报 , 2021 , 57 (10) , 1291-1298 . |
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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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Abstract ：
采用超音速火焰喷涂在铸铁表面制备了NiCrBSi喷涂涂层,以研究其在不同温度下的摩擦磨损行为.?采用pin-on-disc试验设备在室温和300?℃下对NiCrBSi涂层进行了摩擦磨损试验,分析了温度对NiCrBSi涂层摩擦系数和磨损率的影响规律;采用XRD和SEM对NiCrBSi喷涂态涂层进行了微观组织结构分析;通过SEM对涂层磨损样品的表面和截面进行了微观组织观察,探索涂层在不同温度下的磨损机制.?结果表明,NiCrBSi涂层结构致密,具有典型的喷涂层状结构,主要由γ-Ni相、Cr7C3相、Ni3B相和CrB相组成;孔隙率为1.11％,硬度为742?HV0.1?±24?HV0.1.?NiCrBSi涂层在室温下发生明显的粘滑现象,随着试验温度的升高,涂层的摩擦系数降低;升高的试验温度导致涂层硬度降低,涂层磨损率升高,耐磨性能下降.?涂层在室温及300?℃下的磨损机制由磨粒磨损和疲劳磨损组成,随着温度的升高,磨粒磨损越加严重.
Keyword ：
微观组织结构 微观组织结构 磨损机制 磨损机制 超音速火焰喷涂 超音速火焰喷涂 摩擦行为 摩擦行为
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| GB/T 7714 | 陈立佳 , 赵力东 , 王旭 et al. NiCrBSi超音速火焰喷涂层在不同温度下的磨损行为 [J]. | 焊接学报 , 2021 , 42 (5) : 65-70 . |
| MLA | 陈立佳 et al. "NiCrBSi超音速火焰喷涂层在不同温度下的磨损行为" . | 焊接学报 42 . 5 (2021) : 65-70 . |
| APA | 陈立佳 , 赵力东 , 王旭 , 周正 , 郭星晔 , 贺定勇 . NiCrBSi超音速火焰喷涂层在不同温度下的磨损行为 . | 焊接学报 , 2021 , 42 (5) , 65-70 . |
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