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摘要 ：
Al-Sn-Si alloys have been widely used as bearing alloys in automotive engines. In those alloys, beta(Sn) phase serves as the solid lubricant and Si particles are used to improve the hardness, fatigue resistance as well as seizure resistance. With the development of machinery, bearing alloys with higher load-carrying capacity and better tribological properties are demanded to meet the application under severe conditions. Adding appropriate Mg to the Al-Sn-Si alloy can effectively optimize the tribological properties. In this paper, the microstructure, mechanical properties and tribological properties of the Al-12Sn-4Si-xMg (x = 0, 0.5, 1, 1.5, all in wt.%) alloys were studied. The Al-12Sn-4Si-1.5 Mg alloy had the smallest grain size and more uniform microstructure than other specimens. The Al-12Sn-4Si-1.5 Mg alloy showed significantly better wear resistance than the Al-12Sn-4Si alloy at 2 N-70 N. The volume wear rates and friction coefficients at 15 N-70 N were lower than those at 2 N-8 N. The evolution of volume wear rate and friction coefficient with load was related to the evolution of tribolayer with load. The wear mechanism of the alloys was mainly oxidation wear, adhesive wear and fatigue wear, accompanied with abrasive wear. (c) 2022 The Authors. 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/).
关键词 ：
Dry sliding wear Dry sliding wear Tribolayer Tribolayer Tribology Tribology Al-Sn-Si alloy Al-Sn-Si alloy
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| GB/T 7714 | Wang, Dongmei , Wu, Xiaolan , Gao, Kunyuan et al. Study on the microstructure and wear behavior of Mg-containing Al-12Sn-4Si alloys [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2022 , 18 : 338-351 . |
| MLA | Wang, Dongmei et al. "Study on the microstructure and wear behavior of Mg-containing Al-12Sn-4Si alloys" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 18 (2022) : 338-351 . |
| APA | Wang, Dongmei , Wu, Xiaolan , Gao, Kunyuan , Wen, Shengping , Wu, Hong , Qiu, Jingwen et al. Study on the microstructure and wear behavior of Mg-containing Al-12Sn-4Si alloys . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2022 , 18 , 338-351 . |
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摘要 ：
To obtain excellent mechanical properties, Al-Mg alloy was processed through a combination of equal channel angular pressing (ECAP) and micro-alloying techniques. In this study, the microstructural evolution of Al-Mg-ErZr alloy during ECAP at room temperature were systematically investigated. TEM results confirm that the Al3(Er, Zr) particle exists in the initial material and saturated dislocations form dense dislocation walls. The grains were refined with an average grain size of 2.8 mu m after 4 passes of ECAP. Continuous dynamic recrystallization was identified and this mechanism led to the formation of fine grain structure. The (101)-oriented coarse grains were relatively stable once they had been formed.
关键词 ：
Metals and alloys Metals and alloys Mechanical properties Mechanical properties Al-3(Er, Zr) particle Al-3(Er, Zr) particle Microstructure Microstructure Dislocation Dislocation Al-Mg-Er-Zr alloy Al-Mg-Er-Zr alloy
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| GB/T 7714 | Xue, Da , Wei, Wu , Wen, Shengping et al. Microstructural evolution of Al-Mg-Er-Zr alloy by equal channel angular extrusion at room temperature [J]. | MATERIALS LETTERS , 2022 , 334 . |
| MLA | Xue, Da et al. "Microstructural evolution of Al-Mg-Er-Zr alloy by equal channel angular extrusion at room temperature" . | MATERIALS LETTERS 334 (2022) . |
| APA | Xue, Da , Wei, Wu , Wen, Shengping , Wu, Xiaolan , Shi, Wei , Zhou, Xiaorong et al. Microstructural evolution of Al-Mg-Er-Zr alloy by equal channel angular extrusion at room temperature . | MATERIALS LETTERS , 2022 , 334 . |
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摘要 ：
The effect of grain morphology and precipitates on mechanical properties and corrosion behavior of two commercial 7N01 alloys was studied using transmission electron microscopy (TEM) and scanning electron microscopy (SEM) equipped with electron backscatter diffraction (EBSD). Results showed that the recrystallization degree of the outer surface of 7N01-I alloy was lower than that of 7N01-II alloy. The main strengthening precipitates of two alloys were mainly eta' phases. The grain boundary precipitates (GBPs) of 7N01-I alloy distributed discontinuously, while those of 7N01-II alloy distributed continuously. The strength of two 7N01 alloys was similar, but the maximum corrosion depth of 7N01-I alloy was less than that of 7N01-II alloy, because the discontinuous GBPs and the lower recrystallization degree of outer surface of 7N01-I alloy were favorable for improving corrosion behavior. Different models of strengthening mechanism were discussed, and the corrosion behavior was correlated with microstructure.
关键词 ：
& nbsp;7N01 alloys & nbsp;7N01 alloys corrosion behavior corrosion behavior microstructure microstructure mechanical properties mechanical properties
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| GB/T 7714 | Zhao, Pei-hao , Wu, Xiao-lan , Liu, Yang et al. Microstructure, mechanical properties and corrosion behavior of commercial 7N01 alloys [J]. | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA , 2022 , 32 (3) : 778-789 . |
| MLA | Zhao, Pei-hao et al. "Microstructure, mechanical properties and corrosion behavior of commercial 7N01 alloys" . | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 32 . 3 (2022) : 778-789 . |
| APA | Zhao, Pei-hao , Wu, Xiao-lan , Liu, Yang , Gao, Kun-yuan , Wen, Sheng-ping , Wei, Wu et al. Microstructure, mechanical properties and corrosion behavior of commercial 7N01 alloys . | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA , 2022 , 32 (3) , 778-789 . |
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摘要 ：
The production of freshwater by desalination has great significance. Membrane distillation (MD) is considered as a promising technique for desalination. As a popular candidate for MD desalination, FAS (fluoroalkylsilane)-modified ceramic membrane suffers from insufficient stability, such as membrane wetting and decline of salt rejection during long-term operation, because of the degradation of hydrophobicity. In the present work, a novel strategy is proposed to enhance the long-term desalination stability of FAS-modified cordierite ceramic mem-branes by constructing a porous SiO2@PDMS (polydimethylsiloxane) protective layer on their tops to obtain a robust hydrophobic property. The results show that such a layer can be successfully fabricated by a two-step spraying method with hydrosoluble NaCl particles as templates. The incorporation of SiO2 nanoparticles into PDMS generates a loose and porous structure in the layer and renders an enhanced hydrophobicity. At a SiO2/PDMS mass ratio of 0.30, the membranes exhibit a notable resistance to both mechanical abrasion and chemical corrosion. The dissolution of NaCl templates leaves behind cavities within the layer, which prevents the SiO2/PDMS species from blocking the membrane pores and thereby helps to reduce the vapor transport resistance. These membranes are highly stable upon long-term desalination (> 300 h) and can preserve a stable water flux of 8.10 kg/m(2)h and a salt rejection close to 100% under the following conditions: a feed temperature of 80 ?degrees C, a NaCl concentration of 3.5 wt% and a feed flow rate of 300 mL/min. The SiO2@PDMS layer is responsible for the outstanding desalination stability since it prevents membrane wetting by reducing the direct contact of the reflux feed solution to the underlying cordierite ceramic membranes.
关键词 ：
Spraying Spraying Hydrophobicity Hydrophobicity PorousSiO(2)@PDMS layer PorousSiO(2)@PDMS layer Ceramic membrane Ceramic membrane Desalination stability Desalination stability Membrane distillation desalination Membrane distillation desalination
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| GB/T 7714 | Dai, Xue , Wei, Qi , Wang, Yali et al. A novel strategy to enhance the desalination stability of FAS (fluoroalkylsilane)-modified ceramic membranes via constructing a porous SiO2@PDMS (polydimethylsiloxane) protective layer on their top [J]. | CHEMICAL ENGINEERING JOURNAL , 2022 , 435 . |
| MLA | Dai, Xue et al. "A novel strategy to enhance the desalination stability of FAS (fluoroalkylsilane)-modified ceramic membranes via constructing a porous SiO2@PDMS (polydimethylsiloxane) protective layer on their top" . | CHEMICAL ENGINEERING JOURNAL 435 (2022) . |
| APA | Dai, Xue , Wei, Qi , Wang, Yali , Li, Qunyan , Cui, Suping , Nie, Zuoren . A novel strategy to enhance the desalination stability of FAS (fluoroalkylsilane)-modified ceramic membranes via constructing a porous SiO2@PDMS (polydimethylsiloxane) protective layer on their top . | CHEMICAL ENGINEERING JOURNAL , 2022 , 435 . |
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摘要 ：
纳米氧化钨作为一种具有独特物理化学性质的半导体功能材料,已被广泛应用于环境、能源、生命科学、信息技术等领域。本文基于第一性原理计算在纳米氧化钨中的应用进展,概述了量子力学基础上的第一性原理及密度泛函理论的发展历程及基本理论,介绍了该领域常用的MS (Materials studio)、VASP (Vienna ab initio simulation package)等模拟计算软件,并分类阐述了第一性原理计算对氧化钨的微观电子结构、物质相互作用、分子热动力学等方面的研究成果。最后提出了第一性原理计算在纳米氧化钨这类半导体材料研究中存在的问题及未来发展趋势。
关键词 ：
电子结构 电子结构 第一性原理 第一性原理 综述 综述 模拟计算 模拟计算 纳米氧化钨 纳米氧化钨
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| GB/T 7714 | 赵林艳 , 刘阳思 , 席晓丽 et al. 基于第一性原理计算的纳米氧化钨研究进展 [J]. | 无机材料学报 , 2021 , (11) : 1125-1136 . |
| MLA | 赵林艳 et al. "基于第一性原理计算的纳米氧化钨研究进展" . | 无机材料学报 11 (2021) : 1125-1136 . |
| APA | 赵林艳 , 刘阳思 , 席晓丽 , 马立文 , 聂祚仁 . 基于第一性原理计算的纳米氧化钨研究进展 . | 无机材料学报 , 2021 , (11) , 1125-1136 . |
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摘要 ：
对Al-Cu-Li-(Yb)合金的均匀化退火过程微观结构的研究是设计高强铝锂合金及其时效处理的基础.采用金相显微镜(OM)、差热分析(DSC)、X射线衍射(XRD)、扫描电镜(SEM)和能谱(EDS),研究了Al-1.2Cu-3.5Li-(0.02 Yb)合金多级均匀化工艺及均匀化过程中微观组织的演变.结果 表明:合金铸态组织存在晶界沿晶和晶内球形一次相,以及枝晶偏析,其中Al-1.2Cu-3.5Li合金析出相由Al7Cu4Li、Al2CuLi和AlCuFe组成,Al-1.2Cu-3.5Li-0.02Yb合金析出相由Al7Cu4Li、Al2CuLi、Al2Cu和AlCuYb组成.为了让析出相尽可能的回溶,同时避免过烧,Al-1.2Cu-3.5Li和Al-1.2Cu-3.5Li-0.02Yb合金分别设计了500℃12 h+550℃12 h两级均匀化和500℃12 h +560℃12 h +580℃12 h三级均匀化退火.均匀化退火后枝晶偏析基本消除,晶界相和晶内球形相部分回溶.值得注意的是,球形相回溶后,分解为多个细小的球形颗粒,对于Al-1.2Cu-3.5Li合金和Al-1.2Cu-3.5Li-0.02Yb合金,残留相分别为AlCuFe和AlCuYb相.
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| GB/T 7714 | 马永放 , 高坤元 , 丁宇升 et al. Al-1.2Cu-3.5Li-(0.02Yb)合金多级均匀化退火工艺及其显微组织研究 [J]. | 轻合金加工技术 , 2021 , 49 (9) : 15-21,32 . |
| MLA | 马永放 et al. "Al-1.2Cu-3.5Li-(0.02Yb)合金多级均匀化退火工艺及其显微组织研究" . | 轻合金加工技术 49 . 9 (2021) : 15-21,32 . |
| APA | 马永放 , 高坤元 , 丁宇升 , 文胜平 , 黄晖 , 聂祚仁 . Al-1.2Cu-3.5Li-(0.02Yb)合金多级均匀化退火工艺及其显微组织研究 . | 轻合金加工技术 , 2021 , 49 (9) , 15-21,32 . |
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摘要 ：
研究了Cu含量对Al-2.5Mg-xCu-0.2Si合金微观组织和性能的影响.结果表明:由于形成Cu、Mg原子团簇,加入Cu的合金的显微硬度在时效初期有明显的快速硬化.随着时效时间的延长,由于S''相和GPB的形成使得合金的硬度再次提高,并达到硬度峰值.快速硬化的硬度值和峰值硬度值均随铜含量的增加而增加.铜含量增高,合金的抗拉强度和屈服强度增加明显,延伸率降低.含铜量增高,合金的抗晶间腐蚀能力变差.当Cu含量低于1.14％(质量分数,下同)时,合金具有良好的抗晶间腐蚀性能;但含铜2.10％的合金抗晶间腐蚀性能显著降低.实验结果表明:含铜量为1.14％的合金具有较好的机械性能和抗腐蚀能力.
关键词 ：
铜含量 铜含量 腐蚀 腐蚀 强度 强度 热处理 热处理
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| GB/T 7714 | 李渤 , 文胜平 , 苏美华 et al. Cu含量对Al-2.5Mg-xCu-0.2Si合金微观组织和性能的影响 [J]. | 稀有金属材料与工程 , 2021 , 50 (3) : 740-745 . |
| MLA | 李渤 et al. "Cu含量对Al-2.5Mg-xCu-0.2Si合金微观组织和性能的影响" . | 稀有金属材料与工程 50 . 3 (2021) : 740-745 . |
| APA | 李渤 , 文胜平 , 苏美华 , 王为 , 黄晖 , 高坤元 et al. Cu含量对Al-2.5Mg-xCu-0.2Si合金微观组织和性能的影响 . | 稀有金属材料与工程 , 2021 , 50 (3) , 740-745 . |
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摘要 ：
Effect of Cu content on microstructure and properties of Al-2.5Mg-xCu-0.2Si alloys was investigated in this research. Results show that the microhardness of the alloy with Cu addition has an obvious rapid hardening effect due to the clustering of Cu and Mg at the early stage of aging. With further aging, the microhardness of the alloy increases again and reaches an obvious second peak due to the formation of S' phase and Guinier-Preston-Bagaryasky (GPB) zone. The increasing amount of Cu content results in a significant increase in tensile strength and yield strength while a reduction of elongation and intergranular corrosion performance. With the increase of Cu content, the intergranular corrosion performance of the alloy becomes worse. The alloy has a reasonably well corrosion performance when the Cu content is less than 1.14wt%. However, there is a significant reduction when the alloy contains 2.10wt% Cu. Based on these results, the alloy containing 1.14wt% Cu has better mechanical properties and corrosion resistance. Copyright © 2021, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.
关键词 ：
Textures Textures Aluminum alloys Aluminum alloys Silicon alloys Silicon alloys Tensile strength Tensile strength Corrosion resistant alloys Corrosion resistant alloys Magnesium alloys Magnesium alloys Microhardness Microhardness Corrosion resistance Corrosion resistance Copper corrosion Copper corrosion Intergranular corrosion Intergranular corrosion
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| GB/T 7714 | Li, Bo , Wen, Shengping , Su, Meihua et al. Effect of Cu Content on Microstructure and Properties of Al-2.5Mg-xCu-0.2Si Alloy [J]. | Rare Metal Materials and Engineering , 2021 , 50 (3) : 740-745 . |
| MLA | Li, Bo et al. "Effect of Cu Content on Microstructure and Properties of Al-2.5Mg-xCu-0.2Si Alloy" . | Rare Metal Materials and Engineering 50 . 3 (2021) : 740-745 . |
| APA | Li, Bo , Wen, Shengping , Su, Meihua , Wang, Wei , Huang, Hui , Gao, Kunyuan et al. Effect of Cu Content on Microstructure and Properties of Al-2.5Mg-xCu-0.2Si Alloy . | Rare Metal Materials and Engineering , 2021 , 50 (3) , 740-745 . |
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摘要 ：
一种含Er铸造耐热Al‑Si‑Cu‑Mg合金，属于有色金属材料领域。本发明合金特点之一是：合金在调整Al‑Si‑Cu‑Mg合金中合金元素质量比的同时加入Er元素。热处理工艺，其中采用三级固溶处理，第一级固溶能使铸态合金中的过饱和Er元素以Al3Er的形式析出，其尺寸大小为5～10nm，第二级固溶能使低熔点的金属间化合物在不过烧的前提下回溶进基体，第三极固溶能使合金中的大部分粗大一次相回溶进基体。三级固溶相比传统的单级固溶对于Al‑Si‑Cu‑Mg合金的室温和高温力学性能有较大的的提高。本发明的合金和热处理工艺使合金具有优良的室温拉伸性能，良好的高温拉伸性能。
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| GB/T 7714 | 黄晖 , 代钊 , 荣莉 et al. 一种含Er铸造耐热Al-Si-Cu-Mg合金 : CN202110122139.3[P]. | 2021-01-28 . |
| MLA | 黄晖 et al. "一种含Er铸造耐热Al-Si-Cu-Mg合金" : CN202110122139.3. | 2021-01-28 . |
| APA | 黄晖 , 代钊 , 荣莉 , 魏午 , 高坤元 , 文胜平 et al. 一种含Er铸造耐热Al-Si-Cu-Mg合金 : CN202110122139.3. | 2021-01-28 . |
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摘要 ：
向不同镁含量的Al-Mg-Cu合金中添加Si元素,研究Si对该合金时效强化行为的影响,并在此基础上探究自然时效处理对合金后续人工时效行为的影响.研究结果表明,在2.0％Mg的基础上添加0.15 wt％Si可以显著增强合金的人工时效强化效果,但是合金强度随Si含量的进一步增加而增加的幅度较小;Si对合金的时效强化效果是由于Si使得合金中的时效析出相明显细化且分布弥散.添加0.15％S i的合金在经过自然时效后再进行人工时效(简称双时效),经双时效后的人工时效前期的硬度值高于直接人工时效的硬度值,但两种时效工艺峰值硬度基本相同;然后若继续增加Si含量,合金经双时效后的硬度峰值低于直接人工时效所得的硬度值.
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| GB/T 7714 | 袁晓明 , 张二庆 , 文胜平 et al. Si对Al-Mg-Cu合金时效析出行为的影响 [J]. | 材料科学与工程学报 , 2021 , 39 (3) : 466-470,509 . |
| MLA | 袁晓明 et al. "Si对Al-Mg-Cu合金时效析出行为的影响" . | 材料科学与工程学报 39 . 3 (2021) : 466-470,509 . |
| APA | 袁晓明 , 张二庆 , 文胜平 , 梁上上 , 王为 , 聂祚仁 . Si对Al-Mg-Cu合金时效析出行为的影响 . | 材料科学与工程学报 , 2021 , 39 (3) , 466-470,509 . |
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