Electrodeposition of supersaturated aluminum-based solid solutions for maximizing strength and corrosion resistance

电沉积过饱和铝基固溶体，以最大限度地提高强度和耐腐蚀性

基本信息

批准号：
22K14508
负责人：
張澤磊
金额：
$ 2.91万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Early-Career Scientists
财政年份：
2022
资助国家：
日本
起止时间：
2022-04-01 至 2024-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K14508/
关键词：
Electrodeposition Aluminum alloy Mechanical property Corrosion resistance Ionic liquid

项目摘要

Aluminum (Al) strengthened through alloying followed by the deformation and/or aging is inherently subject to the conflict between strength and corrosion resistance due to coarse intermetallic particles (IMPs) in α-Al matrix. Accordingly, supersaturated solid solutions with a homogenous microstructure are proposed to defeat that conflict.In the first stage of this research, the Al(Fe) supersaturated solid solutions have been obtained using typical 1-ethyl-3-methylimidazolium chloride ([EMIm]Cl)－aluminum chloride (AlCl3) ionic liquids (ILs), where the coordination of dissolving Fe2+ have been clarified by spectroscopies together with ab initio calculation. The TEM and XRD demonstrated that Fe (1.5－14.1 at.%) could completely dissolve into α-Al matrix, and its contents were controlled via iron(II) chloride (FeCl2) concentrations in baths. Especially, these Al(Fe) alloys with higher Fe solid solubility prove to attain a simultaneous improvement in hardness and pitting corrosion resistance based on nanoindentation and cyclic polarization curves respectively.In addition, our newly developed quaternary phosphonium-based ILs ([P14,6,6,6]Cl－AlCl3) could give Al(Si, 3－6 at.%) supersaturated solid solutions at room temperature, while their properties including hardness and corrosion resistance require further studies.

铝（Al）通过合金加强，然后通过变形和/或衰老固有地构成由于α-AL基质中粗大的金属间颗粒（IMP）引起的强度和耐腐蚀性之间的冲突。根据这项研究的第一阶段，使用典型的1-乙基-3-甲基-3-甲基咪唑氯化物（[EMIM] CL） - 氯化铝（ALCL3）离子液体（ILS）获得了AL（Fe）超饱和固体溶液（ILS），并在其中阐明了溶解FE2+的配位，并通过Spectroscopies classiet carcountion callio carliate carlios abroscopies。 TEM和XRD证明Fe（1.5-14.1 at。％）可以完全溶于α-AL基质，其含量通过浴中的铁（II）氯化铁（II）氯化物（FECL2）浓度控制。尤其是，这些具有较高Fe固体溶液的Al（Fe）合金证明，基于纳米压力和环状极化曲线的硬度和固定耐药性可以简单改善。此外，我们新开发的基于四磷的ILS的IL（[P14,6,6,6,6,6] Cl-Allcl3）可以使Al（perpers actutions acter sore for Al（sepers clpers）固定（severs anders semets in。包括硬度和耐腐蚀性在内的特性需要进一步研究。