Letters on Materials最新文献_第5页

Optical and electrical properties of a new complex oxide Pb1 / 3Na1 / 3K1 / 3Ta2 / 3Fe1 / 3O3-δ with perovskite structure 一种新型复合氧化物Pb1的光电性质 / 3Na1 / 3K1 / 3Ta2 / 3Fe1 / 钙钛矿结构的3O3-δ

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-367-372

N. Zhuk, A. Popov, R. Korolev, Viktor Moroz, A. Selyutin, A. Koroleva, N. Sekushin, B. Makeev

引用次数: 0

Experience in obtaining laminated aluminum composites by asymmetric accumulative roll bonding 通过不对称累积卷接获得层压铝复合材料的经验

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-373-378

O. Biryukova, A. Pesin, D. Pustovoitov

引用次数: 1

The effect of alloying and fluorination on the oxidation behavior of β-solidifying γ-TiAl based alloys 合金化和氟化对β-凝固γ-TiAl基合金氧化行为的影响

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-343-349

L. Shaikhutdinova, V. Imayev, D. Trofimov, R. Imayev

引用次数: 1

Impact fracture characteristics of multilayer laminate based on near-alpha titanium alloy 近α钛合金多层层合板的冲击断裂特性

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-499-503

A. Sarkeeva

引用次数: 0

Effect of strain of cryorolling on structure and strength of nickel 冷轧应变对镍组织和强度的影响

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-409-413

M. Markushev, I. Valeev, E. Avtokratova, R. Ilyasov, A. Valeeva, S. Krimsky, O. Sitdikov

引用次数: 1

Study of the Pt-rich nanostructured FePt and CoPt alloys: oddities of phase composition 富pt纳米结构FePt和CoPt合金的研究:相组成的异同

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-480-485

N. Zakharov, Irina Tikhonova, Yuri Zakharov, A. Popova, V. Pugachev, D. Russakov

引用次数: 1

Superplastic forming of titanium alloys at 700°C 钛合金在700℃下的超塑性成形

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-332-335

M. Shagiev, A. Kruglov, O. Rudenko, M. Murzinova

引用次数: 0

Structure and electrical potential of calcium phosphate coatings modified with aluminum oxyhydroxide nanoparticles 氢氧化铝纳米颗粒改性磷酸钙涂层的结构和电势

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-336-342

V. Chebodaeva, M. Sedelnikova, A. Kashin, O. Bakina, I. Khlusov, A. Zharin, V. Egorkin, I. Vyaliy, Y. Sharkeev

{"title":"Structure and electrical potential of calcium phosphate coatings modified with aluminum oxyhydroxide nanoparticles","authors":"V. Chebodaeva, M. Sedelnikova, A. Kashin, O. Bakina, I. Khlusov, A. Zharin, V. Egorkin, I. Vyaliy, Y. Sharkeev","doi":"10.22226/2410-3535-2022-4-336-342","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-336-342","url":null,"abstract":"The effect of the introduction of charged aluminum oxyhydroxide (AO) nanoparticles into the porous coatings from calcium phosphate formed by micro-arc oxidation on their electrical potential and structure was studied. The modification resulted in changes in the morphology and elemental composition of the coatings. The selection of coating functionalization parameters resulted in obtaining homogeneously distributed aluminum oxyhydroxide nanoparticles in the form of agglomerates, providing the maximum change in the electrical potential of the coatings. An increase in the duration of ultrasonic dispersion (USD) of initial AlN powder suspension from 10 to 60 min and an increase in the surface roughness of the coatings, parameter R a , from 3.5 to 5.5 µm led to an increase in the surface electrical potential from −85 to −35 mV. At the same time, the aluminum content in the coating decreased from 3 to 1 at.% with an increase in the duration of USD of the AlN powder suspension from 10 to 60 minutes. The introduction of aluminum oxyhydroxide nanoparticles into the coating contributed to an improvement in corrosion properties, namely, an increase in the corrosion potential from 0.1 to 0.2 mV and a decrease in the corrosion current from 2.5 ∙10 −9 to 1.1·10 −9 A ∙ cm 2 .","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44656192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effect of the morphology of films of polyaniline derivatives poly-2-[(2E)-1‑methyl-2‑butene-1‑yl]aniline and poly-2-(cyclohex-2‑en-1‑yl)aniline on sensory sensitivity to humidity and ammonia vapors 聚苯胺衍生物聚-2-[（2E）-1-甲基-2-丁烯-1-基]苯胺和聚-2-（环己-2-烯-1-基）苯胺膜的形态对湿度和氨蒸汽感官敏感性的影响

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-309-315

R. Salikhov, I. Mullagaliev, B. Badretdinov, Anastasia Ostaltsova, T. Sadykov, A. Mustafin

引用次数: 2

Simulation of deformation and growth during surfacing of aluminum bronze nanograins 铝青铜纳米晶粒堆焊过程中的变形和生长模拟

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Letters on Materials Pub Date : 2022-12-01 DOI: 10.22226/2410-3535-2022-4-354-359

A. Nikonov, D. Lychagin, A. Bibko, O. Novitskaya

{"title":"Simulation of deformation and growth during surfacing of aluminum bronze nanograins","authors":"A. Nikonov, D. Lychagin, A. Bibko, O. Novitskaya","doi":"10.22226/2410-3535-2022-4-354-359","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-354-359","url":null,"abstract":"In additive manufacturing, it is important to determine the technological and structural factors that control the crystallization process and specify the required structure of the product. The crystallization structure is affected by the parameters of the starting material and the crystallization conditions. Using the orientation of the grains of the substrate, which is formed after electron-beam surfacing of aluminum bronze, the modeling parameters were set by the molecular dynamics simulation. The process of deformation of three adjacent grains under constrained conditions and structural changes in the process of interaction with a melt drop and subsequent crystallization were considered. An analysis of grain deformation made it possible to reveal the role of geometric shear stress concentrators and to determine the significance of constrained conditions for deformation of polycrystal grains. It has been established that under the influence of a drop of melt, stacking faults are the least thermally stable, and twins are the most stable. The crystallographic orientation of the crystallizing grains coincides with the orientation of the substrate grains. During crystallization, columnar grains continue to grow, in which stacking faults and twins are formed.","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":"125 ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41282414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1