Physics and Chemistry of Materials Treatment最新文献_第10页

Effect of the melt cooling rate on the structural-phase state of the Al – Si alloy doped with metals 熔体冷却速率对掺杂金属铝硅合金组织相态的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2023-3-63-71

V. Shepelevich, O. Gusakova, S. V. Husakova

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Modification of the structural and phase composition and mechanical properties of the Ti – C60 – Ti films implanted by boron ions 硼离子注入对Ti - C60 - Ti薄膜结构、相组成及力学性能的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-3-5-13

L. Baran

{"title":"Modification of the structural and phase composition and mechanical properties of the Ti – C60 – Ti films implanted by boron ions","authors":"L. Baran","doi":"10.30791/0015-3214-2022-3-5-13","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-3-5-13","url":null,"abstract":"Changes in the structure, phase composition, and mechanical properties of Ti – C60 – Ti films implanted with B+ ions (E = 80 keV, D = 1 1016 ion/cm2) after annealing in vacuum at temperature 570 K (3 hours) were studied by the methods of atomic force microscopy, X-ray diffraction and nanoindentation. The films were obtained by resistive evaporation in vacuum. Layers of titanium and C60 fullerite were sequentially deposited onto a substrate of oxidized single-crystal silicon. It has been established that during the condensation of the fullerite layer (h = 250 nm) on the underlying titanium layer (h = 120 nm), and then the titanium layer (h = 150 nm) on the fullerite layer, intense diffusion of titanium into the fullerite layer occurs. Implantation of titanium-fullerite-titanium films with boron ions leads to mixing of titanium and fullerite layers, while the size of structural elements increases in comparison with non-implanted films from 40 nm to 80 nm. Auger electron spectroscopy revealed that ion implantation results in an increase in the atomic fraction of oxygen in the films and the formation of a new TixOyC60 phase, which leads to an increase in the nanohardness of the mixed layers. The implanted Ti – C60 – Ti films were annealed in vacuum at T= 570 K for t = 3 h. Thermal annealing results in recrystallization of the fullerite phase and intensive growth of a new TixOyC60 phase with improved mechanical properties.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129806650","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}

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Thermodynamic functions of the reactions of anodic oxidation of niobium and tantalum 铌钽阳极氧化反应的热力学函数

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-5-36-41

A. S. Kamysheva, A. I. Koroleva, L. P. Mileshko

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Porous composite coatings for implants 植入物用多孔复合涂层

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-3-49-59

V. Sokolov, O. Razgulina, M. Chernov, V. Mamaeva, A. I. Mamaev, V. I. Kalita, D. I. Komlev, A. Radyuk

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Damage of niobium by pulse flows of helium ions and helium plasma 氦离子和氦等离子体脉冲流对铌的损伤

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-6-5-17

V. N. Pimenov, I. Borovitskaya, A. S. Demin, N. A. Epifanov, S. Latyshev, S. A. Maslyaev, E. Morozov, I. P. Sasinovskaya, G. Bondarenko, A. I. Gajdar

{"title":"Damage of niobium by pulse flows of helium ions and helium plasma","authors":"V. N. Pimenov, I. Borovitskaya, A. S. Demin, N. A. Epifanov, S. Latyshev, S. A. Maslyaev, E. Morozov, I. P. Sasinovskaya, G. Bondarenko, A. I. Gajdar","doi":"10.30791/0015-3214-2021-6-5-17","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-6-5-17","url":null,"abstract":"The damageability of niobium by pulsed fluxes of helium ions (HI) and helium plasma (HP) in the Plasma Focus (PF) setup was studied at a flux power density qi ~ 108 W/cm2 and qp ~ 107 W/cm2, respectively, and pulse duration τi ≈ 30 – 50 ns and τp ≈ 100 ns. In the implemented irradiation conditions the erosion of the material is observed associated with the evaporation of the surface layer (SL), which occurs somewhat more intensively in the central part of the irradiation zone under the action of the most high-energy fluxes of HI and HP. The typical features of the damageability of the niobium SL under the considered irradiation conditions are revealed. These include: melting of SL with the formation of a wavy surface relief and a large number of blisters of two types — gas-filled and with destroyed shells, as well as the presence of microcracks. The appearance of blisters was associated with the formation of complexes based on the combination of implanted helium atoms with vacancies and interstitial impurity atoms (C, O, N, etc.) and their subsequent growth and coagulation in the liquid phase under pulsed action of energy fluxes on the irradiated Nb surface. Some of the microcracks formed in the SL under the action of thermal stresses coincide with the sliding lines of the material that arise under the action of high-speed plastic deformation. A network of such microcracks creates a block structure on the Nb surface. In the irradiated surface layer of niobium, zones of columnar crystals and a cellular microstructure of the surface are found, in which the average cell size is ~ 100 nm. It was shown by the method of numerical simulation that in the indicated zones the process of solidification of the SL proceeded through directional crystallization at a high speed, which reached ~ 35 m/s near the irradiated surface.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123552391","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}

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Effect of the temperature and heating rate modes on the microstructure and mechanical properties of aluminum oxide: analysis of Spark Plasma Sintering mechanisms 温度和升温速率模式对氧化铝微观组织和力学性能的影响:放电等离子烧结机理分析

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2023-1-11-36

M. Boldin, A. Popov, А. Nokhrin, V. Chuvil’deev, A. Murashov, G. V. Sherbak, N. Tabachkova

{"title":"Effect of the temperature and heating rate modes on the microstructure and mechanical properties of aluminum oxide: analysis of Spark Plasma Sintering mechanisms","authors":"M. Boldin, A. Popov, А. Nokhrin, V. Chuvil’deev, A. Murashov, G. V. Sherbak, N. Tabachkova","doi":"10.30791/0015-3214-2023-1-11-36","DOIUrl":"https://doi.org/10.30791/0015-3214-2023-1-11-36","url":null,"abstract":"The effect of temperature and heating rate on the shrinkage kinetics of submicron and fine-dispersed aluminum oxide powders was investigated. The objects of the study were (1) submicron powder α-Al2O3, (2) submicron powder α-Al2O3 with an amorphous layer on the particle surface, (3) fine powder α-Al2O3. Ceramic samples were obtained by spark plasma sintering (SPS). Based on a comparison of powders (1) and (2) of the same dispersity the influence of the amorphous layer on the sintering kinetics was analyzed. Based on the comparison of powders (1) and (3) the effect of the initial particle size on the shrinkage kinetics was analyzed. Shrinkage curves were analyzed using the Young-Cutler model and the Coble model. It is shown that the sintering kinetics of submicron powders is determined by the intensity of the grain boundary diffusion process, and of fine powders by simultaneously proceeding processes of volume and grain boundary diffusion. It was found that the presence of an amorphous layer on the surface of submicron α-Al2O3 powder influences the grain boundary rate and the parameters of the Coble equation at the final stage of SPS. It was suggested that the abnormal characteristics of ceramics SPSed from submicron powder with an surface amorphous layer are related to the presence of an increased density of defects and excess free volume on the grain boundaries formed in the process of crystallization of the amorphous layer.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122881984","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}

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Peculiarities of a solid-phase method for the Al-Fe/SiO2 and Al-Co/SiO2 powder catalysts production 固相法制备Al-Fe/SiO2和Al-Co/SiO2粉末催化剂的特点

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-3-63-68

V. Artyukh, V. N. Borsch, V. Yusupov, S. Zhuk, V. Zelensky, G. Lazarenko, B. Belelyubsky

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Development of technology for dissolving a homogeneous mixture of oxides of uranium and plutonium obtained by plasma-chemical method 发展溶解等离子体化学法获得的铀和钚氧化物均质混合物的技术

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-3-18-26

N. Dedov, S. B. Tochilin, Y. Tumanov, A. N. Zhiganov, Siberian Chemical Combine

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Effect of the pulsed nanosecond laser irradiation on the corrosion resistance of magnesium Mg-Al-Zn alloy 脉冲纳秒激光辐照对Mg-Al-Zn镁合金耐腐蚀性能的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-6-28-35

S. Bozhko, S. Manokhin, A. Tokmacheva-Kolobova, Y. Karlagina, A. Ligachev

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Determination of temperature regimes for annealing of ferromagnetic amorphous wires obtained by the Ulitovsky – Taylor method during heating by direct current flow 直流电加热时用乌里托夫斯基-泰勒法获得的铁磁非晶丝退火温度的测定

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-2-71-78

V. Molokanov, A. V. Krutilin, N. A. Palii, T. R. Chueva, P. Umnov

{"title":"Determination of temperature regimes for annealing of ferromagnetic amorphous wires obtained by the Ulitovsky – Taylor method during heating by direct current flow","authors":"V. Molokanov, A. V. Krutilin, N. A. Palii, T. R. Chueva, P. Umnov","doi":"10.30791/0015-3214-2022-2-71-78","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-2-71-78","url":null,"abstract":"The direct current (dc) heating effect of ferromagnetic amorphous wires (AW) on the electromagnetic properties of the serial Co-based alloy, Co – Fe – Cr – Si – B, is investigated. The Ulitovsky – Taylor method was used to produce AW with diameters D = 40, 70, 82, 98, 123, and 145 μm in a glass shell, that was removed mechanically by elastic bending on a laboratory bench. The developed in situ method of stepwise cyclic dc heating of AW of various diameters enables to choose the optimal values of the current (Ia) for carrying out the selected modes that maximize the magnetic properties. AW electromagnetic properties were monitored by registering the amplitude of the intrinsic electromagnetic signal of electromotive force (EMF) of the AW sample under study. Since reliable direct measurements of AW temperature (Ta) when passing the current (Ia) quite an undertakings, we used indirect method of AW heating temperature estimation by establishing the relationship Ta = f (Ia). For the AW specified diameters, the direct current values were experimentally determined, which ensure optimal heat treatment in the range of temperature stability of the amorphous phase, up to the crystallization temperature, Tx. A calibration curve was constructed using reference temperature points, i.e. Tx and the Curie temperature (Tc). The proposed technique for calibration graph construction I = f(D) may be used for different AWs that have different diameters and same composition; it allows one to determine the modes of current annealing required for the best EMF amplitude values of amorphous wires of the given diameter, up to 100 μm.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129191349","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}

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