Physics and Chemistry of Materials Treatment最新文献_第4页

Study of high-speed sintering of fine-grained hard alloys based on tungsten carbide with ultralow cobalt content. III. Effect of C content on sintering kinetics of the nanopowders 超低钴含量碳化钨基细晶硬质合金高速烧结研究。3C含量对纳米粉体烧结动力学的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-2-35-54

Е. Lantsev, N. Malekhonova, V. Chuvil’deev, А. Nokhrin, Y. Tsvetkov, Yu. V. Blagoveshchenskiy, M. Boldin, N. Isaeva, P. Andreev, K. Smetanina

{"title":"Study of high-speed sintering of fine-grained hard alloys based on tungsten carbide with ultralow cobalt content. III. Effect of C content on sintering kinetics of the nanopowders","authors":"Е. Lantsev, N. Malekhonova, V. Chuvil’deev, А. Nokhrin, Y. Tsvetkov, Yu. V. Blagoveshchenskiy, M. Boldin, N. Isaeva, P. Andreev, K. Smetanina","doi":"10.30791/0015-3214-2022-2-35-54","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-2-35-54","url":null,"abstract":"The features of high-speed spark plasma sintering (SPS) of plasma-chemical nanopowders WC – (0.3, 0.6, 1) wt. % Co with the addition of 0.3 and 0.5 wt. % graphite were studied. The structural features of the ultralow-cobalt hard alloys with graphite addition during SPS are due to the simultaneous influence of an increased concentration of oxygen adsorbed on the surface of plasma-chemical WC – Co nanoparticles during mixing with graphite, and the effect of graphite, which leads to a decrease in activation energy of sintering due to a decrease in the intensity of formation of η-phase particles in “oxidized” WC – Co nanopowders, as well as the formation of a fairly uniform fine-grained structure. Samples of fine-grained ultralow-cobalt hard alloys with increased hardness and fracture toughness were obtained (for a WC – 0.6 wt. % Co – 0.3 wt. % C hard alloy with an average grain size of ~ (1 – 1.5) mm, the hardness is Hv = 20.2 – 20.5 GPa with a minimum crack resistance coefficient KIC = 9.2 – 10.4 MPa·m1/2).","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"126 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":"128062369","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: 0

Investigation of the granulation process of the W – Ni – Fe system nanopowder by spray drying W - Ni - Fe系纳米粉体喷雾干燥造粒工艺研究

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-6-54-69

A. A. Dorofeev, A. Samokhin, A. Fadeev, N. Alekseev, M. Sinayskiy, I. S. Litvinova, I. Zavertyaev

引用次数: 0

Preparation of ZnFe2O4/ZnO/PMMA composition with antibacterial properties and low toxicity 抗菌低毒ZnFe2O4/ZnO/PMMA组合物的制备

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-2-55-64

О. V. Bakina, Е. А. Glazkova, Е. А. Vornakova, V. Zhou, K. Suliz

引用次数: 0

Study of operational properties of steel friction pairs with antifriction coating from copper alloys produced by electric spark alloying 电火花合金化铜合金抗磨涂层钢摩擦副的使用性能研究

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-4-31-41

L. Kuksenova, D. Kozlov, M. Alekseeva

{"title":"Study of operational properties of steel friction pairs with antifriction coating from copper alloys produced by electric spark alloying","authors":"L. Kuksenova, D. Kozlov, M. Alekseeva","doi":"10.30791/0015-3214-2021-4-31-41","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-4-31-41","url":null,"abstract":"Improving the reliability, durability and safety of operation of heavily loaded friction units is an urgent problem in physics, chemistry and surface mechanics. The tribotechnical characteristics of coatings made of bronzes BrAZhMts10-3-1.5 and BrMtsF3-6, applied by electrospark alloying on bushings made of structural steel 30KhGSN2A for operation under conditions of high contact pressure under friction without lubrication, have been investigated. Modes of coating deposition from the standpoint of tribology (the value of the electric discharge current in a pulse, the value of the longitudinal electrode feed per one rotation of the part, the rotation speed of the workpiece, the number of passes during processing, finishing of the coating) have been developed. It was found that when applying bronze BrMtsF3-6 to obtain a high-quality coating, the process must be performed in a protective atmosphere of argon to prevent phosphorus burnout. The tribotechnical efficiency of coatings when working under dry friction conditions is shown. For the steady-state wear mode, the friction coefficient is 0.10 – 0.13 at a pressure of 200 – 250 MPa, the wear resistance of coated steel is doubled. Steel with a bronze coating BrAZhMts10-3-1.5 has a higher bearing capacity, with BrMtsF3-6 coating — a higher antifriction. The ways of increasing the service life of steel-coated steel friction pair are analyzed.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"115 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":"125031931","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

Effect of the target intermediate ion cleaning on the structure of bioresorbable PLLA scaffolds under the coating deposition by DC reactive magnetron sputtering method 目标中间离子清洗对直流反应磁控溅射镀膜下生物可吸收PLLA支架结构的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-4-36-45

P. Maryin, N. Ivanova, E. Shesterikov, E. Bolbasov, S. Tverdokhlebov, Radioelectronics

引用次数: 0

Investigation of the nitride phase in a heat-resistant alloy of the Ni – Co – W – Ti system, hardened by internal nitration 内氮化硬化Ni - Co - W - Ti系耐热合金氮化物相的研究

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-2-63-71

S. Ovsepyan, Fsue “Viam”, Y. Kolobov, M. V. Akhmedzyanov, S. Manokhin, E. Filonova, I. Ras

{"title":"Investigation of the nitride phase in a heat-resistant alloy of the Ni – Co – W – Ti system, hardened by internal nitration","authors":"S. Ovsepyan, Fsue “Viam”, Y. Kolobov, M. V. Akhmedzyanov, S. Manokhin, E. Filonova, I. Ras","doi":"10.30791/0015-3214-2021-2-63-71","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-2-63-71","url":null,"abstract":"In a high-temperature alloy of the Ni – Co – Cr – W – Ti system grade VZh171, using X-ray spectral analysis, scanning and transmission electron microscopy, the composition of the particles of the hardening phase — nitrides after internal nitriding and subsequent heat treatment was studied. It was found that the particles differ on it chemical composition: the main constituent element, titanium or chromium, is proportionally replaced by other alloy components. The nitride compositions near the surface and in the center of the sample differ in the titanium to chromium ratio. After annealing, this difference is smaller, and the chromium content also decreases. It was found that the nitrides formed during nitriding are compounds in which the main forming element, titanium or chromium, is proportionally replaced by other alloy components. The nitride compositions near the surface and in the center of the sample differ in the titanium to chromium ratio. After annealing, this difference is smaller, and the chromium content also decreases.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"278 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":"122852287","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: 0

Interaction of B and Hf with oxygen in a nickel melt at РAr = 0.1 MPa and analysis of nonmetallic inclusions РAr = 0.1 MPa镍熔体中B、Hf与氧的相互作用及非金属夹杂物分析

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-5-49-59

V. Burtsev, E. Chabina

引用次数: 0

Study of the influence of surface layer parameters on the level of their X-ray contrast 研究了表层参数对其x射线对比水平的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-5-21-30

E. O. Nasakina, A. D. Popova, M. Kaplan, A. Mikhailova, M. Sudarchikova, D. A. Novikova, K. V. Sergienko, A. Kolmakov, M. A. Sevost’yanov

引用次数: 0

Effect of pulsed photon treatment on electrophysical and thermal properties of n-type solid solution on the base of Bi2Te3-Bi2Se3. II. Thermal conductivity and thermoelectric figure of merit 脉冲光子处理对Bi2Te3-Bi2Se3基n型固溶体电物理和热性能的影响2热导率和热电优值

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-6-22-27

A. Grebennikov, A. I. Bocharov, S. B. Kushchev, D. Serikov, A. B. Kostyuchenko, E. Fedorova, I. V. Izvekova, I. Safonov, Military Educational

引用次数: 0

Effect of plastic deformation, heat treatment and electron irradiation on structural-phase state of Cu – 40 аt. % Pd alloy 塑性变形、热处理和电子辐照对Cu - 40合金结构相状态的影响。% Pd合金

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-6-11-16

S. V. Simakov, N. Vinogradova, A. Ashmarin, A. B. Mikhajlova, O. N. Nikitushkina, E. E. Starostin, V. I. Tovtin

{"title":"Effect of plastic deformation, heat treatment and electron irradiation on structural-phase state of Cu – 40 аt. % Pd alloy","authors":"S. V. Simakov, N. Vinogradova, A. Ashmarin, A. B. Mikhajlova, O. N. Nikitushkina, E. E. Starostin, V. I. Tovtin","doi":"10.30791/0015-3214-2022-6-11-16","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-6-11-16","url":null,"abstract":"Effect of plastic deformation, heat treatment, and electron irradiation on the structural-phase state of Cu – 40 at. % Pd is studied. X-ray phase analysis of initial samples, samples obtained by rolling up to 0.2 mm, samples annealed after rolling in an argon atmosphere at 950 °C for 1 h, and samples irradiated by high-energy electron in air at temperature of 300 °C was carried out. A change in the phase composition of the samples after rolling was found: ~ 6 % of the ordered β-phase with bcc structure was formed, which disappears after annealing. As a result of irradiation, a layer of copper oxide CuO formed on the surface of the alloy, which under normal thermal conditions is formed at a temperatures of 400 – 500 °C, and the reflections of the ordered β-phase also disappeared in the near-surface layer. The elemental composition of the alloy changed in depth from the irradiated metal surface. Phases with a low degree of long-range order and an increased content of palladium were formed. The presence of these phases is due mainly to the selective oxidation of copper.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"5 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":"121107947","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: 0