Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya最新文献_第8页

Kinetics of dielectric coating formation on iron powders to obtain soft magnetic composite materials 铁粉制备软磁复合材料的介电膜形成动力学

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-12-15 DOI: 10.17073/1997-308x-2019-4-44-54

B. Gasanov, V. G. Tamadaev, V. O. Bogachev, E. R. Makhmudova

{"title":"Kinetics of dielectric coating formation on iron powders to obtain soft magnetic composite materials","authors":"B. Gasanov, V. G. Tamadaev, V. O. Bogachev, E. R. Makhmudova","doi":"10.17073/1997-308x-2019-4-44-54","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-4-44-54","url":null,"abstract":"powders. The study demonstrates the effect of sodium silicate (Na 2 O–SiO 2 ) concentration in the water solution on the kinetics of dielectric coating formation on different iron powder grades, as well as on their weight gain, average coating thickness, as well as physical and process characteristics. It is experimentally established that the influence of iron powder particle morphology and surface tension coefficient at solid-liquid interface on the coating thickness can be assessed indirectly by the wettability indicators, in particular, by the contact angle. The features of SMCM interlayer boundary structure formation are described. Elemental mapping using the energy dispersive X -ray spectrometer shows that after sample pressing at 600 MPa and their subsequent heating within 400–600 °C, the coating thickness changes and silicon is partially redistributed in the dielectric layer. This is determined by the fact that silicon featuring higher oxophilicity than iron actively reacts with oxygen adsorbed on the iron particle surface and/or reduces iron oxides forming SiO 2 in the form of a dense film, which on the one hand protects iron particles from oxidation, and on the other hand forms a dielectric layer in the zone of iron particle contact that affects specific magnetic losses. It is determined that the distinctive feature of coated iron powder compaction is the structural deformation predominance during pressing since the coating reduces the internal friction coefficient. It is shown that according to its magnetic characteristics, the developed SMCM meets essential contemporary requirements for soft magnetic composite materials.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73007076","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

Sukyas Semenovich Ordaniyan celebrates his 85th anniversary Sukyas Semenovich Ordaniyan庆祝他85岁生日

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-12-15 DOI: 10.17073/1997-308x-2019-4-78

A. Editorial

引用次数: 0

Production of cast materials based on Cr2AlC MAX phase by SHS metallurgy using coupled chemical reaction 利用耦合化学反应SHS冶金法制备Cr2AlC MAX相铸造材料

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-12-15 DOI: 10.17073/1997-308x-2019-4-14-20

V. Gorshkov, P. Miloserdov, N. Khomenko, N. Sachkova

引用次数: 1

The effect of sodium microalloying on the rolling contact fatigue and mechanical properties of hot-deformed powder steels 微合金化钠对热变形粉末钢轧制接触疲劳及力学性能的影响

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-12-15 DOI: 10.17073/1997-308x-2019-4-4-13

V. Dorofeyev, A. Sviridova, L. Svistun

引用次数: 1

Structure and phase composition of SHS products in titanium, carbon and aluminum reactive mixtures 钛、碳和铝反应混合物中SHS产物的结构和相组成

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-09-26 DOI: 10.17073/1997-308x-2019-3-26-35

G. A. Pribytkov, M. G. Krinitsyn, V. Korzhova, A. Baranovskiy

{"title":"Structure and phase composition of SHS products in titanium, carbon and aluminum reactive mixtures","authors":"G. A. Pribytkov, M. G. Krinitsyn, V. Korzhova, A. Baranovskiy","doi":"10.17073/1997-308x-2019-3-26-35","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-26-35","url":null,"abstract":"The TiC + Al binder metal matrix composites were obtained by self-propagating high-temperature synthesis (SHS) in the reactive powder mixtures of titanium, carbon (carbon black) and aluminum. It was found that a steady-state wave combustion occurs when the aluminum powder content in reactive mixtures does not exceed 50 wt.%. Loose SHS cakes obtained during synthesis were crashed and screened to get lumpy, nearly equlaxial composite powders favorable to good flowability necessary for powder application in cladding and spraying of wear-resistant coatings. The synthesis products were studied by scanning electron microscopy, X-ray diffraction (XRD) and local energy-dispersive X-ray spectroscopy (EDX). It was found that the average size of carbide inclusions in the composite structure depends on the content of thermally inert aluminum powder in the reaction mixtures. The titanium carbide lattice parameter determined by XRD turned out to be slightly below the known values for equiatomic titanium carbide. However, no any dependence of the lattice parameter on the aluminum content in composites was found. TiC inclusions in the composite structure were investigated by EDX spectroscopy. Titanium content in the carbide was close to that in equiatomic titanium carbide. Titanium carbide contains up to 2.5 wt.% aluminum in addition to titanium and carbon. Aluminum dissolution in the carbide lattice can influence the lattice parameter.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75331989","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

Non-sensitizing Zr–O–N coatings for jewelry made of non-precious alloys 非贵重合金首饰用无增感Zr-O-N涂层

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-09-26 DOI: 10.17073/1997-308x-2019-3-65-72

В. Е. Баженов, Е. С. Храмченкова, А. В. Колтыгин, С. В. Прищепов, И. В. Шкалей

{"title":"Non-sensitizing Zr–O–N coatings for jewelry made of non-precious alloys","authors":"В. Е. Баженов, Е. С. Храмченкова, А. В. Колтыгин, С. В. Прищепов, И. В. Шкалей","doi":"10.17073/1997-308x-2019-3-65-72","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-65-72","url":null,"abstract":"Recent decades jewelry manufacturers put into practice using of non-precious alloys in order to decrease the production costs. Nevertheless, the large number of customers has allergic (sensitizing) body reaction on jewelries. Applying of non-sensitizing coating is able to decrease negative influence of jewelry material on human body. One of the biologically inert materials toward to human body tissues is zirconium. In the present work we examined the zirconium-based coatings applied by magnetron sputtering. Eleven coating regimes of AISI 430 steel substrates by zirconium oxynitride were investigated. Coatings corrosion test in Hank’s solution, microhardness measurements, color performance in CIE 1976 L*a*b* and RGB color spaces were carried out. The coating width was 0.4–1.2 μm. It was established that coatings have microhardness 2.5–3.0 GPa and can simulate jewelries colors. Using energy dispersive X-ray spectroscopy, it was evaluated that coatings consist of Zr, N and O. We select the sputtering regimes which provides metallic type coatings with the high optical reflectivity in the energy range near the infrared part of spectrum (<1.7 eV) and has golden color with a high lightness. It was experimentally proved that coatings are not corroding in Hank’s solution. The allergy patch test of jewelry with zirconium oxynitride coating demonstrate a good result on respondents with sensitizing reaction to non-precious alloys jewelry. The obtained results allow us to recommend the application of a zirconium-based coating magnetron sputtering in manufacturing of the non-precious alloys jewelry.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79508079","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 TiB2–TiN eutectic alloy obtained by combustion synthesis for chemical resistance in mineral acid media 燃烧合成TiB2-TiN共晶合金在无机酸介质中的耐化学性研究

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-09-26 DOI: 10.17073/1997-308x-2019-3-42-48

T. I. Ignatieva, A. G. Tarasov, V. N. Semenova, I. A. Studenikin, Yu. A. Karozina Yu.A.

{"title":"Investigation of TiB2–TiN eutectic alloy obtained by combustion synthesis for chemical resistance in mineral acid media","authors":"T. I. Ignatieva, A. G. Tarasov, V. N. Semenova, I. A. Studenikin, Yu. A. Karozina Yu.A.","doi":"10.17073/1997-308x-2019-3-42-48","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-42-48","url":null,"abstract":"The article presents the results obtained in the corrosion resistance study of TiB2/TiN eutectic alloy powder in HCl and HNO3 mineral acids. Experiments were carried out on samples synthesized in the combustion mode and then ground in an agate vessel. The morphology, size distribution and specific surface area of particles were determined in the obtained powder samples. Corrosion resistance experiments were conducted with varying acid concentration from 0.2 to 6.0 M and process temperature from 25 to 80 °C. Chemical analysis of the studied products of interaction with an aggressive medium was carried out to determine the content of main elements in them (titanium, boron, nitrogen) using methods developed for refractory compounds. As a result of the work carried out, it was shown that samples have the greatest resistance when interacting with solutions of diluted acids at room temperature, and their resistance decreases as acid concentration and/or process temperature rises. It was found that interaction with the acid occurs with both TiB2 and TiN phases in all cases considered in the paper. At the same time, the reaction involving the TiB2 phase was faster. For the first time deep corrosion and corrosion resistance of the alloy in HCl and HNO3 media were measured at room temperature and 1.0 M acid concentration. Based on the obtained data, the investigated alloy was classified as a «resistant» material. Corrosion resistance by a ten-point scale in HCl and HNO3 media was «4» and «5», respectively.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88449655","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

Temperature dependence of TiN/TiAl3/Ti2AlN composite material electric resistivity TiN/TiAl3/Ti2AlN复合材料电阻率的温度依赖性

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-09-26 DOI: 10.17073/1997-308x-2019-3-36-41

A. A. Kondakov, A. Karpov, V. Grachev, A. Sytschev

引用次数: 0

Using mechanochemical treatment to obtain metal powders for energy-intensive combustible compositions. 2. Structure and reactivity of mechanically activated Al–modifier–SiО2 mixtures 利用机械化学处理获得能量密集型可燃成分的金属粉末。2. 机械活化Al-modifier-SiО2混合物的结构和反应性

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-09-26 DOI: 10.17073/1997-308x-2019-3-13-25

N. Mofa, B. Sadykov, A. Bakkara, Z. Mansurov

{"title":"Using mechanochemical treatment to obtain metal powders for energy-intensive combustible compositions. 2. Structure and reactivity of mechanically activated Al–modifier–SiО2 mixtures","authors":"N. Mofa, B. Sadykov, A. Bakkara, Z. Mansurov","doi":"10.17073/1997-308x-2019-3-13-25","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-13-25","url":null,"abstract":"The paper presents the results obtained when studying particles of aluminum-modifier-quartz composites by different physicochemical methods after mechanochemical treatment (MCT) in a planetary centrifugal mill. Graphite (C), polyvinyl alcohol (PVA) and stearic acid (SA) were used as modifiers. To increase the dispersibility of plastic metal powders in the composition (modifier metal), MCT was carried out in the presence of quartz with its mass fraction in the composite ranging from 5 to 20 %. The most significant grinding of aluminum particles was observed with an increase in the graphite content from 5 to 20 %, and SiO2 from 5 to 10 % in the composition of aluminum-modifier-quartz composites. The particle size decreases, while the crystallite size increases with an increase in the quartz content in the composite during the Al–SA–SiO2 system MCT. Al–SA–5%SiO2 showed the maximum defectiveness of aluminum after MCT. For the Al–PVA–SiO2 composition after MCT, an increase in the particle size and, accordingly, a decrease in the specific surface were observed at sufficiently low crystallite size values. It was shown that with an increase in the quartz content in the system, the defective crystal structure of aluminum particles increases as a result of MCT. In this case, the synthesized powder material is a composite formation of aluminum and quartz particles bound by a polymer obtained from polyvinyl alcohol. As a result of Al–modifier–SiO2 mixture MCT, powder activity increases due to the accumulation and redistribution of defects in aluminum particles, as well as changes in the surface structure occurring after modifying additives penetration into the oxide layer to be destroyed. A conceptual model for the transformation of the surface layer and subgrain structure of aluminum particles as a result of MCT is presented.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81812561","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

Structural-technological model of wear for surfacing materials based on Fe–Cr–Ni–Мо and Fe–Co–Ni–Мо 基于Fe-Cr-Ni -Мо和Fe-Co-Ni -Мо的堆焊材料磨损结构工艺模型

Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya Pub Date : 2019-09-26 DOI: 10.17073/1997-308x-2019-3-57-64

N. B. Fomicheva, L. M. Nechaev, E. Markova, G. V. Serzhantova

{"title":"Structural-technological model of wear for surfacing materials based on Fe–Cr–Ni–Мо and Fe–Co–Ni–Мо","authors":"N. B. Fomicheva, L. M. Nechaev, E. Markova, G. V. Serzhantova","doi":"10.17073/1997-308x-2019-3-57-64","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-57-64","url":null,"abstract":"The paper presents the results obtained when studying the structure of surfacing materials based on martensitic-aging Fe–Cr– Ni–Мо и Fe–Co–Ni–Мо alloys obtained by plasma powder surfacing. Silicon was chosen as an alloying element, which made it possible to significantly improve the technical and economic performance of martensitic-aging materials. A comparison of martensitic-aging steels with high-carbon steels showed that the former provide an advantage as a wear-resistant material due to their increased resistance to crack propagation. Microscopic analysis, X-ray diffraction analysis and electron microprobe analysis were used for the research. Surfacing materials were tested for wear and internal friction. Silicon oxide particles and chromium and molybdene silicides involved in the process of alloying material strengthening were found during the experiments. Silicide particle density was determined that varies depending on the amount of silicon in the material. The effect of the silicon content on the material hardness was considered. The data obtained on the structure and phase composition of Fe–Cr–Ni–Мо и Fe–Co–Ni–Мо compounds doped with silicon in both the initial and aged states made it possible to suggest a structural-physical model of their hardening in the course of aging. Results of the experiments showed that the heat treatment process actively influences the wear rate and weight wear reducing their values that is typical for both Fe–Cr–Ni–Мо and Fe–Co–Ni–Мо alloys. Based on these data, a structural-technological model of wear was obtained for the surfacing materials studied.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85116398","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