Physics and Chemistry of Materials Treatment最新文献_第9页

Cermet plasma coatings with TiC and TiCrC carbides TiC和TiCrC碳化物金属陶瓷等离子体涂层

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-2-23-34

V. Kalita, A. Radyuk, D. I. Komlev, V. Shamraǐ, A. Mikhailova, M. Alymov, A. Alpatov, D. D. Titov

引用次数: 0

Development of the methods for determination of Ag, Cu, Fe, Zn contents in medical materials based on calcium phosphate 基于磷酸钙的医用材料中银、铜、铁、锌含量测定方法的建立

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-4-67-73

V. A. Volchenkova, E. K. Kazenas, N. Andreeva, T. N. Penkina, S. K. Rodionova, V. B. Smirnova, A. Fomina, O. N. Fomina, I. Fadeeva, A. Fomin, M. Goldberg

引用次数: 0

Identification of relaxation maxima of internal friction in the Zr – Nb alloy after nitriding, oxidation in air, and in situ carburization 氮化、空气氧化和原位渗碳后Zr - Nb合金内摩擦弛豫最大值的确定

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-6-26-34

V. Anan’in, B. Kalin, V. Novikov, A. V. Sumarokova

{"title":"Identification of relaxation maxima of internal friction in the Zr – Nb alloy after nitriding, oxidation in air, and in situ carburization","authors":"V. Anan’in, B. Kalin, V. Novikov, A. V. Sumarokova","doi":"10.30791/0015-3214-2021-6-26-34","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-6-26-34","url":null,"abstract":"The internal friction method was used to study the behavior of the Zr – 1 wt. % Nb alloy after oxidation in air, nitriding in an atmosphere of technical nitrogen, and in situ carburization during measurements. In this case, carbon was deposited on the samples during measurements due to thermal decomposition of vapors of diffusion oil. The pressure in the system was about 10–2 Pa. The temperature dependence of the logarithmic decrement of damped bending vibrations with a frequency of 2.2 – 2.4  Hz was measured on specimens in the form of a rectangular plate 22 × 8 × 0.3 mm in size. The measurements were carried out at a constant heating rate of about 4 K/min from room temperature to 700 – 750 °C. The obtained temperature dependences of internal friction were divided into partial maxima using a special program. The program determines the temperatures of the relaxation maxima and calculates the effective activation energy using the Werth — Marx formula. The internal friction spectra in successive measurements on one sample changed due to the diffusion redistribution of the alloy components. The parameters of the relaxation maxima for carbon (153 – 159 kJ/mol), oxygen (203 – 207 kJ/mol) and nitrogen (235 – 238 kJ/mol) in the alloy under study, depending on the experimental conditions, have been established. Grain-boundary (Gb) impurity maxima due to these impurities were also found. The following activation energies were obtained: 173 – 179 kJ/mol for C-Gb, 216 – 219  kJ/mol for O-Gb and 222 – 229 kJ/mol for N-Gb. Impurity grain-boundary maxima associated with carbon, oxygen, and nitrogen were observed in each series of measurements. The activation energy of the grain-boundary maxima proper decreases monotonically from 202.4 to 194.5 kJ/mol in a series with oxidation in air (experiments 711 – 715), and remains about 200 kJ/mol in nitrided samples.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"368 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":"122671067","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

Improving the properties of plasma heat-resistant coatings by means of spraying materials that reacting with exothermic effects 利用与放热效应反应的喷涂材料改善等离子体耐热涂层的性能

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-2-51-55

V. Gusev, O. Elagina, A. G. Buklakov

{"title":"Improving the properties of plasma heat-resistant coatings by means of spraying materials that reacting with exothermic effects","authors":"V. Gusev, O. Elagina, A. G. Buklakov","doi":"10.30791/0015-3214-2021-2-51-55","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-2-51-55","url":null,"abstract":"The quality of heat-resistant coatings deposited by flame spraying is largely determined by the adhesion of the coating to the surface of the part. One of the ways to increase adhesion is to deposition intermediate layers of thermosetting powders between the base material and the coating. In this work, two versions of heat-protective coatings are investigated — a two-layer coating consisting of an Al – Ni sublayer (20 – 80 wt. %) and a main ZrO2 layer, and a single-layer coating sprayed from an aluminum-clad zirconium oxide powder (20 ZrO2 – 80 Al, wt. % ). The method of differential thermal analysis was used to determine the temperature ranges and values of the exothermic effects of oxidation and redox reactions during heating of Al – Ni and ZrO2 clad powders. A significant exothermic effect was found during oxidation of the aluminum cladding shell in the temperature range of 360 °C and a stronger thermal effect due to the redox reaction at a temperature of 920 °C. The microstructure and microhardness of the obtained coatings have been studied, and their thermal conductivity and adhesion have been assessed. The resistance of the coatings during thermal cycling tests has been determined. It has been established that thermal protective coatings made of aluminum-clad zirconium oxide powder have the best characteristics under thermal cycling conditions. A higher level of adhesion and thermal cyclic resistance of such coatings are due to an increase in the enthalpy of aluminum-clad ZrO2 powders due to exothermic reactions and the presence of a metal binder.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"3 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":"124847043","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

Physicochemical methods for increase of aliphatic polyesters surface hydrophilicity for tissue engineering constructions 组织工程结构中提高脂肪族聚酯表面亲水性的物理化学方法

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-6-72-78

A. Dunaev, A. Mariyanats, M. Syachina, E. M. Trifanova, V. Popov

引用次数: 0

Synthesis of LTA zeolite based on natural minerals of Nakhchivan: the influence of various factors on the crystallization process 以纳希切万天然矿物为原料合成LTA沸石:各种因素对结晶过程的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-3-74-84

G. Mamedova

{"title":"Synthesis of LTA zeolite based on natural minerals of Nakhchivan: the influence of various factors on the crystallization process","authors":"G. Mamedova","doi":"10.30791/0015-3214-2022-3-74-84","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-3-74-84","url":null,"abstract":"The process of crystallization of LTA type zeolite promising for practical use has been studied, the influence of various factors on the rate and selectivity of synthesis using natural minerals from Nakhchivan has been considered. The influence of temperature in the range of 80 – 150 °C, the weight ratio of the initial components of halloysite (G) and obsidian (O) G:O, equal to 1:1, 1:2, 1:3, 2:1 and 3:1, the concentration of the used thermal NaOH solution in the range of 5 – 30 % and the process duration in the range of 10 – 100 hours for the crystallization of LTA were studied. It has been determined that the optimal conditions for the synthesis of a single-phase zeolite of the LTA type with 100 % crystallinity are: temperature 100 ± 10 °C, concentration of thermal NaOH solution — 10 – 15 %, the ratio of the initial components of halloysite (G) and obsidian (O) G:O, equal to 1:1, processing time — 20 hours. Synthesis of zeolite LTA using natural minerals of Nakhchivan was carried out in the presence of tetramethylammonium hydroxide (TMAOH). The effect of temperature, concentration of thermal NaOH solution, ratio of initial components, duration of aging on the process of LTA crystallization has been studied. It was shown that violation of the optimal synthesis conditions leads to a decrease in the selectivity of the process and the formation of other zeolites (X), aluminosilicates (sodalite, anorthite, sanidine) or their associations, as well as quartz. The process of aging was studied in the duration interval from 1 to 3 days. It has been determined that an increase in the aging duration leads to an increase in the linear rate of crystallization of the LTA zeolite.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"59 9 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":"127581857","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

Kinetics of spark plasma sintering of WC-10% Co ultrafine-grained hard alloy WC-10% Co超细晶硬质合金火花等离子烧结动力学

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-6-36-51

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

引用次数: 1

The film properties that obtained in the atmospheric pressure plasma from aniline 在常压等离子体中从苯胺中获得的薄膜性质

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-1-16-26

М. P. Danilaev, I. Vakhitov, S. V. Drobushev, I. Lounev, B. Kamaliev, S. Karandashov, V. Kuklin, М. S. Pudovkin

{"title":"The film properties that obtained in the atmospheric pressure plasma from aniline","authors":"М. P. Danilaev, I. Vakhitov, S. V. Drobushev, I. Lounev, B. Kamaliev, S. Karandashov, V. Kuklin, М. S. Pudovkin","doi":"10.30791/0015-3214-2022-1-16-26","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-1-16-26","url":null,"abstract":"The polyaniline (PANI) films filled by carbon particles can demonstrate the conductivity increasing. The carbon particles uniform distribution in the PANI films can be received by their contemporaneously formation in the atmospheric pressure plasma. The films properties produced from aniline contemporaneously with carbon particles in the atmospheric pressure plasma are considered in that paper. The energy density threshold (~ 30 mJ/m) of gas discharge starting from which it is possible to obtain a continuous film filled with agglomerates of carbon particles was defined. It was showing that the such films has the amorphous morphology. It was defined that the carbon particles agglomerates in the PANI films. The carbon particles agglomerates concentration in the PANI films is about ~(4 – 7)·104 1/cm2 and slowly depends on the energy density. So the conductivity of that films cant be increasing by this particles. It was shown that the films moisture saturation is the main reason of them conductivity increasing. It was shown that the films creep are decreases and the hardness increases when the gas discharge energy density increases. Its because the crosslinks number is growth in the samples. The molecular weight of PANI films is low, so the Martens hardness value has low-level.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"16 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":"114724531","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

The rate of the fast particles going out a planar channeled regime in quasi-classic approach 准经典方法中快速粒子冲出平面通道的速率

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-4-5-11

Y. Kashlev, S. A. Maslyaev

引用次数: 0

Peculiarities of residual stresses formation in welded joints and stellite surfacing on the rail steel 钢轨钢焊接接头残余应力形成及星状合金堆焊的特点

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-3-31-39

S. Betsofen, K. Grigorovich, A. Ashmarin, A. Abdurashitov, M. Lebedev

引用次数: 0