Pub Date : 1900-01-01DOI: 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
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).
{"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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-6-54-69
A. A. Dorofeev, A. Samokhin, A. Fadeev, N. Alekseev, M. Sinayskiy, I. S. Litvinova, I. Zavertyaev
A method for obtaining nanopowder microgranules of the W – Ni – Fe system (composition of the VNJ-90) of a micron size range by spray drying of a suspension based on composite nanoparticles obtained by plasma chemical synthesis is considered. The parameters of operation of the Buchi Mini Spray Dryer B-290 spray drying laboratory unit with an ultrasonic nozzle have been experimentally determined, providing for the production of nanopowder microgranules of VNJ-90 with an output of the target fraction of 25 – 63 µm at the level of 65 %. The dependence of the size and morphology of the obtained granules on the choice of the dispersion medium, the concentration of the dispersed phase and the organic binder in the suspension is established. The effect of the suspension flow rate during spray drying on the yield of granules of a fraction of 25 – 63 µm was evaluated. The test of the manufactured experimental sample of nanopowder microgranules in the process of plasma spheroidization was carried out.
研究了用等离子体化学合成的复合纳米颗粒为基础，通过喷雾干燥得到微米级W - Ni - Fe体系(VNJ-90的组成)的纳米粉末微颗粒的方法。实验确定了布吉微型喷雾干燥机B-290超声喷嘴喷雾干燥实验室装置的操作参数，为生产VNJ-90纳米粉末微颗粒提供了条件，目标分数为25 ~ 63µm，输出水平为65%。建立了分散介质的选择、分散相的浓度和悬浮液中有机结合剂的选择对所得颗粒大小和形貌的影响。考察了喷雾干燥过程中悬浮流速对25 ~ 63µm颗粒得率的影响。对制备的纳米粉末微颗粒实验样品在等离子体球化过程中进行了测试。
{"title":"Investigation of the granulation process of the W – Ni – Fe system nanopowder by spray drying","authors":"A. A. Dorofeev, A. Samokhin, A. Fadeev, N. Alekseev, M. Sinayskiy, I. S. Litvinova, I. Zavertyaev","doi":"10.30791/0015-3214-2022-6-54-69","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-6-54-69","url":null,"abstract":"A method for obtaining nanopowder microgranules of the W – Ni – Fe system (composition of the VNJ-90) of a micron size range by spray drying of a suspension based on composite nanoparticles obtained by plasma chemical synthesis is considered. The parameters of operation of the Buchi Mini Spray Dryer B-290 spray drying laboratory unit with an ultrasonic nozzle have been experimentally determined, providing for the production of nanopowder microgranules of VNJ-90 with an output of the target fraction of 25 – 63 µm at the level of 65 %. The dependence of the size and morphology of the obtained granules on the choice of the dispersion medium, the concentration of the dispersed phase and the organic binder in the suspension is established. The effect of the suspension flow rate during spray drying on the yield of granules of a fraction of 25 – 63 µm was evaluated. The test of the manufactured experimental sample of nanopowder microgranules in the process of plasma spheroidization was carried out.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"122 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":"128148542","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-2-55-64
О. V. Bakina, Е. А. Glazkova, Е. А. Vornakova, V. Zhou, K. Suliz
In present work, the possibility of obtaining ZnFe2O4/ZnO nanoparticles by electric explosion of zinc and iron wires in an oxygen-containing atmosphere is shown. Based on the obtained nanoparticles and polymethyl methacrylate, ZnFe2O4/ZnO/PMMA composite was obtained, containing from 0.5 to 10 wt. % of nanoparticles. The composite film suppressed the viability of E. coli bacteria with an efficiency of 99.99 %, which is due to the generation of reactive oxygen species. The synthesized composite material with high antibacterial activity is promising for the production of antimicrobial materials for medicine for a long time.
{"title":"Preparation of ZnFe2O4/ZnO/PMMA composition with antibacterial properties and low toxicity","authors":"О. V. Bakina, Е. А. Glazkova, Е. А. Vornakova, V. Zhou, K. Suliz","doi":"10.30791/0015-3214-2022-2-55-64","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-2-55-64","url":null,"abstract":"In present work, the possibility of obtaining ZnFe2O4/ZnO nanoparticles by electric explosion of zinc and iron wires in an oxygen-containing atmosphere is shown. Based on the obtained nanoparticles and polymethyl methacrylate, ZnFe2O4/ZnO/PMMA composite was obtained, containing from 0.5 to 10 wt. % of nanoparticles. The composite film suppressed the viability of E. coli bacteria with an efficiency of 99.99 %, which is due to the generation of reactive oxygen species. The synthesized composite material with high antibacterial activity is promising for the production of antimicrobial materials for medicine for a long time.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"114 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":"115450256","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2021-4-31-41
L. Kuksenova, D. Kozlov, M. Alekseeva
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.
{"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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2019-4-36-45
P. Maryin, N. Ivanova, E. Shesterikov, E. Bolbasov, S. Tverdokhlebov, Radioelectronics
{"title":"Effect of the target intermediate ion cleaning on the structure of bioresorbable PLLA scaffolds under the coating deposition by DC reactive magnetron sputtering method","authors":"P. Maryin, N. Ivanova, E. Shesterikov, E. Bolbasov, S. Tverdokhlebov, Radioelectronics","doi":"10.30791/0015-3214-2019-4-36-45","DOIUrl":"https://doi.org/10.30791/0015-3214-2019-4-36-45","url":null,"abstract":"","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"57 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":"122821557","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2021-2-63-71
S. Ovsepyan, Fsue “Viam”, Y. Kolobov, M. V. Akhmedzyanov, S. Manokhin, E. Filonova, I. Ras
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.
在Ni - Co - Cr - W - Ti体系牌号VZh171高温合金中，采用x射线光谱分析、扫描电镜和透射电镜研究了内渗和热处理后硬化相氮化物颗粒的组成。结果发现，颗粒的化学成分不同:主要成分钛或铬按比例被其他合金成分所取代。在钛铬比中，样品表面附近和中心的氮化物组成不同。退火后，这种差异变小，铬含量也降低。结果表明，在氮化过程中形成的氮化物是主要形成元素钛或铬按比例被其他合金成分取代的化合物。在钛铬比中，样品表面附近和中心的氮化物组成不同。退火后，这种差异变小，铬含量也降低。
{"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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2021-5-49-59
V. Burtsev, E. Chabina
The deoxidation of complex alloyed nickel-based alloys during melting in vacuum is carried out in the presence of aluminum with strong deoxidizers B and Hf, which requires additional knowledge about the activity of dissolved oxygen. For this, the activity was investigated in model melts Ni – O – (B/Hf, 0.001 – 0.1 wt. % of each) and Ni – O – Al (5 %) – (B/Hf, 0.001 – 0.1 wt. % of each) at 1560 °C and РAr = 0.1 MPa by the method of instantaneous EMF recording using certified sensors. It was shown that a[O] with the introduction of B into the melt without aluminum is 1.3 times less than with the introduction of Hf, and for melts with aluminum, a[O] decreased 1.6 times as compared with Hf. The study of the morphology and composition of non-metallic inclusions of the Ni – O – (B/Hf) systems showed that the inclusions are located along grain boundaries, have various complex configurations and sizes from 2 to 100 μm. These phases contain Ni, Fe, Zr, S, O, as well as Hf, Pb, Bi, Si, Mg after deoxidation of Hf and an increased content of Zr after deoxidation of B.
复合合金镍基合金在真空熔融过程中的脱氧是在铝和强脱氧剂B和Hf存在下进行的，这需要对溶解氧的活性有额外的了解。为此，在模型熔体中研究了Ni - O - (B/Hf, 0.001 - 0.1 wt. %)和Ni - O - Al (5%) - (B/Hf, 0.001 - 0.1 wt. %)的活度。在1560°C和РAr = 0.1 MPa下，通过使用经过认证的传感器进行瞬时EMF记录的方法。结果表明，在不含铝的熔体中，引入B的a[O]比引入Hf的a[O]少1.3倍，而在含铝的熔体中，a[O]比引入Hf的a[O]减少1.6倍。对Ni - O - (B/Hf)体系中非金属夹杂物的形貌和组成进行了研究，结果表明:Ni - O - (B/Hf)体系中非金属夹杂物沿晶界分布，具有2 ~ 100 μm的复杂形态和尺寸;这些相中含有Ni、Fe、Zr、S、O，以及Hf脱氧后的Hf、Pb、Bi、Si、Mg, B脱氧后的Zr含量增加。
{"title":"Interaction of B and Hf with oxygen in a nickel melt at РAr = 0.1 MPa and analysis of nonmetallic inclusions","authors":"V. Burtsev, E. Chabina","doi":"10.30791/0015-3214-2021-5-49-59","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-5-49-59","url":null,"abstract":"The deoxidation of complex alloyed nickel-based alloys during melting in vacuum is carried out in the presence of aluminum with strong deoxidizers B and Hf, which requires additional knowledge about the activity of dissolved oxygen. For this, the activity was investigated in model melts Ni – O – (B/Hf, 0.001 – 0.1 wt. % of each) and Ni – O – Al (5 %) – (B/Hf, 0.001 – 0.1 wt. % of each) at 1560 °C and РAr = 0.1 MPa by the method of instantaneous EMF recording using certified sensors. It was shown that a[O] with the introduction of B into the melt without aluminum is 1.3 times less than with the introduction of Hf, and for melts with aluminum, a[O] decreased 1.6 times as compared with Hf. The study of the morphology and composition of non-metallic inclusions of the Ni – O – (B/Hf) systems showed that the inclusions are located along grain boundaries, have various complex configurations and sizes from 2 to 100 μm. These phases contain Ni, Fe, Zr, S, O, as well as Hf, Pb, Bi, Si, Mg after deoxidation of Hf and an increased content of Zr after deoxidation of B.","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":"125741955","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}
Pub Date : 1900-01-01DOI: 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
Nano- and microdimensional tantalum surface layers were created on wire and flat NiTi substrates by magnetron sputtering. The samples structure and composition were determined using SEM and Auger spectroscopy. As the sputtering time increases, the thickness of the surface layer increases non-linearly, which leads to a change in the radiopacity of the material relative to the substrate. Based on the calculations of the coefficient of linear attenuation of X-ray radiation, it is shown that a layered composite in the form of a plate with a surface layer on only one side can be conditionally represented as a multicomponent monolith, but with a rounded sample section, a continuous surface layer surrounding it from all sides has a greater effect on radiopacity.
{"title":"Study of the influence of surface layer parameters on the level of their X-ray contrast","authors":"E. O. Nasakina, A. D. Popova, M. Kaplan, A. Mikhailova, M. Sudarchikova, D. A. Novikova, K. V. Sergienko, A. Kolmakov, M. A. Sevost’yanov","doi":"10.30791/0015-3214-2022-5-21-30","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-5-21-30","url":null,"abstract":"Nano- and microdimensional tantalum surface layers were created on wire and flat NiTi substrates by magnetron sputtering. The samples structure and composition were determined using SEM and Auger spectroscopy. As the sputtering time increases, the thickness of the surface layer increases non-linearly, which leads to a change in the radiopacity of the material relative to the substrate. Based on the calculations of the coefficient of linear attenuation of X-ray radiation, it is shown that a layered composite in the form of a plate with a surface layer on only one side can be conditionally represented as a multicomponent monolith, but with a rounded sample section, a continuous surface layer surrounding it from all sides has a greater effect on radiopacity.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"131 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":"121609063","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}
Pub Date : 1900-01-01DOI: 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
{"title":"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","authors":"A. Grebennikov, A. I. Bocharov, S. B. Kushchev, D. Serikov, A. B. Kostyuchenko, E. Fedorova, I. V. Izvekova, I. Safonov, Military Educational","doi":"10.30791/0015-3214-2019-6-22-27","DOIUrl":"https://doi.org/10.30791/0015-3214-2019-6-22-27","url":null,"abstract":"","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"29 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":"122445903","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}
Pub Date : 1900-01-01DOI: 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
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.
{"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}
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