Physics and Chemistry of Materials Treatment最新文献_第2页

The effect of photonic processing on increasing the thermoelectric Q-factor of a solid solution Bi2Te3 – Bi2Se3 光子处理对提高Bi2Te3 - Bi2Se3固溶体热电q因子的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-1-5-15

Е. K. Belonogov, S. Kuschev, М. P. Sumets, D. Serikov, А. А. Grebennikov, V. Dybov, А. Kostyuchenko, Т. L. Turaeva

{"title":"The effect of photonic processing on increasing the thermoelectric Q-factor of a solid solution Bi2Te3 – Bi2Se3","authors":"Е. K. Belonogov, S. Kuschev, М. P. Sumets, D. Serikov, А. А. Grebennikov, V. Dybov, А. Kostyuchenko, Т. L. Turaeva","doi":"10.30791/0015-3214-2022-1-5-15","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-1-5-15","url":null,"abstract":"In the present work, the phase compositions, morphology, structure, and thermal conductivity of Bi2Te3 – хSeх-based semiconductor wafers before and after the photon treatment (PT) were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and laser flash methods. The semiconductor plates 10 × 10 × 2 mm in size were prepared by electric discharge cutting from the briquettes, synthesized by hot pressing of Bi2Te3 – хSeх powder. Then, the plates were annealed at 570 K in an argon atmosphere for 24 h. The PT was carried out in an Ar atmosphere by irradiation of gas-discharge xenon lamps with pulses of 1.0 and 1.4 s and energy density ranging from 125 to 175 J/cm2. As revealed, the PT initiates the formation of a thin surface layer with an inhomogeneous nanocrystalline structure and an arbitrary nanocrystals orientation. The volume of material manifests a large-block textured crystalline structure with the original elemental and phase compositions formed during the extrusion. Thereby, a gradient nanostructured region composed of nano-sized and large Bi2Te3 – хSeх crystals with tunneling contacts is formed in the process of PT. We revealed that the PT changes the material bandgap slightly, decreases the concentration of charge carriers, increasing their mobility. The scattering of carriers and photons on linear defects dominates in a wide temperature range in the studied samples. Thereby, the figure of merit rise s by 8 % after PT, due to a decrease in the phonon component of thermal conductivity.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"37 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":"115201345","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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Study of gasless combustion products of Ti – Si – Al powder mixtures 钛-硅-铝混合粉末无气燃烧产物的研究

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2022-1-57-65

G. A. Pribytkov, V. Korzhova, I. Firsina, A. V. Baranovskii, E. Korosteleva

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Spheroidization of the Fe-based powders in an electroarc plasmotron plasma stream and application of these powders in selective laser melting 铁基粉末在电弧等离子体流中的球化及其在选择性激光熔化中的应用

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-4-12-20

A. Samokhin, A. Fadeev, N. Alekseev, M. A. Sinaysky, V. Sufiyarov, E. Borisov, O. Korznikov, T. Fedina, G. S. Vodovozova, S. V. Baryshkov

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The effect of long-term annealing simulating the parameters of dry storage of VVER-1000 fuel rods on the mechanical properties of E110 alloy shells in the longitudinal direction 模拟VVER-1000燃料棒干贮存参数的长期退火对E110合金壳体纵向力学性能的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-4-42-49

G. Kobylyansky, А. О. Mazaev, Е. А. Zvir, S. Eremin, Е. V. Chertopyatov, А. V. Obukhov

{"title":"The effect of long-term annealing simulating the parameters of dry storage of VVER-1000 fuel rods on the mechanical properties of E110 alloy shells in the longitudinal direction","authors":"G. Kobylyansky, А. О. Mazaev, Е. А. Zvir, S. Eremin, Е. V. Chertopyatov, А. V. Obukhov","doi":"10.30791/0015-3214-2021-4-42-49","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-4-42-49","url":null,"abstract":"Presented are the results of mechanical tensile tests of longitudinal (segmental) samples cut from the midsection of claddings spent as VVER-1000 FA during one- and six-year campaigns and subject to thermal tests in helium at 480 °С during 468 full days. An average burnup of these fuel rods achieved ~ 20 and ~ 70 (MW·day)/kg U, respectively. The tests followed the examinations for cladding mechanical properties performed using the tests results for ring samples cut from the specified fuel rods. These fuel rods were tested in the experiments to determine impact of long-term thermal tests that model dry storage conditions on mechanical properties of Zr E110 claddings. Based on mechanical tests results at room temperature and at 380 °С there was determined as follows: ultimate strength sв, yield strength s0,2 and total relative elongation d0 of claddings length-wise on the fuel rod segments at the fuel column midsection. The obtained characteristics were compared to corresponding values for initial (unirradiated) cladding tubes and mechanical test results of the ring samples in the transverse direction. Long-term thermal tests have led to partial return to initial (before operation) values sв, s0,2 and d0 of radiation-hardened claddings; this return was more prominent in the longitudinal direction than in the transverse one. A radiation hardening decrease was accompanied with an increase in total relative elongation values in both cladding directions. Anisotropy of yield strength has changed as well. These changes can be explained by partial annealing of radiation defects, which are obstacles to dislocation movements during cladding strain. The morphology of above radiation defects is different in various sliding planes in texturized grains of cladding material.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"59 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":"123924383","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 preliminary laser treatment of 12Cr18Ni10Ti steel surfaces on their diffusion welding 12Cr18Ni10Ti钢表面初步激光处理对扩散焊接的影响

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-5-22-29

A. V. Liushinskii, V. N. Petrovskii, V. N. Yolkin

引用次数: 0

Structure and wear resistance of the coatings plasma sprayed with “TiC+high chromium cast iron binder” composite powder “TiC+高铬铸铁结合剂”复合粉末等离子喷涂涂层的组织与耐磨性

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-1-19-26

G. A. Pribytkov, V. I. Kalita, D. I. Komlev, A. Baranovskiy, A. Radyuk, M. Krinitcyn, A. Ivannikov, V. Korzhova, A. B. Mikhaylova

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Correlation between the characteristics of initial and end materials of copper nanopowder 纳米铜粉初始材料与末端材料特性的相关性

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2019-4-70-77

E. N. Sidorova, A. Ten, I. A. Iliinykh, E. Dzidziguri

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Properties of coatings based on cerium dioxide produced by magnetron sputtering 磁控溅射制备二氧化铈涂层的性能研究

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2023-1-64-74

A. S. Baikin, E. O. Nasakina, A. Kolmakov, K. V. Sergienko, M. Sudarchikova, M. Sevostyanov

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Deposition of superhard Ti-C-N plasma coatings in nitrogen atmosphere 超硬Ti-C-N等离子体膜在氮气气氛中的沉积

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2020-5-44-48

D. Gerasimov, A. Sivkov

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Synthesis of Al – Fe/SiO2 and Al – Co/SiO2 catalysts by solid-phase method 固相法合成Al - Fe/SiO2和Al - Co/SiO2催化剂

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI: 10.30791/0015-3214-2021-2-72-79

V. Artyukh, V. Borshch, V. Yusupov, S. Zhuk, V. Zelensky, B. Belelyubsky

{"title":"Synthesis of Al – Fe/SiO2 and Al – Co/SiO2 catalysts by solid-phase method","authors":"V. Artyukh, V. Borshch, V. Yusupov, S. Zhuk, V. Zelensky, B. Belelyubsky","doi":"10.30791/0015-3214-2021-2-72-79","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-2-72-79","url":null,"abstract":"Powders of catalysts from aluminides Fe and Co on a SiO2 support (33.3 wt. %) were obtained by mechano-thermal synthesis. The formation of large powder fractions (> 100 μm) was experimentally established. The fractions of these fractions for Fe – Al – SiO2 and Co – Al – SiO2 respectively amounted to ~ 43 % and ~ 55 %, which is a positive result for further catalytic studies. After annealing the powders at 700 and 900 °C in vacuum, the SiO2 support and compounds: Co27Al73 (close in composition to CoAl3, Co4Al13 type intermetallic compounds), Fe3Al intermetallic compound with iron silicide type Fe0.9Si0.1 and compound Al0,3Fe3Si0.7 in small volumes. On the synthesis of cobalt aluminides, a conclusion has been made about more efficient annealing at 900 °C than at 700 °C. For Fe – Al – SiO2 powders, it is advisable to anneal in the temperature range 700 – 750 °C with the assumption that the SiO2 support influences the thermosynthesis of iron aluminides. An experimental analysis of the morphology and elemental composition of the surface of the obtained samples is presented. It was found that the catalyst powders have medium sphericity and angularity. Fe – Al – SiO2 powders have a more developed surface than Co – Al – SiO2. Lower intermetallics are predominantly formed on the surface of the Co – Al – SiO2 sample. The correction of the mechanical alloying modes by means of the fragmentation of the process, changes in the intensity of its parameters, and various annealing conditions for Co – Al – SiO2 and Fe – Al – SiO2 are proposed.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"2 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":"128926540","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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