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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

Publicou 4 edições por ano

ISSN Imprimir: 1093-3611

ISSN On-line: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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SYNTHESIS OF Sc3TaO7 COMPOUND AND MODELING THE MECHANISM OF PHASE TRANSFORMATIONS ON THERMAL EXPOSURE AND IRRADIATION BY XENON IONS

Volume 20, Edição 2, 2016, pp. 107-114
DOI: 10.1615/HighTempMatProc.2016017136
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RESUMO

Structural changes in samples of synthesized polycrystalline Sc3TaO7 compound of monoclinic modification during thermal exposure in vacuum in the temperature range 25−1800°C, followed by irradiation of samples by xenon ions with energies of 140 and 300 keV, have been studied by X-ray methods. The monoclinic modification was stable during thermal vacuum heating from 25 to 1700°C. The parameters of the lattice of monoclinic modification were measured, the thermal expansion coefficients and their energies were determined in the indicated temperature range. The thermal expansion of the monoclinic cell exhibits a noticeable anisotropy. A phase transformation occurs in vacuum at 1800°C, which leads to monoclinic modification transformation to a tetragonal phase accompanied by the formation of a change in the chemical composition of the compound and by the appearance of defects in the lattice, anion vacancies, and color centers. After irradiation of such samples with ions of xenon with different energies, macro- and micro-tensions appear in the structure that substantially depend on the energy of irradiation over the depth of a sample. The presence of defects in the structure of a compound and their strengthening leads to an anomalous increase in the relative integral intensity of X rays reflected from the surfaces of the cell over the depth of the sample. Mathematical models of the formation of defects in the structure of a compound on thermal and ionic irradiation have been developed and their relationship is shown.

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