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

年間 4 号発行

ISSN 印刷: 1093-3611

ISSN オンライン: 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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CATALYCITY AND AGEING STUDY OF SPACE SHUTTLE MATERIAL: REGENERATION OF THEIR ORIGINAL CATALYTIC PROPERTIES

巻 13, 発行 3-4, 2009, pp. 413-425
DOI: 10.1615/HighTempMatProc.v13.i3-4.130
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要約

The heating of the space vehicle during the re-entry phase and the oxidation of the material surface leads to the loss of protective properties. The atmospheric re-entry conditions are recreated with a non equilibrium low pressure RF plasma and the relative oxygen atom concentration is measured by Actinometric Optical Spectroscopy. Silicon carbide targets polluted with metallic species show different degrees of reactivity than SiC alone [1].
In this work a systematic study of SiC oxidation at high temperature (1100K) has been performed in order to determine kinetic and the oxidation mechanisms. Also the role of chromium oxide as a diffusion barrier into the bulk is examined [2]. In order to determine the oxidation mechanisms the isotopic oxygen O218 has been used, in targets with different deposition layers at different times ranging from 10 to 30 min and the formation of CO, CO2 and SiO, during the ablation has been followed by mass spectrometry analysis. Surface oxidation and Oxygen diffusion in the material bulk was measured by Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS) [3], secondary ion mass spectroscopy (SIMS).
Besides the recombination of oxygen atoms, the ablation of the material and the diffusion of oxygen coming from the gas phase in the bulk of this material have been pointed out.
The results show that at 1300K the kinetic of oxidation is faster than at 1000K. In this range of temperatures chromium oxide remains stable and limits the diffusion of oxygen.

によって引用された
  1. Da Rold Guillaume, Guyon Cédric, Cavadias Siméon, Amouroux Jacques, Barriers of Oxidation ans Ageing of Space Shuttle Material, Advanced Materials Research, 89-91, 2010. Crossref

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