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

Publication de 4  numéros par an

ISSN Imprimer: 1093-3611

ISSN En ligne: 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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INDUSTRIAL APPLICATIONS WITH THE ATMOSPHERE AND TEMPERATURE CONTROLLED PLASMA SPRAYING PROCESS

Volume 5, Numéro 1, 2001, 10 pages
DOI: 10.1615/HighTempMatProc.v5.i1.40
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RÉSUMÉ

Initially, the Atmosphere and Temperature Controlled (A.T.C.) Plasma Spraying Process was developed to successfully deposit oxygen-sensitive materials on heat-sensitive substrates. The development of the three following industrial applications will be considered:

- double coatings onto small complex geometrical shapes
- freestanding B4C louvers to protect the walls of a chamber containing a high-powered laser
- large freestanding manufactured pieces, as for example, the ceramic carriers for an X-ray telescope.
The first application is a classical use of the A.T.C. process: a ceramic deposition was obtained using a ternary Ar/H2/He plasma gas mixture on a heat-sensitive substrate with rapid cooling using liquid CO2. This cooling process was required to maintain the substrate surface temperature at 35 C in order to avoid a difference of thermal dilation between the substrate and the coating. Particular care was given to the programming of the displacement of the robot for spraying and cooling because of the complex geometrical shape of the substrate.
The two other applications use the plasma forming technique to obtain freestanding workpieces. In the first case, the production of B4C ultra high-density workpieces required a high powered Ar/H2 plasma in an oxygen free enclosure. Consequently, to limit thermal stresses, a rapid liquid argon cooling process was required. In the second case, the same technique was used to produce 600 mm wide Al2O3-TiO2 freestanding workpieces that were the lightest and stiffest possible. Here, the cooling was done with liquid CO2 while the plasma spraying conditions were also with Ar/H2 gas.

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