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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

Indexed in

UNDERSTANDING OF SUSPENSION PLASMA SPRAYING

Volume 8, Edição 1, 2004, pp. 95-117
DOI: 10.1615/HighTempMatProc.v8.i1.60
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RESUMO

The aim of this paper is to present the recent advances regarding the Suspension Plasma Spraying process (SPS). The latter is devoted to synthesize finely structured coatings which are of great interest for the electrolytes (of low thickness, 20-30 μm) of Solid Oxide Fuel Cells (SOFC). Powders of Yttria (13.5wt%) Stabilised Zirconia (YSZ) are dispersed in ethanol to produce a stable suspension. The latter is injected by using a mechanical injection into a plasma jet generated by a DC plasma torch. Four centimetre square coatings are built with a deposition efficiency ranging between 50 and 60 % and a deposition rate up to 15 μm.h−1.m−2.
The injection pressure of suspensions is optimized by using a pulsed infra-red illumination of the atomization processes of suspensions which is observed with a fast shutter camera.
The influences of the preheating and roughness of the substrates, the plasma gas composition and the particle size distribution on the flattening degree of collected splats are investigated. Moreover, the effect of these experimental parameters on the coating microstructures is then studied. It is shown that substrates have to be polished and preheated to enable the most favorable flattening of splats. Moreover, the particle size distribution of powder in suspension has to be narrow with a size adapted to the spraying conditions, for example, centered on about l μm for a plasma enthalpy of 17.5 MJ.kg−1. The results about splats are confirmed when analyzing coating microstructures which present micro-sized porosity.

CITADO POR
  1. Fauchais P., Rat V., Delbos C., Coudert J.F., Chartier T., Bianchi L., Understanding of suspension DC plasma spraying of finely structured coatings for SOFC, IEEE Transactions on Plasma Science, 33, 2, 2005. Crossref

  2. Ravi B.G., Gandhi Ashutosh S., Guo X.Z., Margolies J., Sampath S., Liquid Precursor Plasma Spraying of Functional Materials: A Case Study for Yttrium Aluminum Garnet (YAG), Journal of Thermal Spray Technology, 17, 1, 2008. Crossref

  3. Waldbillig D., Kesler O., Characterization of metal-supported axial injection plasma sprayed solid oxide fuel cells with aqueous suspension plasma sprayed electrolyte layers, Journal of Power Sources, 191, 2, 2009. Crossref

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  5. Fauchais Pierre, Vardelle Armelle, Thermal Plasmas Surface Treatment, in Materials Surface Processing by Directed Energy Techniques, 2006. Crossref

  6. Zou Zhonghua, Donoghue Jack, Curry Nicholas, Yang Lixia, Guo Fangwei, Nylén Per, Zhao Xiaofeng, Xiao Ping, A comparative study on the performance of suspension plasma sprayed thermal barrier coatings with different bond coat systems, Surface and Coatings Technology, 275, 2015. Crossref

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