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

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ISSN Печать: 1093-3611

ISSN Онлайн: 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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High Temperature Oxidation Morphology of Al-Si Coating on the Superalloy K438

Том 9, Выпуск 4, 2005, pp. 619-624
DOI: 10.1615/HighTempMatProc.v9.i4.110
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To increase the time of efficacy of aero engines, the technology of protective coatings is widely used on the aero engine turbine, in order to improve the high temperature oxidation resistance of alloys. This study uses hot diffusion to form Al-Si coating on superalloy K438. According to GB/T13303-91(The Standard of The Public of China: Steels Detemination Method of Oxidation Resistance), high temperature oxidation experiments of Al-Si coating on superalloy K438 were carried out at 1000 °C for 50hr. The surface morphology was studied by using SEM (XL-300FEG).It is concluded that in the process of high temperature oxidation, the Al-Si coating on superalloy K438 has formed continuous and compact oxide scale α-Al2O3 ,which would prevent oxygen permeating to the alloy substrate. This oxide scale α-Al2O3 has no cracks and did not peeled off. The addition of Si to the coating can effectively prevent diffusion between elements of substrate and those of coating. It acts as a diffusion barrier, prolongs the deterioration period of coating and provides excellent high temperature oxidation resistance.

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