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

Published 4 issues per year

ISSN Print: 1093-3611

ISSN Online: 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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ON THE OXIDATION OF Ni-23Co-17Cr-12AI-0.5Y-ALLOY SERVING AS BOND COAT IN THERMAL BARRIER COATINGS

Volume 4, Issue 3, 2000, 12 pages
DOI: 10.1615/HighTempMatProc.v4.i3.30
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ABSTRACT

Specimens of air plasma sprayed thermal barrier coatings with a Ni-23Co-17Cr-12Al-0.5Y bond coat have been oxidised in air at 900°C for 300-3000 hours. The oxide scale formed between the ceramic and the bond coat consists of essentially pure AI2O3, except at the interface with the ceramic overlay, where the composition of the oxide reflects that of the bond coat. The oxidation rate decreases with time and reflects growth of AI2O3, through inward grain boundary diffusion of oxygen. An inter-metallic phase identified as NiAl, precipitated during high temperature exposure. The thickness of the inter-metallic zone decreased with increasing oxidation duration. This was interpreted to reflect diffusion of Al toward the oxide and into the substrate. The amount of transient oxides at the surface was found to depend on the surface topography.

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