Microstructure and oxidation resistance of composition gradients Nb-Si based alloy thin film

Wei Jiang; Meifeng Li; Jiangbo Sha; Chungen Zhou

Materials & Design (Jul 2020)

Microstructure and oxidation resistance of composition gradients Nb-Si based alloy thin film

Wei Jiang,
Meifeng Li,
Jiangbo Sha,
Chungen Zhou

Affiliations

Wei Jiang: Corresponding author.; Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
Meifeng Li: Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
Jiangbo Sha: Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
Chungen Zhou: Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

Journal volume & issue: Vol. 192
p. 108687

Abstract

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High-throughput methods were developed to prepare multicomponent NbSi based (NbxCryTizSi1-x-y-zAl0.5) alloy film combinatorial libraries (x = 0 → 0.95, y = 0 → [0.95-x], z = 0 → [0.95-x-y]) with composition gradients. Oxidation behavior of the as-deposited film was investigated in dry air at 1250 °C. The results show that the as-deposited film is consisted of a mixture of amorphous and crystalline phases. Crystallized film is composed Cr2Nb, Nb5Si3 and Nbss phases after annealing. The film after oxidation at 1250 °C for different times exhibits three regions of distinct oxidation behavior. The composition for establishment of a protective CrNbO4 scale across the entire film is determined rapidly.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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