Microstructure evolution in amorphous Hf–B–Si–C–N high temperature resistant coatings after annealing to 1500 °C in air

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F19%3A43954891" target="_blank" >RIV/49777513:23520/19:43954891 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1038/s41598-019-40428-6" target="_blank" >https://doi.org/10.1038/s41598-019-40428-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-019-40428-6" target="_blank" >10.1038/s41598-019-40428-6</a>

Result language

angličtina

Original language name

Microstructure evolution in amorphous Hf–B–Si–C–N high temperature resistant coatings after annealing to 1500 °C in air

Original language description

Recently, amorphous Hf–B–Si–C–N coatings found to demonstrate superior high-temperature oxidation resistance. The microstructure evolution of two coatings, Hf7B23Si22C6N40 and Hf6B21Si19C4N47, annealed to 1500 °C in air is investigated to understand their high oxidation resistance. The annealed coatings develop a two-layered structure comprising of the original as-deposited film followed by an oxidized layer. In both films, the oxidized layer possesses the same microstructure with HfO2 nanoparticles dispersed in an amorphous SiOx-based matrix. The bottom layer in the Hf6B21Si19C4N47 coating remains amorphous after annealing while Hf7B23Si22C6N40 recrystallized partially showing a nanocrystalline structure of HfB2 and HfN nanoparticles separated by h-Si3N4 and h-BN boundaries. The HfB2 and HfN nanostructures form a sandwich structure with a HfB2 strip being atomically coherent to HfN skins via (111)-Hf monolayers. In spite of the different bottom layer structure, the oxidized/bottom layer interface of both films was found to exhibit a similar microstructure with a fine distribution of HfO2 nanoparticles surrounded by SiO2 quartz boundaries. The high-temperature oxidation resistance of both films is attributed to the particular evolving microstructure consisting of HfO2 nanoparticles within a dense SiOx-based matrix and quartz SiO2 in front of the oxidized/bottom layer interface acting as a barrier for oxygen and thermal diffusion.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10700 - Other natural sciences

Project

<a href="/en/project/GA17-08944S" target="_blank" >GA17-08944S: Nanostructured coatings synthesized using highly reactive pulsed plasmas</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

—

Volume of the periodical

9

Issue of the periodical within the volume

5 MAR 2019

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

„3603-1“ - „3603-11“

UT code for WoS article

000460383600015

EID of the result in the Scopus database

2-s2.0-85062584666