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Preparation of dense SiHf(B)CN-based ceramic nanocomposites via rapid spark plasma sintering

Yuan, Jia and Li, Duan and Johanns, Kurt E. and Fasel, Claudia and Durst, Karsten and Kleebe, Hans-Joachim and Shen, Zhijian and Riedel, Ralf and Ionescu, Emanuel (2017):
Preparation of dense SiHf(B)CN-based ceramic nanocomposites via rapid spark plasma sintering.
In: Journal of the European Ceramic Society, Elsevier Science Publishing, pp. 5157-5165, 37, (16), ISSN 09552219, DOI: 10.1016/j.jeurceramsoc.2017.04.066, [Online-Edition: https://doi.org/10.1016/j.jeurceramsoc.2017.04.066],
[Article]

Abstract

Dense SiHf(B)CN-based ceramic nanocomposites were prepared by spark plasma sintering (SPS) using high heating rates (∼450 °C/min.) and high pressures (≥100 MPa). The obtained nanocomposites were investigated by X-ray diffraction, Raman spectroscopy and electron microscopy concerning their phase evolution and microstructure.

The hardness and the elastic modulus of dense SiHfCN were found to be 26.8 and 367 GPa, respectively. Whereas the SiHfBCN samples exhibited a hardness of 24.6 GPa and an elastic modulus of 284 GPa. The investigation of the oxidation of the prepared dense ceramic nanocomposites at high temperature revealed that the parabolic oxidation rates of SiHfCN were comparable to those of ultra-high temperature ceramics (UHTCs, e.g. HfC-20 vol% SiC); whereas the parabolic oxidation rates of SiHfBCN were several orders of magnitude lower than those. The results obtained within this study indicate the feasibility of SPS for rapid preparation of dense though nano-scaled Hf-containing ceramic nanocomposites that are promising candidates for high-temperature applications in harsh Environments.

Item Type: Article
Erschienen: 2017
Creators: Yuan, Jia and Li, Duan and Johanns, Kurt E. and Fasel, Claudia and Durst, Karsten and Kleebe, Hans-Joachim and Shen, Zhijian and Riedel, Ralf and Ionescu, Emanuel
Title: Preparation of dense SiHf(B)CN-based ceramic nanocomposites via rapid spark plasma sintering
Language: English
Abstract:

Dense SiHf(B)CN-based ceramic nanocomposites were prepared by spark plasma sintering (SPS) using high heating rates (∼450 °C/min.) and high pressures (≥100 MPa). The obtained nanocomposites were investigated by X-ray diffraction, Raman spectroscopy and electron microscopy concerning their phase evolution and microstructure.

The hardness and the elastic modulus of dense SiHfCN were found to be 26.8 and 367 GPa, respectively. Whereas the SiHfBCN samples exhibited a hardness of 24.6 GPa and an elastic modulus of 284 GPa. The investigation of the oxidation of the prepared dense ceramic nanocomposites at high temperature revealed that the parabolic oxidation rates of SiHfCN were comparable to those of ultra-high temperature ceramics (UHTCs, e.g. HfC-20 vol% SiC); whereas the parabolic oxidation rates of SiHfBCN were several orders of magnitude lower than those. The results obtained within this study indicate the feasibility of SPS for rapid preparation of dense though nano-scaled Hf-containing ceramic nanocomposites that are promising candidates for high-temperature applications in harsh Environments.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 37
Number: 16
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: High-temperature stable ceramics nanocomposites, SiHfBCN, Rapid sintering, Mechanical properties, High-temperature oxidation
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science > Physical Metallurgy
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 27 Dec 2017 08:44
DOI: 10.1016/j.jeurceramsoc.2017.04.066
Official URL: https://doi.org/10.1016/j.jeurceramsoc.2017.04.066
Funders: J.Y. acknowledges financial support from China Scholarship Council (CSC) during his stay at TU Darmstadt., Financial support from European Commission through the Marie-Curie ITN project “Functional Nitrides for Energy Applications, FUNEA” (FP7-PITN-GA-2010-264873) is gratefully acknowledged., Financial support from R&D Convergence Program of MSIP (Ministry of Science, ICT and Future Planning) and NST (National Research Council of Science & Technology) of Republic of Korea (Grant: CMIP-13-4-KIMS) is gratefully acknowledged., E.I. furthermore acknowledges the European Network “Smart Inorganic Polymers” (SIPs, EU COST Action CM 1302).
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