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Laser ablation behavior of SiHfC-based ceramics prepared from a single-source precursor: Effects of Hf-incorporation into SiC

Wen, Qingbo and Luan, Xingang and Wang, Lei and Xu, Xinming and Ionescu, Emanuel and Riedel, Ralf (2019):
Laser ablation behavior of SiHfC-based ceramics prepared from a single-source precursor: Effects of Hf-incorporation into SiC.
In: Journal of the European Ceramic Society, Elsevier Science Ltd, England, pp. 2018-2027, 39, (6), ISSN 09552219, DOI: 10.1016/j.jeurceramsoc.2019.01.040, [Online-Edition: https://www.sciencedirect.com/science/article/abs/pii/S09552...],
[Article]

Abstract

Laser ablation test of SiHfC-based ceramic nanocomposites as well as ceramic matrix composites (CMCs) was conducted by exposure to a CO2 laser beam in air. Laser ablation behavior and possible degradation mechanisms of dense monolithic HfC/SiC ceramic nanocomposites as well as of C-f/SiHfC CMCs were investigated. Dense SiC monoliths and C-f/SiC CMCs were exposed to same laser ablation conditions and considered as reference materials. The evolution of microstructure and chemical/phase composition of the studied ceramics was addressed by scanning electron microscopy (SEM) combined with energy dispersive X-ray spectroscopy (EDX) as well as by X-ray diffraction. The results reveal that from the center to the edge of the damaged region of the materials three sections with different surface morphologies and ablation mechanisms are identified. The comparation between the SiC-based monoliths and CMCs with and without Hf demonstrates the positive effects of Hf-incorporation on their laser ablation resistance.

Item Type: Article
Erschienen: 2019
Creators: Wen, Qingbo and Luan, Xingang and Wang, Lei and Xu, Xinming and Ionescu, Emanuel and Riedel, Ralf
Title: Laser ablation behavior of SiHfC-based ceramics prepared from a single-source precursor: Effects of Hf-incorporation into SiC
Language: English
Abstract:

Laser ablation test of SiHfC-based ceramic nanocomposites as well as ceramic matrix composites (CMCs) was conducted by exposure to a CO2 laser beam in air. Laser ablation behavior and possible degradation mechanisms of dense monolithic HfC/SiC ceramic nanocomposites as well as of C-f/SiHfC CMCs were investigated. Dense SiC monoliths and C-f/SiC CMCs were exposed to same laser ablation conditions and considered as reference materials. The evolution of microstructure and chemical/phase composition of the studied ceramics was addressed by scanning electron microscopy (SEM) combined with energy dispersive X-ray spectroscopy (EDX) as well as by X-ray diffraction. The results reveal that from the center to the edge of the damaged region of the materials three sections with different surface morphologies and ablation mechanisms are identified. The comparation between the SiC-based monoliths and CMCs with and without Hf demonstrates the positive effects of Hf-incorporation on their laser ablation resistance.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 39
Number: 6
Publisher: Elsevier Science Ltd, England
Uncontrolled Keywords: Laser ablation; Ablation mechanism; HfC/SiC nanocomposites; C-f/SiHfC; UHT CMCs SILICON-CARBIDE; OXIDATION RESISTANCE; NANOCOMPOSITES; COMPOSITES; PHASE; ZRB2
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Profile Areas
Profile Areas > From Material to Product Innovation (PMP
Date Deposited: 23 Apr 2019 05:30
DOI: 10.1016/j.jeurceramsoc.2019.01.040
Official URL: https://www.sciencedirect.com/science/article/abs/pii/S09552...
Funders: Technische Universitat Darmstadt "From Material to Product Innovation (PMP)", National Key Research and Development Program of China, 2017YFB0703200, R&D Convergence Program of MSIP (Ministry of Science, ICT and Future Planning) of Republic of Korea, CMIP-13-4-KIMS, NST (National Research Council of Science & Technology) of Republic of Korea, CMIP-13-4-KIMS, EU COST Action, CM1302
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