Bernauer, Jan ; Petry, Nils‐Christian ; Thor, Nathalie ; Kredel, Samuel Aeneas ; Teppala, Dharma Teja ; Galetz, Mathias ; Lepple, Maren ; Pundt, Astrid ; Ionescu, Emanuel ; Riedel, Ralf (2024)
Exceptional hardness and thermal properties of SiC/(Hf,Ta)C(N)/(B)C ceramic composites derived from single‐source precursor.
In: Advanced Engineering Materials, 26 (17)
doi: 10.1002/adem.202301864
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
In the present work, monolithic SiC/(Hf₀.₇₅Ta₀.₂₅)C(N)/(B)C ceramic composites are prepared via spark plasma sintering of amorphous SiHfTa(B)CN‐based powders synthesized from single‐source precursors. The as‐sintered ceramic nanocomposites are investigated by X‐ray diffraction, Raman, scanning electron microscopy, and transmission electron microscopy in order to study their microstructure and chemical composition. Furthermore, the thermal conductivity, the thermal expansion, as well as the hardness and Young's moduli of the prepared monolithic samples are determined. The incorporation of boron in the system results in enhanced densification due to decreased porosity and improved distribution of the individual phases in the composite after sintering. These favorable effects also positively influence the thermomechanical properties of the composite. The boron‐modified sample displays a decreased thermal diffusivity and conductivity compared with the boron‐free sample. Additionally, a macro‐hardness obtained by Vickers indentation of 31 GPa is achieved for loads up to 196 N, surpassing the hardness of ultrahard materials like silicon carbide, hafnium carbide, and tantalum carbide as well as their solid solutions. Young's moduli of the composites were analyzed to 405 ± 10 and 277.5 ± 41 GPa for the boron‐containing and boron‐free samples, respectively.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Bernauer, Jan ; Petry, Nils‐Christian ; Thor, Nathalie ; Kredel, Samuel Aeneas ; Teppala, Dharma Teja ; Galetz, Mathias ; Lepple, Maren ; Pundt, Astrid ; Ionescu, Emanuel ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Exceptional hardness and thermal properties of SiC/(Hf,Ta)C(N)/(B)C ceramic composites derived from single‐source precursor |
| Sprache: | Englisch |
| Publikationsjahr: | September 2024 |
| Ort: | Weinheim |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Engineering Materials |
| Jahrgang/Volume einer Zeitschrift: | 26 |
| (Heft-)Nummer: | 17 |
| Kollation: | 11 Seiten |
| DOI: | 10.1002/adem.202301864 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | In the present work, monolithic SiC/(Hf₀.₇₅Ta₀.₂₅)C(N)/(B)C ceramic composites are prepared via spark plasma sintering of amorphous SiHfTa(B)CN‐based powders synthesized from single‐source precursors. The as‐sintered ceramic nanocomposites are investigated by X‐ray diffraction, Raman, scanning electron microscopy, and transmission electron microscopy in order to study their microstructure and chemical composition. Furthermore, the thermal conductivity, the thermal expansion, as well as the hardness and Young's moduli of the prepared monolithic samples are determined. The incorporation of boron in the system results in enhanced densification due to decreased porosity and improved distribution of the individual phases in the composite after sintering. These favorable effects also positively influence the thermomechanical properties of the composite. The boron‐modified sample displays a decreased thermal diffusivity and conductivity compared with the boron‐free sample. Additionally, a macro‐hardness obtained by Vickers indentation of 31 GPa is achieved for loads up to 196 N, surpassing the hardness of ultrahard materials like silicon carbide, hafnium carbide, and tantalum carbide as well as their solid solutions. Young's moduli of the composites were analyzed to 405 ± 10 and 277.5 ± 41 GPa for the boron‐containing and boron‐free samples, respectively. |
| Freie Schlagworte: | precursor‐derived ceramics, spark plasma sintering, thermomechanical properties of SiC‐composites |
| ID-Nummer: | Artikel-ID: 2301864 |
| Zusätzliche Informationen: | Special Issue: Materials Compounds from Composite Materials for Applications in Extreme Conditions |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften 600 Technik, Medizin, angewandte Wissenschaften > 660 Technische Chemie |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Geomaterialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Werkstofftechnik und Ressourcenmanagement |
| Hinterlegungsdatum: | 05 Nov 2024 06:48 |
| Letzte Änderung: | 05 Nov 2024 13:54 |
| PPN: | 523188293 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Exceptional Hardness and Thermal Properties of SiC/(Hf,Ta)C(N)/(B)C Ceramic Composites Derived from Single‐Source Precursor. (deposited 04 Nov 2024 13:10)
- Exceptional hardness and thermal properties of SiC/(Hf,Ta)C(N)/(B)C ceramic composites derived from single‐source precursor. (deposited 05 Nov 2024 06:48) [Gegenwärtig angezeigt]
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