Thor, Nathalie ; Winkens, Georg ; Bernauer, Jan ; Petry, Nils‐Christian ; Beck, Katharina ; Wang, Jin ; Schwaiger, Ruth ; Riedel, Ralf ; Kolb, Ute ; Lepple, Maren ; Pundt, Astrid (2024)
Microstructure Characterization and Mechanical Properties of Polymer‐Derived (HfₓTa₁₋ₓ)C/SiC Ceramic Prepared upon Field‐Assisted Sintering Technique/Spark Plasma Sintering.
In: Advanced Engineering Materials, 2024, 26 (17)
doi: 10.26083/tuprints-00028273
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
The high‐temperature microstructural evolution and mechanical properties of two SiC‐based polymer‐derived ceramics with different Hf:Ta molar ratios are investigated using electron microscopy techniques and manipulated by nanoindentation. The as‐pyrolyzed ceramic powder consists of an amorphous Si(HfₓTa₁₋ₓ)C(N,O) structure (where x = 0.2, 0.7) with localized nanocrystalline transition metal carbides (TMCs). Subsequent application of the field‐assisted sintering technique (FAST) for high‐temperature consolidation results in a crystalline (HfₓTa₁₋ₓ)C/SiC ultra‐high temperature ceramic nanocomposite. The microstructure contains powder particle‐sized grains and sinter necks between the former powder particles. The powder particles consist of a β‐SiC matrix and small TMCs. Large TMCs are observed on the internal surfaces of former powder particles. This is due to the pulsed direct current and the resulting Joule heating that facilitates diffusion as well as oxygen impurities. Sinter necks of large β‐SiC grains form during the FAST process. The microstructural regions are assessed using high‐throughput nanoindentation. The hardness for SiC/(Hf₀.₇Ta₀.₃)C is measured on the formed grains and the sinter necks giving mean hardness values of about 27 and 37 GPa, respectively.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Thor, Nathalie ; Winkens, Georg ; Bernauer, Jan ; Petry, Nils‐Christian ; Beck, Katharina ; Wang, Jin ; Schwaiger, Ruth ; Riedel, Ralf ; Kolb, Ute ; Lepple, Maren ; Pundt, Astrid |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Microstructure Characterization and Mechanical Properties of Polymer‐Derived (HfₓTa₁₋ₓ)C/SiC Ceramic Prepared upon Field‐Assisted Sintering Technique/Spark Plasma Sintering |
| Sprache: | Englisch |
| Publikationsjahr: | 27 November 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | September 2024 |
| Ort der Erstveröffentlichung: | Weinheim |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Engineering Materials |
| Jahrgang/Volume einer Zeitschrift: | 26 |
| (Heft-)Nummer: | 17 |
| Kollation: | 17 Seiten |
| DOI: | 10.26083/tuprints-00028273 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/28273 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | The high‐temperature microstructural evolution and mechanical properties of two SiC‐based polymer‐derived ceramics with different Hf:Ta molar ratios are investigated using electron microscopy techniques and manipulated by nanoindentation. The as‐pyrolyzed ceramic powder consists of an amorphous Si(HfₓTa₁₋ₓ)C(N,O) structure (where x = 0.2, 0.7) with localized nanocrystalline transition metal carbides (TMCs). Subsequent application of the field‐assisted sintering technique (FAST) for high‐temperature consolidation results in a crystalline (HfₓTa₁₋ₓ)C/SiC ultra‐high temperature ceramic nanocomposite. The microstructure contains powder particle‐sized grains and sinter necks between the former powder particles. The powder particles consist of a β‐SiC matrix and small TMCs. Large TMCs are observed on the internal surfaces of former powder particles. This is due to the pulsed direct current and the resulting Joule heating that facilitates diffusion as well as oxygen impurities. Sinter necks of large β‐SiC grains form during the FAST process. The microstructural regions are assessed using high‐throughput nanoindentation. The hardness for SiC/(Hf₀.₇Ta₀.₃)C is measured on the formed grains and the sinter necks giving mean hardness values of about 27 and 37 GPa, respectively. |
| Freie Schlagworte: | field‐assisted sintering technique, microstructures, nanoindentation, polymer‐derived ceramics, silicon carbide, transition metal carbides, ultra‐high temperature ceramics |
| ID-Nummer: | Artikel-ID: 2301841 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-282735 |
| Zusätzliche Informationen: | Special Issue: Materials Compounds from Composite Materials for Applications in Extreme Conditions |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 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 > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Werkstofftechnik und Ressourcenmanagement |
| Hinterlegungsdatum: | 27 Nov 2024 12:33 |
| Letzte Änderung: | 28 Nov 2024 06:58 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
- Microstructure Characterization and Mechanical Properties of Polymer‐Derived (HfₓTa₁₋ₓ)C/SiC Ceramic Prepared upon Field‐Assisted Sintering Technique/Spark Plasma Sintering. (deposited 27 Nov 2024 12:33) [Gegenwärtig angezeigt]
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