Ionescu, Emanuel ; Yuan, Jia ; Mainzer, Bernd ; Kleebe, Hans-Joachim ; Riedel, Ralf (2012)
Synthesis of Ultrahigh-Temperature Stable Hafnium-Containing Ceramic Nanocomposites.
In: Zeitschrift für anorganische und allgemeine Chemie, 638 (10)
doi: 10.1002/zaac.201203010
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Polymer-derived ceramic nanocomposites (PDC-NCs) can be synthesized via thermal conversion of suitable single-source precursors, leading in a first step to amorphous single-phase ceramics, which subsequently undergo phase separation pro- cesses to furnish bi- or multiphase ceramic nanocomposites. PDC-NCs have been shown to be excellent candidate materials suitable for applications at ultrahigh-temperatures and under harsh environments. [1,2] In the present work, amorphous SiHf(B)CN-based PDC-NCs were synthesized via cross-link- ing and ceramization of a polysilazane which was chemically modified by Hf(NEt2)4 and borane dimethylsulfide complex (BH3.SMe2). High-temperature annealing of the obtained amorphous SiHf(B)CN ceramics in nitrogen atmosphere led to HfN/Si(B)CN nanocom-posites; whereas HfB2/Si(B)CN was obtained upon annealing in argon atmosphere. The presented results emphasize a convenient preparative approach to nanos- tructured ultrahigh-temperature stable materials starting from a greatly flexible/compliant single-source precursor.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Ionescu, Emanuel ; Yuan, Jia ; Mainzer, Bernd ; Kleebe, Hans-Joachim ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Synthesis of Ultrahigh-Temperature Stable Hafnium-Containing Ceramic Nanocomposites |
| Sprache: | Englisch |
| Publikationsjahr: | 2012 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Zeitschrift für anorganische und allgemeine Chemie |
| Jahrgang/Volume einer Zeitschrift: | 638 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1002/zaac.201203010 |
| Kurzbeschreibung (Abstract): | Polymer-derived ceramic nanocomposites (PDC-NCs) can be synthesized via thermal conversion of suitable single-source precursors, leading in a first step to amorphous single-phase ceramics, which subsequently undergo phase separation pro- cesses to furnish bi- or multiphase ceramic nanocomposites. PDC-NCs have been shown to be excellent candidate materials suitable for applications at ultrahigh-temperatures and under harsh environments. [1,2] In the present work, amorphous SiHf(B)CN-based PDC-NCs were synthesized via cross-link- ing and ceramization of a polysilazane which was chemically modified by Hf(NEt2)4 and borane dimethylsulfide complex (BH3.SMe2). High-temperature annealing of the obtained amorphous SiHf(B)CN ceramics in nitrogen atmosphere led to HfN/Si(B)CN nanocom-posites; whereas HfB2/Si(B)CN was obtained upon annealing in argon atmosphere. The presented results emphasize a convenient preparative approach to nanos- tructured ultrahigh-temperature stable materials starting from a greatly flexible/compliant single-source precursor. |
| Freie Schlagworte: | ceramic nanocomposites, ultrahigh-temperature ceramics, hafnium nitride |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Geomaterialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 21 Mär 2013 08:35 |
| Letzte Änderung: | 21 Mär 2013 08:35 |
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