Schwarz, Marcus Rolf (2005)
High Pressure Synthesis of Novel Hard Materials: Spinel-Si3N4 and Derivates.
Technische Universität Darmstadt
Dissertation, Bibliographie
Kurzbeschreibung (Abstract)
The scope of this dissertation was to explore the newly discovered cubic spinel modification of silicon nitride (γ-Si3N4). It includes the synthesis of γ-Si3N4 specimen via different high-pressure–high-temperature (HP/HT) techniques in order to assess basic structural, physical (and chemical) properties. Special attention is paid to the potential of γ-Si3N4 as a hard material. Own measurements as well as results of other researchers on this quickly growing field of spinel nitrides are presented and will be discussed. In the course of the investigations, a first set of oxide nitride derivatives of γ-Si3N4 within the system Si–Al–O–N and related multinary systems was discovered and characterized. The acquired data should enable to evaluate the suitability of these materials as cutting materials, abrasives or in other structural or functional applications. Below, the importance of synthetic hard materials will be outlined in a brief historical review. The concept of the HP/HT approach to produce highly condensed materials with superior properties will be considered on the basis of the physics of hardness in subsequent sections. The additional prerequisites for “useful” hard materials will be treated at the end of this first chapter.
| Typ des Eintrags: | Dissertation |
|---|---|
| Erschienen: | 2005 |
| Autor(en): | Schwarz, Marcus Rolf |
| Art des Eintrags: | Bibliographie |
| Titel: | High Pressure Synthesis of Novel Hard Materials: Spinel-Si3N4 and Derivates |
| Sprache: | Englisch |
| Referenten: | Riedel, Prof. Dr. Ralf ; Fueß, Prof. Dr. Hartmut |
| Publikationsjahr: | Januar 2005 |
| Ort: | Darmstadt |
| Verlag: | kassel university press GmbH |
| Datum der mündlichen Prüfung: | 11 November 2003 |
| URL / URN: | http://www.upress.uni-kassel.de/katalog/abstract.php?978-3-8... |
| Kurzbeschreibung (Abstract): | The scope of this dissertation was to explore the newly discovered cubic spinel modification of silicon nitride (γ-Si3N4). It includes the synthesis of γ-Si3N4 specimen via different high-pressure–high-temperature (HP/HT) techniques in order to assess basic structural, physical (and chemical) properties. Special attention is paid to the potential of γ-Si3N4 as a hard material. Own measurements as well as results of other researchers on this quickly growing field of spinel nitrides are presented and will be discussed. In the course of the investigations, a first set of oxide nitride derivatives of γ-Si3N4 within the system Si–Al–O–N and related multinary systems was discovered and characterized. The acquired data should enable to evaluate the suitability of these materials as cutting materials, abrasives or in other structural or functional applications. Below, the importance of synthetic hard materials will be outlined in a brief historical review. The concept of the HP/HT approach to produce highly condensed materials with superior properties will be considered on the basis of the physics of hardness in subsequent sections. The additional prerequisites for “useful” hard materials will be treated at the end of this first chapter. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 17 Jul 2018 08:42 |
| Letzte Änderung: | 07 Aug 2018 10:24 |
| PPN: | |
| Referenten: | Riedel, Prof. Dr. Ralf ; Fueß, Prof. Dr. Hartmut |
| Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 11 November 2003 |
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