Project Details
Projekt
High-Pressure Synthesis of Novel Binary and Ternary Superhard Phases in the Si-C-N System
Applicants
Professor Dr. Peter Kroll; Professor Ralf Riedel
Subject Area
Mineralogy, Petrology and Geochemistry
Term
from 2006 to 2010
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 25556758
The scientific goals of the project are:(1) Synthesis of novel binary and ternary superhard phases in the Si-C-N system at high pressures and high temperatures. (2) Study of their physico-chemical, structural and bonding properties, the equations of state and phase stability, as well as mechanical and electronic properties In the proposed research, the formation of novel binary and ternary superhard phases in the Si¿ C¿N ternary system will be systematically examined under extreme conditions. In order to reach wide pressure and temperature ranges up to 50 GPa and 2000 °C we will use a laser heated diamond anvil cell (LH-DAC). The structures and properties of the samples will be analyzed in situ by synchrotron radiation, IR- and Raman spectroscopy and ex situ by powder X-ray diffraction, IR- and Raman spectroscopy, transmission electron microscopy and electron energy- loss spectroscopy. Moreover, by each step in the proposed project the theoretical calculations can support the experimental development.
DFG Programme
Priority Programmes
