Now showing items 1061-1070 of 1075
Minimum component multiple integrator loop OTA-grounded capacitor all-pole filters
This paper addresses multiple loop feedback minimum component OTA-grounded capacitor all-pole filters. A general theory and its formulation are presented. It is shown that many new interesting configurations can be produced, ...
Simultaneous carburisation and oxidation of niobium in the presence of carbon monoxide
During reaction with CO, niobium was observed to carburise and oxidise simultaneously, with NbC, NbO and NbO forming as intermediate products before complete conversion to NbC. It was shown that the reason for such a complex ...
The production of precision silicon micromachined non-spherical particles for aerosol studies
A variety of accurately defined non-spherical particles have been produced in silicon dioxide and polycrystalline silicon using the process of silicon micromachining. The particles are of lengths 3μm, 4.5μm, 7.5μm, and ...
The observation of metastable molybdenum carbides
Re-evaluation of the thermodynamic stability of calcium oxide
The reaction CaO+3C = CaC+CO was studied under controlled atmospheres between 1580°C and 1700°C. Reaction was observed to take place at CO pressures higher than those predicted by the available thermodynamic data. By ...
Formation of silicon carbide whiskers and their microstructure
Thermodynamic and kinetic conditions for the formation of SiC whiskers are established. The mechanism of their nucleation and growth are studied and, on this basis, the magnitude of the thermally activated barrier is ...
Assessment of the fatigue life in relation to cylinder-nozzle corner cracks
Based on former studies this paper deals with both the front shape variation of nozzle corner cracks and the calculation of crack propagation rates. An approximate method describing fatigue crack growth at nozzle corners ...