Energetics and stability of nanostructured amorphous carbon

Monte Carlo simulations, supplemented by ab initio calculations, shed light into the energetics and thermodynamic stability of nanostructured amorphous carbon. The interaction of the embedded nanocrystals with the host amorphous matrix is shown to determine in a large degree the stability and the relative energy differences among carbon phases. Diamonds are stable structures in matrices with sp^3 fraction over 60%. Schwarzites are stable in low-coordinated networks. Other sp^2-bonded structures are metastable.Comment: 11 pages, 7 figure

Waveform detection technique for indirect rotor-position sensing of switched-reluctance motor drives part 1: analysis

IEE Proceedings B: Electric Power Applications140180-88IPPA

Waveform detection technique for indirect rotor-position sensing of switched-reluctance motor drives part 2: experimental results

IEE Proceedings B: Electric Power Applications140189-96IPPA

Structural and mechanical characterization of carbon nanocomposite film

Hydrogen-free amorphous carbon films with hardness comparable to crystalline superhard materials have been deposited by special pulsed arc techniques. With the combination of very high hardness, hig smoothness, and low adhesion activity to other materials which are in contact with them, these films show superior behavior in wear and slide applications. The influence of plasma and deposition conditions on these film properties and the choice of optimum conditions are discussed