Boron Nitride
Mostrando 25-29 de 29 artigos, teses e dissertações.
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25. Caracteristicas da usinagem de um composito de resina fenolica reforçada com fibras de vidro e carbono
Some experiments were carried out to study the performance of many different tool materials, like pure ceramic (AI203+Zr02), mixed ceramic (A1203+TiC) , SIALON (A1203+SbN4) , whiskers reinforced ceramic (AI203+sic) , cemented carbide ISO K10, cubic boron nitride (CBN), o and diamond (PCD). They were tested in turning of carbon and glass fiber reinforced feno
Publicado em: 1992
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26. Fotocondutividade no nitreto de silicio amorfo hidrogenado não estiquiometrico
The off-stoichiometric amorphous hydrogenated silicon nitride (a-SiNx:H) has been studied in the last few years due to its possible applications in photovoltaic devices in many laboratories in the world. In the present work we present the results of measurements of photoconductivity versus temperature and light intensity in material prepared by glow discharg
Publicado em: 1985
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27. THE STRUCTURE AND PROPERTIES OF GRAPHITE AND BORON NITRIDE
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28. Two-dimensional atomic crystals
We report free-standing atomic crystals that are strictly 2D and can be viewed as individual atomic planes pulled out of bulk crystals or as unrolled single-wall nanotubes. By using micromechanical cleavage, we have prepared and studied a variety of 2D crystals including single layers of boron nitride, graphite, several dichalcogenides, and complex oxides. T
National Academy of Sciences.
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29. Hard superconducting nitrides
Detailed study of the equation of state, elasticity, and hardness of selected superconducting transition-metal nitrides reveals interesting correlations among their physical properties. Both the bulk modulus and Vickers hardness are found to decrease with increasing zero-pressure volume in NbN, HfN, and ZrN. The computed elastic constants from first principl
National Academy of Sciences.