Navegação Ciências Exatas e da Terra por Assunto "Grafite"

Resultados 1-5 de 5

    • Amorphization of graphite flakes in gray cast iron under tribological load 

      Hinrichs, Ruth; Vasconcellos, Marcos Antonio Zen; Oesterle, Werner; Prietzel, Claudia (2018) [Artigo de periódico]
      A gray cast iron disc, which had been submitted to a heavy duty automotive brake test, was examined with energy filtered transmission electron microscopy. A graphite flake in a convenient angular position showed the shear ...

    • Few layer reduced graphene oxide : evaluation of the best experimental conditions for easy production 

      Pavoski, Giovani; Maraschin, Thuany Garcia; Fim, Fabiana de Carvalho; Balzaretti, Naira Maria; Galland, Griselda Ligia Barrera; Moura, Cassio Stein; Basso, Nara Regina de Souza (2017) [Artigo de periódico]
      This work aimed to produce graphene oxide with few graphene layers, a low number of defects, good conductivity and reasonable amount of oxygen, adequate for use as filler in polymeric composites. Two starting materials ...

    • Magnetism, magnetoresistance, and Shubnikov-de Haas oscillations in Na-implanted highly oriented pyrolitic graphite 

      Pires, Rafael Fernando; Pureur Neto, Paulo; Behar, Moni; Pimentel Junior, Jorge Luiz; Schaf, Jacob; Kopelevich, Y. (2012) [Artigo de periódico]
      We report on magnetization, magnetoresistance, and Shubnikov-de Haas oscillations experiments in Na-implanted samples of highly oriented pyrolitic graphite (HOPG). Different ion fluences were applied so that samples with ...

    • Morphological, viscoelastic and mechanical characterization of polypropylene/exfoliated graphite nanocomposites 

      Ferreira, Creusa Iara; Bianchi, Otávio; Soto Oviedo, Mauro Alfredo; Oliveira, Ricardo Vinicius Bof de; Mauler, Raquel Santos (2013) [Artigo de periódico]
      The viscoelastic, mechanical and morphological properties of polypropylene/exfoliated graphite nanocomposites with different contents of nanofiller were investigated. According to transmission electron microscopy results, ...

    • Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid 

      Niggas, Anna; Creutzburg, Sascha; Schwestka, Janine; Wöckinger, Benjamin; Gupta, Tushar; Grande, Pedro Luis; Eder, Dominik; Marques, José Pires; Bayer, Bernhard C.; Aumayr, Friedrich; Bennett, R.; Wilhelm, Richard Arthur (2021) [Artigo de periódico]
      Over seventy years ago, Niels Bohr described how the charge state of an atomic ion moving through a solid changes dynamically as a result of electron capture and loss processes, eventually resulting in an equilibrium charge ...