Unraveling grain growth of metallic tungsten
Carregando...
Data
Data de publicação
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Powder Technology
Exportar
Resumo
This paper focuses on the experimental observation of tungsten grain evolution during the process of hydrogen
reduction of tungsten trioxide. The objective is to gain insights into the grain size distribution (GSD)
evolution and morphology changes of metallic tungsten. The study employs an amalgamation of conventional
characterization techniques – such as TGA, SEM-EDS, TEM and XRD – alongside cutting-edge techniques like phase contrast nano-tomography from synchrotron sources. Conducted as a quasi in-situ study, this
research offers the opportunity to observe the transient evolution of the formed metallic tungsten phase
within its precursor WO2 particles. The paper presents and discusses quantitative results concerning the
evolution of GSD and morphological changes, encompassing growth rates of both crystallites and grains of
the synthesized metallic phase. Additionally, the quasi in-situ study highlights the dependence of grain size
on water concentration during the reduction process. The qualitative and quantitative findings contribute to
a more nuanced understanding of the kinetics of grain growth of metallic tungsten and offer insights into
the intricate interplay between reduction parameters, GSD evolution and morphological changes. Gaining a
deeper understanding of the underlying mechanisms driving the changes in GSD establishes a foundation for
predictive theory with immediate academic and industrial impact.
Como referenciar
ESTUPINAN-DONOSO, ALVARO A.; GRAVIER, PAULINE; ICHIKAWA, RODRIGO U.; MICHELS, ANDREAS. Unraveling grain growth of metallic tungsten: investigating the nanoscale realm of hydrogen reduction of tungsten oxides. Powder Technology, v. 438, p. 1-11, 2024. DOI: 10.1016/j.powtec.2024.119672. Disponível em: https://repositorio.ipen.br/handle/123456789/48088. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.