A new treatment of scanning electron microscopy data is presented and has been applied to study the temperature dependence of diamond nucleation on sintered tungsten. The data analysis is performed in the framework of a nucleation and grain growth model that is able to describe both the nucleation kinetics and the evolution in time of the substrate surface coverage by diamond. The nucleation model provides the determination of a new quantity, the ''overall'' nucleation density, which represents the number of surface nuclei that would be obtained if the nucleus growth rate was nil. Comparison between the calculated ''overall'' nucleation density and the measured surface density of diamond crystallites shows that the total number per unit area of nuclei counted by microscopic techniques might not be a representative parameter of the nucleation process.

Polini, R., Tomellini, M. (1993). Determination of the "overall" nucleation density on tungsten: a new treatment of the data. DIAMOND AND RELATED MATERIALS, 2, 952-957 [10.1016/0925-9635(93)90257-3].

Determination of the "overall" nucleation density on tungsten: a new treatment of the data

POLINI, RICCARDO;TOMELLINI, MASSIMO
1993-01-01

Abstract

A new treatment of scanning electron microscopy data is presented and has been applied to study the temperature dependence of diamond nucleation on sintered tungsten. The data analysis is performed in the framework of a nucleation and grain growth model that is able to describe both the nucleation kinetics and the evolution in time of the substrate surface coverage by diamond. The nucleation model provides the determination of a new quantity, the ''overall'' nucleation density, which represents the number of surface nuclei that would be obtained if the nucleus growth rate was nil. Comparison between the calculated ''overall'' nucleation density and the measured surface density of diamond crystallites shows that the total number per unit area of nuclei counted by microscopic techniques might not be a representative parameter of the nucleation process.
1993
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore CHIM/03 - CHIMICA GENERALE E INORGANICA
Settore FIS/03 - FISICA DELLA MATERIA
English
Con Impact Factor ISI
Diamond; Tungsten; Thin Films; Nucleation kinetics; Growth; Chemical Vapor Deposition (CVD)
Polini, R., Tomellini, M. (1993). Determination of the "overall" nucleation density on tungsten: a new treatment of the data. DIAMOND AND RELATED MATERIALS, 2, 952-957 [10.1016/0925-9635(93)90257-3].
Polini, R; Tomellini, M
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/44578
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact