Nanoscale dynamics at reactive wetting front on SiC

Shun Ichiro Tanaka, Chihiro Iwamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Nanoscale singularity at the reactive wetting front on SiC (0006) was studied using video recorded in situ to clarify the dynamic atomistic behaviours of the brazing and the molten tip spreading on a high-temperature stage of a high-resolution transmission electron microscope. An atomistic process controls the wetting at the front of the spreading film where the classical macroscopic phenomenon never holds true and the singularities are observed in a precursor film. A 0.5-nm-thick precursor film spreading ahead of the main molten alloy on SiC (0006) at 1073 K and continuous spreading of the molten alloy were clearly observed on the SiC (0006) surface with a less than 1-nm-thick amorphous layer. Molten Ti and TiC nanolayers preceded the Ti5Si3 nanolayer at the tip and they traveled continuously at a velocity of 14 nm/sec on the plane perpendicular to SiC (0006). Since Ti atoms in the molten alloy diffuse sufficiently rapidly on the SiC surface to the tip, the formation of these layers may be the rate-determining step of spreading. Discontinuous spreading of the precursor tip on SiC (0006) with a thick amorphous film was observed in contrast to the continuous spreading on SiC with a thin film. This suggests that the spreading of the Ti molten alloy on SiC is also controlled by the dissolution of the amorphous layer.

Original languageEnglish
Title of host publicationNew Frontiers of Processing and Eng. in Advanced Materials - Proc. of the Int. Conf. on New Frontiers of Process Science and Eng. in Advanced Materials, PSEA' 04 - The 14th Iketani Conference
PublisherTrans Tech Publications Ltd
Pages269-274
Number of pages6
ISBN (Print)0878499806, 9780878499809
DOIs
Publication statusPublished - 2005 Jan 1
EventInternational Conference on New Frontiers of Process Science and Engineering in Advanced Materials, PSEA' 04 - Kyoto, Japan
Duration: 2004 Nov 242004 Nov 26

Publication series

NameMaterials Science Forum
Volume502
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherInternational Conference on New Frontiers of Process Science and Engineering in Advanced Materials, PSEA' 04
CountryJapan
CityKyoto
Period04/11/2404/11/26

Keywords

  • Atomistic dynamic wetting
  • In situ observation
  • Precursor tip
  • Reactive wetting

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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