Application of fractography to the study of carbon diffusion in molybdenum

Yutaka Hiraoka, Hiroaki Iwasawa, Takeshi Inoue, Masahiro Nagae, Jun Takada

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Commercial pure molybdenum was immersed in a graphite-filled container and heated in vacuum at temperatures between 1073 and 1573K for 1.2ks. The fracture surface of the carbon-added specimen was examined using a scanning electron microscope (SEM). From the change of fracture mode as a function of distance from the specimen surface, the carbon diffusion distance was estimated. From Arrhenius plots of the carbon diffusion distance and the diffusion temperature we derived a diffusion parameter, like the activation energy for carbon diffusion in molybdenum of 182kJ. This value well agrees with the data that had been previously obtained using chemical composition analysis and/or activation analysis.

Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalJournal of Alloys and Compounds
Volume377
Issue number1-2
DOIs
Publication statusPublished - Sep 8 2004

Keywords

  • Metals
  • Powder metallurgy
  • Scanning electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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