Formation of TiB particles during reaction sintering in a TiB/Ti composite

Tatsuaki Yoshihiro, Toshihiro Tsuchiyama, Setsuo Takaki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Chemical reaction process (Ti+CrB→Cr+TiB) of isolated CrB particle in a Ti powder compact was investigated to find a proper sintering condition for producing TiB/Ti composites by reaction sintering. EPMA analysis revealed that the formation of TiB starts at 1223 K during heated with the rate of 0.17 K/s. The reaction proceeds topochemically with the movement of a reaction band from the particle surface to inside. The unreacted-core model was applied to the reaction of a CrB particle for the analyse the reaction rate of CrB particle. It was found that diffusion of Ti and Cr atoms in a TiB layer controls the whole reaction rate, and then the time of reaction finish at 1223 K was estimated as a function of initial CrB particle radius.

Original languageEnglish
Pages (from-to)362-367
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume67
Issue number7
DOIs
Publication statusPublished - Jul 2003

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Reaction rates
sintering
Sintering
composite materials
Composite materials
Electron probe microanalysis
Powders
Chemical reactions
reaction kinetics
Atoms
chemical reactions
radii
atoms

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Formation of TiB particles during reaction sintering in a TiB/Ti composite. / Yoshihiro, Tatsuaki; Tsuchiyama, Toshihiro; Takaki, Setsuo.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 67, No. 7, 07.2003, p. 362-367.

Research output: Contribution to journalArticle

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abstract = "Chemical reaction process (Ti+CrB→Cr+TiB) of isolated CrB particle in a Ti powder compact was investigated to find a proper sintering condition for producing TiB/Ti composites by reaction sintering. EPMA analysis revealed that the formation of TiB starts at 1223 K during heated with the rate of 0.17 K/s. The reaction proceeds topochemically with the movement of a reaction band from the particle surface to inside. The unreacted-core model was applied to the reaction of a CrB particle for the analyse the reaction rate of CrB particle. It was found that diffusion of Ti and Cr atoms in a TiB layer controls the whole reaction rate, and then the time of reaction finish at 1223 K was estimated as a function of initial CrB particle radius.",
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