Computational study on the microstructural evolution and the change of electrical resistivity of sintered materials

Hee Soo Kim, jin woo Park

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The change of electrical resistivity of materials during sintering has been investigated. The evolution of two-dimensional microstructures during sintering was evaluated using Monte Carlo simulation featuring neck formation, grain growth, and contraction of the powder compacts. The overall electrical resistivity of the sintered microstructure, calculated by Kirchhoff's first law, was related to the microstructure development during sintering, depending on microstructural parameters such as size and distribution of grains and pores. The solid-state sintering process of monosized particles was divided into three regimes: neck formation, densification, and grain growth. The resistivity dropped significantly at the very initial stage due to neck formation, and decreased slowly as pores were annihilated, while it remained almost unchanged after complete pore removal. For the sintering of randomly packed random-sized particles, the electrical resistivity dropped at the initial stage due to the neck formation, and then continuously decreased by a combined effect of compact densification and grain growth.

Original languageEnglish
Pages (from-to)475-481
Number of pages7
JournalJournal of Electronic Materials
Volume38
Issue number3
DOIs
Publication statusPublished - 2009 Mar 1

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Microstructural evolution
sintering
Sintering
electrical resistivity
Grain growth
densification
porosity
Densification
microstructure
Microstructure
grain formation
Powders
contraction
solid state
simulation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

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abstract = "The change of electrical resistivity of materials during sintering has been investigated. The evolution of two-dimensional microstructures during sintering was evaluated using Monte Carlo simulation featuring neck formation, grain growth, and contraction of the powder compacts. The overall electrical resistivity of the sintered microstructure, calculated by Kirchhoff's first law, was related to the microstructure development during sintering, depending on microstructural parameters such as size and distribution of grains and pores. The solid-state sintering process of monosized particles was divided into three regimes: neck formation, densification, and grain growth. The resistivity dropped significantly at the very initial stage due to neck formation, and decreased slowly as pores were annihilated, while it remained almost unchanged after complete pore removal. For the sintering of randomly packed random-sized particles, the electrical resistivity dropped at the initial stage due to the neck formation, and then continuously decreased by a combined effect of compact densification and grain growth.",
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Computational study on the microstructural evolution and the change of electrical resistivity of sintered materials. / Kim, Hee Soo; Park, jin woo.

In: Journal of Electronic Materials, Vol. 38, No. 3, 01.03.2009, p. 475-481.

Research output: Contribution to journalArticle

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