Simulation of composite particle growth in the dispersion and compounding processes of alloy particles and ceramic powder

Tomohiro Iwasaki, Takeshi Yanagida, Munetake Satoh

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The authors investigated a compounding process in which fine WC powder is uniformly dispersed into particulate Ag-Ni alloy with a high-speed elliptical-rotor-type powder mixer. The growth of composite particles is observed as processing time elapses. A model for the growth phenomenon is constructed on the basis of the theory of powder grinding with a ball mill, and of the dynamics of the plastic deformation of metal particles. In the model, a function of the probability that composite particles grow is expressed in terms of three factors that include the compounding conditions as parameters: (1) the probability that particles are caught between a pair of medium balls (zirconia beads), (2) that they have undergone plastic deformation, and (3) the frequency with which the mixture of composite particles and beads is compressed by the elliptical rotor at the minimum clearance per unit time. Temporal change in the size distribution of composite particles has been calculated by using model equations. Comparison of calculated values with the experimental data for particle median diameter shows that they agree closely. It was demonstrated that the model is valid and that it is possible to accurately estimate and control particle size.

Original languageEnglish
Pages (from-to)213-219
Number of pages7
JournalKONA Powder and Particle Journal
Volume17
Issue numberMay
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

Fingerprint

Powders
Composite materials
Plastic deformation
Rotors
Grinding (comminution)
Ball mills
Zirconia
Metals
Particle size
Processing

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Engineering(all)

Cite this

Simulation of composite particle growth in the dispersion and compounding processes of alloy particles and ceramic powder. / Iwasaki, Tomohiro; Yanagida, Takeshi; Satoh, Munetake.

In: KONA Powder and Particle Journal, Vol. 17, No. May, 01.01.1999, p. 213-219.

Research output: Contribution to journalArticle

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