Interfacial phenomena during melt processing of ceramic particle-reinforced metal matrix composites part I. Introduction (incorporation) of solid particles into melts

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Abstract

Incorporation of ceramic particles into liquid metals is the first necessary step of melt processing of Metal Matrix Composites (MMCs). Literature review of existing equations/models is given, and contradictions in the literature are discussed. Detailed thermodynamic analysis shows, that the equilibrium depth of immersion (x) of the spherical particle into the melt can be expressed as: xequilibrium = R(1 + cosΘ)) = RWalv where R is the radius of the particle, Θ and Wa are the equilibrium contact angle and adhesion energy between the melt and the particle, σlv is the surface tension of the melt. The following conclusions have been drawn from the above equation: i. Any particle with 0°2) such requirement can be met only, if some chemical interaction appears between the particle and the melt. The effect of gravity is also considered. It has been shown that gravity has any significant effect on incorporation of big particles only, with radius of at least 100 micrometer. Generally for particles used in MMCs gravity has a negligible effect, and conclusions given above remain valid.

Original languageEnglish
Pages (from-to)459-466
Number of pages8
JournalMaterials Science Forum
Volume215-216
Publication statusPublished - 1996

Fingerprint

metal matrix composites
Gravitation
Metals
ceramics
Composite materials
Processing
Liquid metals
Contact angle
Surface tension
Adhesion
gravitation
Thermodynamics
radii
liquid metals
submerging
micrometers
interfacial tension
adhesion
thermodynamics
requirements

Keywords

  • Ceramic Particles
  • Incorporation
  • Liquid Metals
  • Metal Matrix Composites
  • Wetting

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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abstract = "Incorporation of ceramic particles into liquid metals is the first necessary step of melt processing of Metal Matrix Composites (MMCs). Literature review of existing equations/models is given, and contradictions in the literature are discussed. Detailed thermodynamic analysis shows, that the equilibrium depth of immersion (x) of the spherical particle into the melt can be expressed as: xequilibrium = R(1 + cosΘ)) = RWa/σlv where R is the radius of the particle, Θ and Wa are the equilibrium contact angle and adhesion energy between the melt and the particle, σlv is the surface tension of the melt. The following conclusions have been drawn from the above equation: i. Any particle with 0°2) such requirement can be met only, if some chemical interaction appears between the particle and the melt. The effect of gravity is also considered. It has been shown that gravity has any significant effect on incorporation of big particles only, with radius of at least 100 micrometer. Generally for particles used in MMCs gravity has a negligible effect, and conclusions given above remain valid.",
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AU - Kaptay, G.

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N2 - Incorporation of ceramic particles into liquid metals is the first necessary step of melt processing of Metal Matrix Composites (MMCs). Literature review of existing equations/models is given, and contradictions in the literature are discussed. Detailed thermodynamic analysis shows, that the equilibrium depth of immersion (x) of the spherical particle into the melt can be expressed as: xequilibrium = R(1 + cosΘ)) = RWa/σlv where R is the radius of the particle, Θ and Wa are the equilibrium contact angle and adhesion energy between the melt and the particle, σlv is the surface tension of the melt. The following conclusions have been drawn from the above equation: i. Any particle with 0°2) such requirement can be met only, if some chemical interaction appears between the particle and the melt. The effect of gravity is also considered. It has been shown that gravity has any significant effect on incorporation of big particles only, with radius of at least 100 micrometer. Generally for particles used in MMCs gravity has a negligible effect, and conclusions given above remain valid.

AB - Incorporation of ceramic particles into liquid metals is the first necessary step of melt processing of Metal Matrix Composites (MMCs). Literature review of existing equations/models is given, and contradictions in the literature are discussed. Detailed thermodynamic analysis shows, that the equilibrium depth of immersion (x) of the spherical particle into the melt can be expressed as: xequilibrium = R(1 + cosΘ)) = RWa/σlv where R is the radius of the particle, Θ and Wa are the equilibrium contact angle and adhesion energy between the melt and the particle, σlv is the surface tension of the melt. The following conclusions have been drawn from the above equation: i. Any particle with 0°2) such requirement can be met only, if some chemical interaction appears between the particle and the melt. The effect of gravity is also considered. It has been shown that gravity has any significant effect on incorporation of big particles only, with radius of at least 100 micrometer. Generally for particles used in MMCs gravity has a negligible effect, and conclusions given above remain valid.

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