Interfacial processes during infiltration of the quasicrystal-reinforced composites

Authors

  • V. F. Bashev Dr. Sc. (Physics&Math.), Prof., Ukraine
  • O. V. Sukhova Dr. Sc. (Tech.), Prof., Ukraine
  • Yu. V. Syrovatko

Keywords:

macroheterogeneous composite material, quasicrystal filler, furnace infiltration, dissolution, interfacial zone, average geometric vibration frequency, heat capacity

Abstract

Abstract. Purpose. The application of quasicrystals as fillers of composites allows reserving their unique physical-andmechanical properties and averting the limitations connected with their enhanced brittleness. The development of the composition and technology to fabricate composites demands experimental and theoretical investigation of the peculiarities in the structure and properties formation of the interfacial zones between the filler and binder. Methodology. Macroheterogeneous composites reinforced by Al–Co–Cu or Al–Co–Ni quasicrystal fillers were infiltrated at 1100 К during 30 minutes. Л62 brass was used as metallic binder. The structure of the composites was investigated by metallographic, X-ray, and energy dispersive X-ray analyses. To control structural and phase composition of interfacial zones appearing between the filler and binder during infiltration an original method of statistical structural analysis was applied. Findings. The structure and properties of interfacial zones between the filler and solidified binder were investigated. The two- and three-dimensional graphic models of the interfacial zones were suggested. The peculiarities in composites structure formation were explained by prevailing dissolution of filler crystal phases in the molten binder during infiltration. The dissolution rates of quasicrystal and crystal phases differed due to reduced average geometric atom vibration frequency of quasicrystals caused by their excess heat capacity. Originality. The compositions and furnace infiltration technology to produce brass-based composites reinforced by Al–Co–Cu or Al–Co–Ni quasicrystal fillers were suggested. The peculiarities in the structure formation of the interfacial zones between the filler and binder were investigated. The average geometric atom vibration frequency for quasicrystals were calculated. The dependency of this characteristic on the dissolution rate of filler solid phases in the molten binder was shown. The lower atom vibration frequency of quasicrystals was explained by their excess heat capacity. Practical value. The developed macroheterogeneous composites reinforced by Al–Co–Cu or Al–Co–Ni quasicrystal fillers can be recommended as coatings to protect surface of automobile transport parts working under dry friction or corrosive media.

Author Biographies

V. F. Bashev, Dr. Sc. (Physics&Math.), Prof.

Department of Experimental Physics and Physics of Metals, The Oles’ Gonchar Dnipropetrovsk National University, 72, Gagarin Ave., Dnipropetrovsk 49050, Ukraine

O. V. Sukhova, Dr. Sc. (Tech.), Prof.

Department of Experimental Physics and Physics of Metals, The Oles’ Gonchar Dnipropetrovsk National University, 72, Gagarin Ave., Dnipropetrovsk 49050, Ukraine

Yu. V. Syrovatko

Department of Experimental Physics and Physics of Metals, The Oles’ Gonchar Dnipropetrovsk National University, 72, Gagarin Ave., Dnipropetrovsk 49050, Ukraine

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Published

2017-03-27

Issue

Section

Proceedings in memory of Starodubov