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<p>Magnetorheological shear thickening polishing media (MRSTPM) have numerous applications in the fields of geological, petroleum, and biomedical engineering owing to the excellent rheological properties. However, the rheological properties of MRSTPM with various particles have not been clearly investigated under multi-field excitation. In the present study, the MRSTPM thickening system, comprising a polyhydroxy polymer/deionized water mixture, abrasive particles, and carbonyl iron powders, was developed to investigate the rheological characteristics. The intrinsic model of MRSTPM was established based on the non-Newtonian shear stress model and the Bingham model. The effects of various dispersed phase concentrations, magnetic particle sizes, and magnetic flux densities on the steady-state shear rheological properties of MRSTPM were investigated experimentally. The relationships among the shear rate, the viscosity, and the shear stress were explored to understand the behaviors of the MRSTPM under various shear rates. The microscopic morphology of MRSTPM was examined using an ultra-depth-of-field microscope under magnetic and non-magnetic field actions. The best rheological performance was demonstrated by the MRSTPM with 40% dispersed phase concentration and 100&#xa0;μm magnetic particle. As the magnetic flux density increases, the shear thickening effect of MRSTPM is weakened, but the magnetorheological behavior is enhanced. In addition, polishing experimental investigations on the industrial zirconium 702 tubes were conducted based on the developed MRSTPM. The effects of the working gap, magnetic particle size, and dispersed phase concentration on the surface roughness were discussed in detail. The surface roughness decreased from 1.1&#xa0;μm to 97&#xa0;nm under experimental conditions with the 40% dispersed phase concentration, 100&#xa0;μm magnetic particle, and 1&#xa0;mm working gap.</p>

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Rheological properties of magnetorheological shear thickening polishing media with multi-field excitation for zirconium 702 tube polishing

  • 期刊论文

  • 发表日期：

    2025年11月18日

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  • Zenghua Fan,
  • Xiang Zhang,
  • Jiyong Li,
  • Zihao Yang,
  • Jun Gao,
  • Yebing Tian

摘要

Magnetorheological shear thickening polishing media (MRSTPM) have numerous applications in the fields of geological, petroleum, and biomedical engineering owing to the excellent rheological properties. However, the rheological properties of MRSTPM with various particles have not been clearly investigated under multi-field excitation. In the present study, the MRSTPM thickening system, comprising a polyhydroxy polymer/deionized water mixture, abrasive particles, and carbonyl iron powders, was developed to investigate the rheological characteristics. The intrinsic model of MRSTPM was established based on the non-Newtonian shear stress model and the Bingham model. The effects of various dispersed phase concentrations, magnetic particle sizes, and magnetic flux densities on the steady-state shear rheological properties of MRSTPM were investigated experimentally. The relationships among the shear rate, the viscosity, and the shear stress were explored to understand the behaviors of the MRSTPM under various shear rates. The microscopic morphology of MRSTPM was examined using an ultra-depth-of-field microscope under magnetic and non-magnetic field actions. The best rheological performance was demonstrated by the MRSTPM with 40% dispersed phase concentration and 100 μm magnetic particle. As the magnetic flux density increases, the shear thickening effect of MRSTPM is weakened, but the magnetorheological behavior is enhanced. In addition, polishing experimental investigations on the industrial zirconium 702 tubes were conducted based on the developed MRSTPM. The effects of the working gap, magnetic particle size, and dispersed phase concentration on the surface roughness were discussed in detail. The surface roughness decreased from 1.1 μm to 97 nm under experimental conditions with the 40% dispersed phase concentration, 100 μm magnetic particle, and 1 mm working gap.