乳液基碳化硅纳米工作液的沉降稳定性、流变性与介电性

doi:10.11896/cldb.20010106

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Abstract At present, powder mixed electrical discharge machining (PMEDM) is mainly limited in the addition of powder particles size of micron in the working fluid cannot constitute a uniform and stable suspension. Emulsion based SiC nano working fluid is prepared by two-step method by emulsion as base fluid, nano SiC powder as dispersed phase, and SDBS, CMC,etc as dispersants. The dispersion behavior of SiC nanometer powder in the emulsion with different dispersion conditions is studied, which sedimentation stability, rheology and dielectric properties are analyzed. The results show that within the range of the CMC mass fraction of 0.3%—0.6%, the emulsion has a significant effect on the wetting and dispersion stability of SiC nanoparticles, while SDBS has no obvious effect. Under the synergistic effect of CMC and SDBS or SDS, the nano working fluid has good settlement stability. When SDBS mass fraction is 0.3% and CMC is 0.3%—0.6%, the viscosity of working fluid increases nonlinearly. When the CMC mass fraction is 0.3% and SDBS is at 0.3%—1.4%, the viscosity of the nano working fluid increase firstly and then decrease rapidly. The conductivity of the working fluid increases with the increase of the mass fraction of the dispersant and the temperature of the liquid. Therefore, when SiC mass fraction is 0.3%, CMC is at 0.3%—0.5%, and SDBS is at 0.3%—0.7%, the emulsion based SiC nano-working fluid have good sedimentation stability, rheological property and dielectric property.

Key words： emulsion SiC nano powder sedimentation stability dielectric properties rheological properties wire electrical discharge machining

Published: 10 May 2021

CLC number:

TB34

Fund:National Natural Science Foundation of China (51165012), Undergraduate Innovation and Entrepreneurship Training Program of Sichuan University of Sicence & Engineering (S202010622097).

About author:: Cuixia Guo is an associate professor and master tutor of Sichuan University of Science & Engineering. She is studying for her doctorate at Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology in 2018. Her research interests focus on the fundamental theory & application about the surface modification of WEDM based on nanomaterials. She has published more than 20 journal papers as the first author, applied 8 national invention patents and 4 of them were authorized.
Zhangyong Wu, director of the Institute of Functional Fluid Applications and Mine Electromechanical Engineering, College of Mechanical and Electrical Enginee-ring, Kunming University of Science and Technology. Born in May 1963, master of mechanical manufacturing and automation and he became a senior engineer in 1996, named professor in 2004. The main research directions are water-based hydraulic transmission techno-logy, electro-hydraulic digital control technology, new hydraulic media, components and systems. In recent years, he has hosted and participated in more than 20 scientific research projects, published more than 50 papers, participated in the compilation of 1 textbook and 1 monograph, won 1 first prize and 2 third prize of Yunnan Science and Technology Progress Award, and obtained invention patent 13, more than 60 patents for utility and utility models.

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	GUO Cuixia
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Cite this article:

GUO Cuixia,WU Zhangyong,WANG Hang, et al. Sedimentation Stability, Rheological Properties and Dielectric Properties of Emulsion-based Silicon Carbide Nanometer Working Fluid[J]. Materials Reports, 2021, 35(8): 8028-8033.

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http://www.mater-rep.com/EN/10.11896/cldb.20010106 OR http://www.mater-rep.com/EN/Y2021/V35/I8/8028

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