Assessment of magnetic fluid stability in non-homogeneous magnetic field of a single-tooth magnetic fluid sealer

• Published in: Journal of magnetism and magnetic materials 2017-06, Vol.431, p.20-23
• Main Authors: Arefyev, I.M., Demidenko, O.V., Saikin, M.S.
• Format: Article
• Language: English
• Subjects: Fluid dynamics; Magnetic field; Magnetic fields; Magnetic fluid; Sealer; Seals; Service life; Stability; Stability analysis; Stability criteria; Studies; Teeth; Test
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2016.10.017

A special experimental stand has been developed and made to test magnetic fluid. It represents a single-tooth magnetic fluid sealer. The type of dependence of the pressure differential on magnetic fluid sealer operation time is used as a criterion to determine magnetic fluid stability and magnetic fluid sealer service life under such conditions. The siloxane-based magnetic fluid was used as the test sample. The colloidal stability as well as stability of the synthesized magnetic fluid in magnetic fields in static mode were determined. It has been found that the obtained magnetic fluid is stable in static mode and, consequently, can be used to conduct necessary tests on stand. Short-term and life tests on stand have shown that MF remains stable and efficient for at least 360 days of continuous utilization. •An experimental single-tooth magnetic fluid sealer has been developed and made.•The magnetic fluid based on siloxane liquid was used as the test sample.•Short-term and life tests of the magnetic fluid were conducted.•The magnetic fluid stability was determined by necessary tests on stand.