Tribological characteristics of magnetorheological fluids based on carbonyl iron particles coated with various types of organosilanes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0197859" target="_blank" >RIV/00216305:26210/26:0197859 - isvavai.cz</a>

Alternative codes found

RIV/70883521:28110/25:63595898 RIV/70883521:28610/25:63595898

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2238785425010592" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2238785425010592</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2025.04.238" target="_blank" >10.1016/j.jmrt.2025.04.238</a>

Result language

angličtina

Original language name

Tribological characteristics of magnetorheological fluids based on carbonyl iron particles coated with various types of organosilanes

Original language description

Magnetorheological fluids (MRFs) belong to the category of smart materials capable of reversibly altering their rheological behaviour under the influence of an external magnetic field. One of the most critical issues encountered in real-world applications, such as semi-active damping systems, is the long-term operational stability caused primarily by the excessive wear of the contact surfaces of the system. This study investigates the tribological and rheological behavior of magnetorheological fluids (MRFs) containing carbonyl iron particles (CIPs) coated with various organosilanes. The MRFs were prepared using CIPs coated with (3-aminopropyl)triethoxysilane (APTES), tetraethoxysilane (TEOS), vinyltrimethoxysilane (VTMS), and hexamethyldisilane (HMDS). Tribological experiments, conducted using a ball-on-disc configuration, demonstrated that organosilane-coated CIPs significantly improve the tribological characteristics compared to bare CIPs. The specific wear rate decreased from 3.393 × 10−4 mm3 N−1 m−1 for bare CIPs to 1.248 × 10−4 mm3 N−1 m−1 for HMDS-coated CIPs. The friction coefficient was also reduced, with HMDS-coated CIPs showing the lowest value. Rheological experiments revealed a direct correlation between shear viscosity and magnetic field strength, with organosilane-coated CIPs exhibiting lower viscosity and improved sedimentation stability. Among the coatings, HMDS showed the most significant reduction in wear and friction, attributed to the formation of a protective tribo-layer.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Materials Research and Technology-JMR&T

ISSN

2238-7854

e-ISSN

2214-0697

Volume of the periodical

36

Issue of the periodical within the volume

6

Country of publishing house

BR - BRAZIL

Number of pages

15

Pages from-to

5962-5977

UT code for WoS article

001482152400001

EID of the result in the Scopus database

2-s2.0-105025419931