MAGNETO RHEOLOGICAL FLUID HAVING HIGH YIELD STRESS AT HIGH SHEAR RATE

摘要

A magneto rheological fluid having high yield stress at high shear rate using carbonyl iron powder is provided to improve stability and reliability about damper, clutch, brake, and engine mount by expanding control range. A magneto rheological fluid having high yield stress at high shear rate is made of magnetic particle, and satisfies the following conditions: 1um=2. The d10 is granularity of size corresponding to 10% about maximum granularity in granularity accumulation distribution. The d50 is granularity corresponding to 50% about maximum granularity in granularity accumulation distribution. The d90 is granularity corresponding to 90% about maximum granularity in granularity accumulation distribution. The magnetic particle is simple kind of carbonyl iron powder.