磁流体是大量的强磁微粒稳定地分布在水或油等介质中的一种固液混合物,磁流体的典型用途是密封,最近开拓用于超声波探伤。超声波探伤时,往往在探头、试料表面涂抹水、油、冷却剂等液体,以防止试料表面反射超声波;而用磁流体附着在探头 Magnetic fluid is a large number of strong magnetic particles stably distributed in water or oil and other media in a solid-liquid mixture, the typical use of magnetic fluid seal, recently opened up for ultrasonic flaw detection. Ultrasonic flaw detection, often in the probe, the sample surface smear water, oil, coolant and other liquids to prevent the sample surface reflection of ultrasound; and magnetic fluid attached to the probe