The interfacial adhesion between microstructures is inevitable in a micro-electro-mechanical system (e.g., hard disk drive (HDD)), which may lead to complicated microtribodynamics problems. This research has investigated the effect of surface potential on the interfacial adhesion and microtribodynamics of the head–disk interface (HDI) in an HDD. A dynamic continuum surface force model, where the electrowetting is considered, is proposed to evaluate the interfacial interaction, and then employed into a two-degree-of-freedom (2DOF) model to theoretically analyze the potential influence mechanism on the microtribodynamics. The results confirm that the elimination of potential can effectively repress the adhesion retention, which is further proved by the measured slider response with a laser Doppler vibrometer (LDV). Moreover, the effect of the potential on the adhesion-induced instability is also analyzed through the phase portrait. It tells that the critical stable flying height can be lowered with the elimination of potential.

在微机电系统（例如硬盘驱动器（HDD））中，微结构之间的界面粘附是不可避免的，这可能会导致复杂的微摩擦动力学问题。本研究研究了表面电位对 HDD 中头盘界面 (HDI) 的界面粘附力和微摩擦动力学的影响。提出了考虑电润湿的动态连续表面力模型来评估界面相互作用，然后将其应用于二自由度（2DOF）模型中，从理论上分析了对微观摩擦动力学的潜在影响机制。结果证实，消除电势可以有效抑制粘附保留，激光多普勒振动计（LDV）测量的滑块响应进一步证明了这一点。此外，还通过相图分析了电位对粘附引起的不稳定性的影响。这说明临界稳定飞行高度可以随着电位的消除而降低。