Abstract

The majority of data generated today is stored in magnetic storage hard disk drives (HDD) of enterprise-level data centers. The HDD industry is striving for higher areal density capacity to meet increasing demand for data storage. Heat-assisted magnetic recording (HAMR) has been proposed as the next-generation technology that will bring revolutionary areal density gains. However, the technology comes with elevated temperature conditions and inevitably brings corresponding challenges to the head–disk interface (HDI). HDI high temperature tribology is the primary failure mode of HDDs and is discussed in the present work. Temperature dependence of mechanical properties, friction, wear and adhesion are reported based on experimental results from nanoindentation, nanoscratch, nanowear and adhesion experiments. The data reveals quantitative variations of Young’s modulus, hardness, coefficient of friction, and surface energy with temperature. In addition, XPS analysis is performed to measure chemical surface changes, and correlated with the nanomechanical findings.

Graphical Abstract

中文翻译：

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热辅助磁记录的高温力学，摩擦，磨损和粘附

摘要

今天生成的大多数数据都存储在企业级数据中心的磁存储硬盘驱动器（HDD）中。HDD行业正在努力提高表面密度，以满足日益增长的数据存储需求。热辅助磁记录（HAMR）已被提出作为下一代技术，它将带来革命性的面密度增加。但是，该技术伴随着高温条件而不可避免地给磁头-磁盘接口（HDI）带来了相应的挑战。HDI高温摩擦学是HDD的主要故障模式，在本工作中将进行讨论。根据纳米压痕，纳米划痕，纳米磨损和附着力实验的实验结果，报告了机械性能，摩擦，磨损和附着力的温度依赖性。数据揭示了杨氏模量，硬度，摩擦系数和表面能随温度的定量变化。另外，进行XPS分析以测量化学表面变化，并与纳米力学发现相关。

图形概要