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| Abstract: |
| With the increase of hard disk storage density, the flying height of magnetic head sliders has become lower in recent years, which makes it easier for lubricant materials to transfer between the magnetic head and disk. The ability for lubricant materials to transfer is not only related to the operating conditions of disk but also related to the types of lubricant materials (Perfluoropolyether, PFPE) and diamond-like carbon (DLC) coating applied to the disk. Based on the principle of molecular dynamics, this study established the adsorption models on disks with different carbon content and the diffusion models of several common PFPE molecules in air. Besides, the adsorption energy and the diffusion coefficients of different models were calculated. Furthermore, the molecular weight, the molecular structure,the lubricant material's end functional groups, and the disk's carbon content were found to have influence on the transfer ability of lubricant materials.In particular, the latter two factors have further influence. |
| Key words: molecular dynamics adsorption energy diffusion coefficient |
| DOI：10.11916/j.issn.1005-9113.19103 |
| Clc Number:TP333.3 |
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| Descriptions in Chinese: |
| 润滑材料在磁头磁盘间转移特性的研究 曾秦阳，敖宏瑞*，姜洪源* （哈尔滨工业大学机电学院，哈尔滨 150001） 中文说明：近年来，随着硬盘存储密度的增加，磁头滑块的飞行高度逐渐降低，这使得润滑材料更容易在磁头与磁盘之间转移。润滑材料的转移能力不仅与硬盘的工作条件有关，还与润滑材料（全氟聚醚—PFPE）自身特性和磁盘的类金刚石（DLC）涂层有关。本文基于分子动力学原理，建立了几种常见的润滑材料分子与磁盘的吸附模型以及在空气中的扩散模型并进一步仿真计算了对应的吸附能和扩散系数。研究表明，润滑材料的分子量、分子结构和端基官能团以及磁盘的含碳量对润滑材料的转移能力均有影响，后两个因素对转移能力的影响较大。 关键字：分子动力学；吸附能；扩散系数 |
