Replenishment Speed of Depleted Scar in Submonolayer Lubricant

被引：7
作者：
Ono, Kyosuke [1 ]
机构：
[1] Tokyo Inst Technol, Meguro Ku, Tokyo 1528550, Japan
来源：
TRIBOLOGY LETTERS | 2013年 / 52卷 / 02期
关键词：
Nanotribology; Head-disk interface; Submonolayer lubricant film; Replenishment speed; Lubricant Mobility; Effective viscosity; Experiment and simulation; SPREADING PROFILES; FILMS; CONTACT;
D O I：
10.1007/s11249-013-0205-z
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The evaluation of submonolayer lubricant mobility is becoming important in the field of nanotribology, in particular, in hard disk drives for realizing the near-contact or surfing-recording. This paper experimentally and theoretically investigates the replenishment speed of a depleted scar in a submonolayer lubricant caused by the head-disk contact. The theoretical analysis is based on continuum mechanics. The replenishment process of a submonolayer lubricant height profiles in a depleted scar caused by the head touchdown operation was experimentally measured for the Z-tetraol lubricant with a 0.24 nm mobile lubricant thickness and compared with the numerical simulation. It was found that the analytical replenishment process can fairly agree with the experimental one if the ratio of Hamaker constant to effective lubricant viscosity is properly determined. By using the validated basic equation, a simple but useful generalized formula is proposed to evaluate the replenishment speed in relation to the depleted scar width of the mobile lubricant, the lubricant thickness, and the ratio of Hamaker constant to effective lubricant viscosity.
引用
收藏
页码：195 / 203
页数：9
相关论文
共 21 条
[1]   Critical clearance and lubricant instability at the head-disk interface of a disk drive [J].
Ambekar, Rohit P. ;
Bogy, David B. ;
Dai, Qing ;
Marchon, Bruno .
APPLIED PHYSICS LETTERS, 2008, 92 (03)
[2]   Slider-Lubricant Interactions and Lubricant Distribution for Contact and Near Contact Recording Conditions [J].
Canchi, Sripathi Vangipuram ;
Bogy, David B. .
IEEE TRANSACTIONS ON MAGNETICS, 2011, 47 (07) :1842-1848
[3]   Linearized analysis of the deformation of ultra-thin lubricant films under gas pressures by the long wave equation [J].
Fukui, Shigehisa ;
Shimizu, Soichi ;
Yamane, Kiyomi ;
Matsuoka, Hiroshige .
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS, 2007, 13 (8-10) :1339-1345
[4]   A spreading study of lubricant films via optical surface analyzer and molecular dynamics [J].
Guo, Qian ;
Li, Lei ;
Hsia, Yiao-Tee ;
Jhon, Myung S. .
IEEE TRANSACTIONS ON MAGNETICS, 2006, 42 (10) :2528-2530
[5]   Fiber wobbling method for dynamic viscoelastic measurement of liquid lubricant confined in molecularly narrow gaps [J].
Itoh, Shintaro ;
Fukuzawa, Kenji ;
Hamamoto, Yuya ;
Zhang, Hedong ;
Mitsuya, Yasunaga .
TRIBOLOGY LETTERS, 2008, 30 (03) :177-189
[6]   Spreading Properties of Monolayer Lubricant Films: Effect of Bonded Molecules [J].
Itoh, Shintaro ;
Takahashi, Kenichiro ;
Fukuzawa, Kenji ;
Amakawa, Hiroaki ;
Zhang, Hedong .
IEEE TRANSACTIONS ON MAGNETICS, 2009, 45 (11) :5055-5060
[7]   Magnetic Head Protrusion Profiles and Wear Pattern of Thermal Flying-Height Control Sliders With Different Heater Designs [J].
Juang, Jia-Yang ;
Forrest, Joel ;
Huang, Fu-Ying .
IEEE TRANSACTIONS ON MAGNETICS, 2011, 47 (10) :3437-3440
[8]   Calculation of spreading profiles for molecularly-thin films from surface energy gradients [J].
Karis, TE ;
Tyndall, GW .
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, 1999, 82 (2-3) :287-302
[9]   Characteristics of dual lubricant layers [J].
Katano, T ;
Oka, M ;
Nakazawa, S ;
Aramaki, T ;
Kusakawa, K .
IEEE TRANSACTIONS ON MAGNETICS, 2003, 39 (05) :2489-2491
[10]   Towards fly- and lubricant-contact recording [J].
Liu, B. ;
Zhang, M. S. ;
Yu, S. K. ;
Hua, W. ;
Wong, C. H. ;
Zhou, W. D. ;
Man, Y. J. ;
Gonzaga, Leonard ;
Ma, Y. S. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2008, 320 (22) :3183-3188
123