Improvement of Friction Durability of Magnetic Head-Disk Interfaces by Thin Lubricant Films on Diamond-like-carbon Protective Layers | Chapter 4 | Current Topics and Emerging Issues in Materials Sciences Vol. 1

 Nanowear and viscoelasticity were judged to study the nanotribological properties of lubricant films of Z-tetraol, D-4OH, and A20H on gemstone-like-carbon guarding layers, including their memory and replenishment properties. For A20H and dense Z-tetraol-coated disks, the plate surface partially protrudes, and the point lag (tan δ ) increases accompanying friction. Good replenishment authorizes the lubricant to reflow and cover areas exhausted after flowing contact between the head and disk. The memory and replenishment of lubricants depend on their interplays with the gemstone-like carbon (DLC) film on the surface of the disc. This result is consistent with renewal of the lubricant upon tip falling. For the D-4OH-coated disk, the tan δ advantage decreases with tip sliding, identical to the case for the unlubricated disk. The grit of the lubricant-coated drawing disks was then determined using friction tests accompanying increasing and decreasing loads. Regardless of the load, the unlubricated plate's friction force fast increases after about 30 reciprocating eras. By plotting the friction cooperative's relationship accompanying the load and reciprocating cycle number, the lubricating state can be calculated. There are four types in which the disagreement coefficient can be established. In addition, the changes in the friction coefficient were plan with respect to the lubricating state, emphasizing four distinct extents of lubricant management. The lowest friction area forms fluid lubrication. The second area forms the transition to assorted lubrication. The third district constitutes boundary lubricating. The highest resistance of the fourth area results from surface rupture. The boundary lubricating area of the A20H lubricator was wide, by way of its good retention and renewal properties.

Author(s) Details:

Shojiro Miyake,
MS laboratory, 3-1, Gonokami, Hamura-city, Tokyo 205-0011, Japan.

Shota Suzuki,
Sanshinseiki, 3-15-18 Yaguchi, Ota Ward, Tokyo 146-0093, Japan.

Masatoshi Miyake,
MS laboratory, 3-1, Gonokami, Hamura-city, Tokyo 205-0011, Japan.

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