NDLI: Frictional Heating Effect on Thermal Protrusion in Head Disk Interface

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Frictional Heating Effect on Thermal Protrusion in Head Disk Interface

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Li, Jianhua Xu, Junguo Furukawa, Masaru
Copyright Year	2013
Abstract	For increasing areal density in hard disk drives (HDDs), the physical clearance between the read/write element and the surface of the disk has been continuously decreasing to 1 nm or below [1]. At such a low clearance, the contact between the head and the disk is inevitable to occur, so head wear is becoming a critical issue in the development of HDD. The contact between the head and the disk induces a frictional heating, which may generate an additional thermal protrusion in the contact area of the head, and causes more wear. On the other hand, the target clearance in a HDD is generally determined by pulling back a setting TFC power from the touchdown point, accurately identifying the touchdown point is very significant for the clearance control in hard disk drive. A thermal protrusion is caused by friction-heating in the status of touchdown. Therefore, it is very necessary to quantitatively understand on friction induced thermal protrusion and clearance loss.
Sponsorship	Information Storage and Processing Systems Division
File Format	PDF
ISBN	9780791855539
DOI	10.1115/ISPS2013-2894
Conference Proceedings	ASME 2013 Conference on Information Storage and Processing Systems
Language	English
Publisher Date	2013-06-24
Publisher Place	Santa Clara, California, USA
Access Restriction	Subscribed
Subject Keyword	Friction Heating Wear Clearances (engineering) Disks Horizontal directional drilling Density
Content Type	Text
Resource Type	Article

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