Accession Number:

ADA270878

Title:

Tribological Studies of Silicon for Magnetic Recording Applications (Invited)

Descriptive Note:

Corporate Author:

OHIO STATE UNIV COLUMBUS COMPUTER MICROTRIBOLOGY AND CONTAMINATION LAB

Personal Author(s):

Report Date:

1993-10-05

Pagination or Media Count:

25.0

Abstract:

Read-write sliders made of silicon using integrated-circuit technology offer advantages of low-cost and high volume production. In the present study our objective is to investigate whether the friction and wear performance of bare silicon is adequate for disk drive application or whether certain coatingstreatments are necessary for low friction and wear. Macrotribological experiments have been performed with various pinslider materials and magnetic disks in a modified disk drive. Microtribological studies have also been conducted on silicon using a friction force microscope. Based on macrotests, we found that the friction and wear performance of bare silicon is not adequate. With single and polycrystalline silicon, transfer of amorphous carbon from the disk to the pinslider and oxidation-enhanced fracture of pin slider material followed by oxidation of the transfer coating is responsible for degradation of the sliding interface and consequent friction increase in ambient air. With dry-oxidized or PECVD-SiO2-coated silicon, no significant friction increase or interfacial degradation was observed in ambient air. In the absence of an oxidizing environment in dry nitrogen, the coefficient of friction decreased from 0.2 to 0.05 following amorphous carbon transfer for the materials tested. Nanoscratchingnanowear and nanoindentation studies also indicate that coated silicon is superior to bare silicon.

Subject Categories:

  • Electrical and Electronic Equipment
  • Coatings, Colorants and Finishes
  • Recording and Playback Devices
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE