The wear mechanisms of Metal-Evaporated magnetic tape-head interfaces have been investigated. A new apparatus was designed for the continuous observation of the tape surface when run in the still frame mode. The mild wear mechanism of the bumps on the ME tapes was proven using SEM and AFM. Four different types of wear debris were observed. Depending on wear debris formation, two types of spalling were emphasized. The effect of humidity in the range of 30–70 percent was also investigated. The wear mechanisms are discussed in terms of contact mechanics theory, coating failure modes, and humidity induced stiction theory.

1.
Archard
J. F.
,
1957
, “
Elastic Deformation and the Laws of Friction
,”
Proc, Roy. Soc. Lond., Series A
, Vol.
243
, pp.
190
205
.
2.
Berthier
Y.
,
Godet
M.
, and
Brendle
M.
,
1989
, “
Velocity Accommodation in Friction
,”
Tribology Transactions
, Vol.
32
(
1
), pp.
490
496
.
3.
Bertram
Neal H.
,
1986
, “
Fundamentals of the Magnetic Recording Process
,”
Proc. IEEE
, Vol.
74
(
11
), pp.
1494
1512
.
4.
Bhushan
B.
,
1984
, “
Analysis of the Real Area of Contact Between a Polymeric Magnetic Medium and a Rigid Surface
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
106
, pp.
26
34
.
5.
Bhushan, B., 1990, Tribology and Mechanics of Magnetic Storage Devices, Springer-Verlag, New-York.
6.
Bhushan
B.
, and
Dugger
M. T.
,
1990
, “
Real Contact Area Measurements on Magnetic Rigid Disks
,”
Wear
, Vol.
137
, pp.
41
50
.
7.
Bull
S. J.
,
1991
, “
Failure Modes in Scratch Adhesion Testing
,”
Surface and Coatings Technology
, Vol.
50
, pp.
25
32
.
8.
Chang
W. R.
,
Etsion
I.
, and
Bogy
D. B.
,
1988
, “
Adhesion Model for Metallic Rough Surfaces
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
110
, pp.
50
56
.
9.
Chiba
K.
,
Sato
K.
,
Ebine
Y.
, and
Sasaki
T.
,
1989
, “
Metal Evaporated Tape for High Band 8 mm Video System
,”
IEEE Trans. Cons. Elec.
, Vol.
35
(
3
), pp.
421
428
.
10.
Cuddihy
E. F.
,
1980
, “
Aging of Magnetic Recording Tape
,”
IEEE Trans. Magn.
, Vol.
16
(
4
), pp.
558
568
.
11.
Diao, F., Kato, K., and Hayashi, K., 1998, “The Calculation Method of Maximum Tensile Stress on Hard Coating under Sliding Friction,” submitted to Tribology International.
12.
Feuerstein
A.
, and
Mayr
M.
,
1984
, “
High Vacuum Evaporation of Ferromagnetic Materials—A New Production Technology for Magnetic Tapes
,”
IEEE Trans. Magn.
, Vol.
20
(
1
), pp.
51
56
.
13.
Fuller
K. N. G.
, and
Tabor
D.
,
1975
, “
The Effect of Surface Roughness on the Adhesion of Elastic Solids
,”
Proc. Roy. Soc. Lond., Series A
, Vol.
345
, pp.
327
342
.
14.
Greenwood
J. A.
, and
Williamson
J. B. P.
,
1966
, “
Contact of Nominally Flat Surfaces
,”
Proc. Roy. Soc. Lond., Series A
, Vol.
295
, pp.
300
319
.
15.
Hedenqvist
P.
,
Olsson
M.
, and
Jacobson
S.
,
1990
, “
Failure Mode Analysis of TiN-Coated High Speed Steel: In Situ Scratch Adhesion Testing in the Scanning Electron Microscope
,”
Surface and Coatings Technology
, Vol.
41
, pp.
31
49
.
16.
Israelachvili, J., Fisher, L. R., Horn R. G., and Christenson, H. K., 1982, “Measurement of Adhesion and Short-Range Forces between Molecularly Smooth Surfaces in Undersaturated Vapours and in Organic Liquids,” Microscopic Aspects Of Adhesion and Lubrication, J. M. George, ed., Elsevier, Amsterdam, pp. 55–69.
17.
Kato, K., 1993, Materials Science and Technology, H. Mughrabi, ed., Vol. 6, Plastic Deformation and Fracture of Materials, New York, Ch. 13, pp. 635–680.
18.
Koka
R.
,
Pitchford
T.
,
Jesh
M.
, and
Egbert
D.
,
1993
, “
Studies on Head/Disc Contact Area Increase during Start/Stop and Continuous Drag Testing of Thin Film Disks
,”
Tribology Transactions
, Vol.
36
, pp.
1
10
.
19.
Kurokawa
H.
,
Mitani
T.
, and
Yonezawa
T.
,
1987
, “
Application of Diamond Like Carbon Films to Metallic Thin Film Magnetic Recording Media
,”
IEEE Trans. Magn.
, Vol.
23
(
5
), pp.
2410
2412
.
20.
Lancaster
J. K.
,
1990
, “
A Review of the Influence of Environmental Humidity and Water on Friction, Lubrication and Wear
,”
Tribology International
, Vol.
29
(
6
), pp.
371
389
.
21.
Lauer, J. M., and Jones, W. R., 1986, “Friction Polymers,” Tribology and Mechanics of Magnetic Storage Systems, ASLE SP-21, pp. 14–23.
22.
Li, Y., and Talke, F. E., 1990, “A Model for the Effect of Humidity on Stiction of the Head/Disk Interface,” Tribology and Mechanics of Magnetic Storage Systems, STLE SP-29, pp. 79–84.
23.
Matthewson, M. J., and Mamin, H. J., 1988, “Liquid Mediated Adhesion of Ultra-Flat Solid Surfaces,” Proc. Materials Research Society, Vol. 119.
24.
McFarlane
J. S.
, and
Tabor
D.
,
1950
, “
Adhesion of Solids and the Effect of Surface Films
,”
Proc. Roy. Soc. Lond., Series A
, Vol.
202
, pp.
224
243
.
25.
Novotny
V. J.
, and
Karis
T. E.
,
1991
, “
Sensitive Tribological Studies on Magnetic Recording Systems
,”
Advances in Information Storage Systems
, B. Bhushan, ASME Press Series, Vol.
2
, pp.
137
152
.
26.
Okuwaki
T.
,
Kawakita
T.
,
Akahane
N.
, and
Kusumoto
K.
,
1993
, “
Investigation on Tape-Head Contact in VTR
,”
IEEE Trans. Magn.
, Vol.
29
(
6
), pp.
3954
3956
.
27.
Osaki
H.
,
1993
, “
Role of Surface Asperities on Durability of Metal-Evaporated Magnetic Tapes
,”
IEEE Trans. Magn.
, Vol.
29
(
1
), pp.
11
20
.
28.
Osaki
H.
,
Fukushi
K.
, and
Ozawa
K.
,
1990
, “
Wear Mechanisms of Metal-Evaporated Magnetic Tapes in Helical Scan Videotape Recorders
,”
IEEE Trans. Magn.
, Vol.
26
(
6
), pp.
3180
3185
.
29.
Osaki
H.
,
Uchiyama
H.
, and
Honda
N.
,
1993
, “
Wear Mechanisms of Co-Cr Sputter Deposited Magnetic Tapes in Helical Scan Video Tape Recorders
,”
IEEE Trans. Magn.
, Vol.
29
(
1
), pp.
41
58
.
30.
Rabinowicz, E., 1965, Friction and Wear of Materials, Wiley, New York, p. 194.
31.
Smallen
M.
,
Mee
P. B.
,
Ahmad
A.
,
Freitag
W.
, and
Nanis
L.
,
1985
, “
Observations on Electrochemical and Environmental Corrosion Tests for Cobalt Alloy Disk Media
,”
IEEE Trans. Magn.
, Vol.
21
(
5
), pp.
1530
1532
.
32.
Stolarsky
T. A.
,
1994
, “
Analysis of the Resistance to Motion in a Sliding Contact
,”
Wear
, Vol.
171
, pp.
203
209
.
33.
Tomago
A.
,
Suzuki
T.
, and
Kunieda
T.
,
1985
, “
Effects of the Surface Configuration of Magnetic Layers on Durability against Mechanical Stress
,”
IEEE Trans. Magn.
, Vol.
21
(
5
), pp.
1524
1526
.
34.
Vom Wedge
F.
, and
Hornbogen
H.
,
1988
, “
Wear Properties of Metal-Evaporated Video Tape
,”
Wear
, Vol.
128
, pp.
291
305
.
This content is only available via PDF.
You do not currently have access to this content.