TY - JOUR
T1 - Boundary film for structural ceramic materials
AU - Ajayi, O. O.
AU - Erdemir, A.
AU - Hsieh, J. H.
AU - Erck, R. A.
AU - Fenske, G. R.
AU - Nichols, F. A.
PY - 1993/4/13
Y1 - 1993/4/13
N2 - Structural ceramic materials, like metals, will require lubrication if they are to be used extensively for tribological applications. The use of thin soft metallic coatings (specifically Ag) as a boundary film during mineral oil lubrication of silicon nitride (Si3N4) and zirconia (ZrO2) ceramic materials was investigated in this study. With a pin-on-flat contact configuration in reciprocating sliding, the steady friction coefficient was reduced by a factor of two (0.14-0.16 vs. 0.06-0.07) when the flats were coated with Ag. Also, with Ag coatings, the wear of pins was reduced to an unmeasurable level, whereas, in the absence of Ag coatings specific wear rates of about 2×10-9-4×10-8 mm3 N-1 m-1 and about 7×10-8-2×10-7 mm3 N-1 m-1 were measured for Si3N4 and ZrO2 pins respectively. In addition to preventing direct contact between pins and flats, thereby reducing wear, the Ag coatings also act as a solid lubricant, help dissipate flash heating, and accelerate modification of the λ ratio.
AB - Structural ceramic materials, like metals, will require lubrication if they are to be used extensively for tribological applications. The use of thin soft metallic coatings (specifically Ag) as a boundary film during mineral oil lubrication of silicon nitride (Si3N4) and zirconia (ZrO2) ceramic materials was investigated in this study. With a pin-on-flat contact configuration in reciprocating sliding, the steady friction coefficient was reduced by a factor of two (0.14-0.16 vs. 0.06-0.07) when the flats were coated with Ag. Also, with Ag coatings, the wear of pins was reduced to an unmeasurable level, whereas, in the absence of Ag coatings specific wear rates of about 2×10-9-4×10-8 mm3 N-1 m-1 and about 7×10-8-2×10-7 mm3 N-1 m-1 were measured for Si3N4 and ZrO2 pins respectively. In addition to preventing direct contact between pins and flats, thereby reducing wear, the Ag coatings also act as a solid lubricant, help dissipate flash heating, and accelerate modification of the λ ratio.
UR - http://www.scopus.com/inward/record.url?scp=0027578937&partnerID=8YFLogxK
U2 - 10.1016/0043-1648(93)90134-8
DO - 10.1016/0043-1648(93)90134-8
M3 - 文章
AN - SCOPUS:0027578937
SN - 0043-1648
VL - 162-164
SP - 1150
EP - 1155
JO - Wear
JF - Wear
IS - PART B
ER -