At the begining of scratching & from an abrupt increase in friction during scratching, width of scratch(1.75 um) at about 17-20 mN normal load(measured from SEM images),critical load=9 mN.
J.Mater.Res,Vol.12,No.1,Jan 1997, p.59
Friction coefficient
0.35
At the end of scratching & from an abrupt increase in friction during scratching, width of scratch(1.75 um) at about 17-20 mN normal load(measured from SEM images),critical load=9 mN.
J.Mater.Res,Vol.12,No.1,Jan 1997, p.59
Friction coefficient(final)
0.35
Values obtained during scratching, critical load=9 mN,width of scratch(by SEM observations)=1.75um
J.Mater.Res.,Vol.12,No.1,Jan1997, p.59
Friction coefficient(initial)
0.04
Values obtained during scratching, critical load=9 mN,width of scratch(by SEM observations)=1.75um
J.Mater.Res.,Vol.12,No.1,Jan1997, p.59
Friction coefficient,final
0.06
Sliding against a spherical diamond tip (radius=20um)at 10 mN normal load, 7.0 mmstroke length,0.1 Hz frequency,and 1.0 mm/sec average linear speed for a sliding distance of 4m under an ambient temperature of about 22+-1 C and a relative humidity of about 45+-5% RH.
J.Mater.Res,Vol.12,No.1,Jan 1997, p.60
Friction coefficient,final
0.46
Sliding against a single-crystal sapphire ball(diameter=3mm) at 10 mN normal load,7.0 mmstroke length,0.1 Hz frequency,and 1.0 mm/sec average linear speed for a sliding distance of 4m under an ambient temperature of about 22+-1 C and a relative humidity of about 45+-5% RH.
J.Mater.Res,Vol.12,No.1,Jan 1997, p.60
Friction coefficient,initial
0.06
Sliding against a spherical diamond tip (tip radius, 20 um) at 10 mN normal load, 7.0 mm stroke length, 0.1 Hz frequency, and 1.0 mm/sec average linear speed for a sliding distance of 4 m under an ambient temperature of 22 +-1 deg C and a relative humidity of about 45 +-5% RH.
J.Mater.Res,Vol.12,No.1,Jan 1997, p.60
Friction coefficient,initial
0.3
Sliding against a single-crystal sapphire ball(diameter,3mm) at 10 mN normal load,7.0 mmstroke length,0.1 Hz frequency,and 1.0 mm/sec average linear speed for a sliding distance of 4m under an ambient temperature of about 22+-1 C and a relative humidity of about 45+-5% RH.
J.Mater.Res,Vol.12,No.1,Jan 1997, p.60
Hardness
12.6 GPa
Values obtained by nanodentation at a load of 15 mN and indentation depth of 265 nm at peak load.
J.mater.Res,Vol. 12,No.1,Jan1997, p.59
Hardness
12.8 GPa
Values obtained by nanodentation at a load of 0.2 mN with indentation depth at peak load 24 nm.
J.mater.Res,Vol. 12,No.1,Jan1997, p.59
Roughness(Rms)
0.18 nm
Value measured using AFM at a scan size of 1 um x 1 um.
J. Mater. Res., Vol. 12 No. 1, Jan 1997, p.60
Young's Modulus
203 GPa
Values obtained by nanodentation at a load of 0.2 mN with indentation depth at peak load 24 nm.
J.mater.Res,Vol. 12,No.1,Jan1997, p.59
Young's Modulus
181 GPa
Values obtained by nanodentation at a load of 15 mN and indentation depth of 265 nm at peak load.