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| Property | Value | Conditions | Reference |
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| Friction coefficient | 0.04 | 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. | J.mater.Res,Vol. 12,No.1,Jan1997, p.59 |
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