Coated glass articles

A coated glass article for a mobile display cover comprising:

• a glass substrate having a composition comprising SiO2 in an amount greater than or equal to 50.0 mol % and less than or equal to 70.0 mol %, Al2O3 in an amount greater than or equal to 10.0 mol % and less than or equal to 25.0 mol %, Li2O in an amount greater than or equal to 5.0 mol % and less than or equal to 15.0 mol %, wherein the glass substrate comprises a first major surface and a second major surface, wherein the first major surface and the second major surface are opposing sides of the glass substrate, and wherein the glass substrate comprises:
• a depth of a compressive stress spike (DOLSP) of greater than or equal to 3 μm;
• an elastic modulus of greater than or equal to 72 GPa;
• and a fracture toughness of greater than or equal to 0.7 MPa·m0.5;
• and
• an optical coating disposed on the first major surface of the glass substrate, wherein the optical coating comprises a scratch-resistant layer and an anti-reflective coating comprising a plurality of alternating high refractive index and low refractive index layers disposed between the scratch-resistant layer and the glass substrate and over the scratch-resistant layer, wherein the thickness of the scratch-resistant layer is from about 500 nm to about 5000 nm, and wherein each of the plurality of alternating high refractive index and low refractive index layers disposed over the scratch-resistant layer have a thickness of less than 200 nm;
• and
• wherein the coated glass article exhibits:
• an average photopic transmittance of greater than 85% and an average photopic reflectance of less than 8%;
• a maximum hardness of from about 12 GPa to about 30 GP as measured at an indentation depth of about 600 nm from the anti-reflective surface of the optical coating, the maximum hardness measured by a Berkovich Indenter Hardness Test;
• and
• a retained strength of greater than or equal to 250 MPa.

A coated glass article comprising:

• a glass substrate comprising a first major surface and a second major surface, wherein the first major surface and the second major surface are opposing sides of the glass substrate,
• an optical coating disposed on the first major surface of the glass substrate, the optical coating forming an anti-reflective surface, wherein the optical coating comprises a scratch-resistant layer and an anti-reflective coating comprising a plurality of alternating high refractive index and low refractive index layers disposed between the scratch-resistant layer and the glass substrate and over the scratch-resistant layer, wherein the thickness of the scratch-resistant layer is from about 500 nm to about 5000 nm, and wherein each of the plurality of alternating high refractive index and low refractive index layers disposed over the scratch-resistant layer have a thickness of less than 200 nm;
• and
• wherein the coated glass article exhibits a maximum hardness of from about 10 GPa to about 30 GPa measured at an indentation depth of about 600 nm from the anti-reflective surface of the optical coating, the maximum hardness measured by a Berkovich Indenter Hardness Test;
• and
• wherein the coated glass article has a failure height of from about 50 cm to about 220 cm as measured according to a Drop Test Method on 80 grit Garnet sandpaper.