Glass laminate with buried stress spikes to arrest cracks and methods of making the same

A laminated glass article, comprising:

• a core layer comprising a core glass composition;
• and
• a cladding layer directly adjacent to the core layer and comprising a clad glass composition;
• wherein a stress of the cladding layer increases with increasing distance from an outer surface of the cladding layer from a compressive stress to a tensile stress, transitions to a compressive stress as a step-change at an interface region between the core layer and the cladding layer, and increases with increasing distance from the interface region to a center of the core layer from the compressive stress to a tensile stress, and
• wherein a maximum compressive stress of the core layer is greater than a maximum compressive stress of the cladding layer.

A method of preparing a laminated glass article comprising:

• laminating at least one core layer and at least one cladding layer to form a laminated glass article, the at least one core layer comprising an ion-exchangeable core glass composition and the at least one cladding layer comprising an ion-exchangeable clad glass composition;
• and
• contacting the laminated glass article with an ion exchange bath comprising at least one ion source for a time such that a stress of the at least one cladding layer increases with increasing distance from an outer surface of the at least one cladding layer from a compressive stress to a tensile stress, transitions to a compressive stress as a step-change at an interface region between the at least one core layer and the at least one cladding layer, and increases with increasing distance from the interface region to a center of the at least one core layer from the compressive stress to a tensile stress,
• wherein, after the contacting with the ion exchange bath, one or more of (i) a maximum compressive stress in the at least one core layer is greater than a maximum compressive stress in the at least one cladding layer and (ii) a maximum tensile stress in the at least one cladding layer is greater than or equal to a maximum tensile stress in the at least one core layer.