Effect of grinding parameters on surface integrity and flexural strength of 3Y-TZP ceramic

Grinding parameter effects on grinding forces, the surface phase transformation of tetragonal to monoclinic (t-m), surface residual stress, surface roughness, and flexural strength of 3 mol% Yttrium stabilized Tetragonal Zirconia Polycrystal (3Y-TZP) were investigated. The results have shown that the grinding force, compressive residual stress, and surface roughness increase with the increase in depth of cut and the feed speed. On the other hand, they decreased as the wheel speed increased. Additionally, grinding improved the 3Y-TZP surface t-m phase transformation. The m-phase content increased with the increase in the depth of cut and decreased as the wheel speed increased. Finally, the flexural strength of ground 3Y-TZP diminished with the increase in the cut depth. The fracture and smear were observed on the dry ground surface since it has a higher surface roughness compared to that of wet grinding.

Automated summary

This study investigates the effects of grinding parameters on the properties of 3Y-TZP, including grinding forces, surface phase transformation, residual stress, surface roughness, and flexural strength. The results show that increasing the depth of cut and feed speed increases the grinding forces, compressive residual stress, and surface roughness, while increasing the wheel speed has the opposite effect. Grinding also promotes the surface phase transformation of 3Y-TZP, with the phase content increasing with depth of cut and decreasing with wheel speed. Moreover, the flexural strength of ground 3Y-TZP decreases with increasing cut depth. Dry grinding leads to higher surface roughness and the presence of fractures and smears.