Y-TZP

Y = Yttrium.

TZP = Tetragonal Zirconia Polycrystal.

Y-TZP is a partly stabilized zirconium or Yttria-stabilized zirconium.

Pure zirconium dioxide changes from monoclinic (stable at room temperature) to tetragonal (at about 1173 °C) and then to cubic phase (at about 2370 °C).