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The main advantage of Zirconia Toughened Alumina (ZTA) from HMA Wear Solutions is the additional strength and toughness over Alumina, combined with a lower cost. The combination of aluminium oxide and zirconium oxide provides for much greater strength, toughness, hardness, and wear resistance than Alumina alone. The 20% to 30% increase in strength often provides the design criteria needed at a much lower cost than using a pure zirconia product.
A process called transformation toughening is the phenomenon that increases the fracture toughness of ZTA from HMA Wear Solutions. When placed under stress, the zirconia particles transform their crystal structure from a tetragonal to a monoclinic shape, resulting in a volume expansion that compresses the surrounding crack in the Alumina matrix. ZTA is ideal for any application where structural strength is needed that exceeds the standard properties of Alumina.