A metallic glass formed from an alloy having the elements: Zr from 45 to 68 atomic percent, and Cu less than 25 atomic percent; and Al having between 9 and 12 atomic percent; and Ti from 0.5 to 10 atomic percent; and Nb from 0.1 to 6 atomic percent; and other elements not more than 0.1% by weight each and not more than 0.5% by weight in total; and the total sum of the preceding elements being equal to 100% by weight in total; and the sum Zr+Nb+Ti is between 64 and 69 atomic percent. The invention also relates to a part made of metallic glass and to its manufacturing method.

The invention relates to a process of producing a dental zirconia article, the process comprising the step of sintering a porous dental zirconia article, the sintering comprising a heat-treatment segment A characterized by a heating rate of at least 3 K/sec up to a temperature of at least 1,200 C., the porous dental zirconia article being composed of a zirconia material containing 6.0 to 8.0 wt. % yttria, 0.05 to 0.12 wt. % alumina and comprising a coloring component containing Tb, the porous dental zirconia article being essentially free of Fe components. The invention also relates to a process comprising the additional step of applying a glazing composition to the outer surface of the porous zirconia article before the heat-treatment or sintering is conducted.

The invention relates to a process of producing a dental zirconia article, the process comprising the step of sintering a porous dental zirconia article, the sintering comprising a heat-treatment segment A characterized by a heating rate of at least 3 K/sec up to a temperature of at least 1,200 C., the porous dental zirconia article being composed of a zirconia material containing 6.0 to 8.0 wt. % yttria, 0.05 to 0.12 wt. % alumina and comprising a coloring component containing Tb, the porous dental zirconia article being essentially free of Fe components. The invention also relates to a process comprising the additional step of applying a glazing composition to the outer surface of the porous zirconia article before the heat-treatment or sintering is conducted.