Ceramic manufactures

摘要

Ceramic bodies can be made by providing an initial green body of ceramic; and machining the initial green body to provide a machined green ceramic body. Embedding the initial green body in an embedding mass can be avoided. The initial green body can be bisqued, infiltrated an adjuvant such as machining wax, removing the infiltrated body, and machining it. Highly detailed ceramic products can be generated. The machined green ceramic body may be fired and/or further processed to provide a more finished ceramic body. Examples include a femoral component for a posterior stabilized knee implant, a component body for an artificial rotation device containing knee implant prosthesis a dental implant or bridge, an ice skating blade, and so forth. Zirconia ceramics are advantageously employed, for an example, Mg-TTZ.

主权项

1. An article of manufacture comprising a prosthetic implant or prosthetic implant component of Mg-TTZ ceramic, which is made of or to include the Mg-TTZ ceramic by a method that includes providing a bisqued initial green body of ceramic by providing a powdered ceramic material, which substantially is a monoclinic zirconia having magnesium oxide for a stabilizer, and, without employing a binder additional to the powdered ceramic to do so:
compressing the material in its powder form through a cold isostatic press operation to form a raw, pressed initial green body, and then heating the raw, pressed initial green body to a bisque stage to provide the bisqued initial green body; and, after the foregoing steps are carried out without employing a binder additional to the powdered ceramic material, carrying out the following further steps: without embedding the bisqued initial green body of ceramic in an embedding mass, machining the bisqued initial green body to provide a machined, bisqued green ceramic body such that the machined, bisqued green ceramic body has a shape, which is a precursor shape essentially analogous to, being of the same proportions as, the shape of, but larger than, the ceramic portion of a fired predetermined finished ceramic body prosthetic implant or prosthetic implant component; and then firing the machined, bisqued green ceramic body to provide a fired Mg-TTZ ceramic body product, which is the same size and shape or essentially the same size and shape as the ceramic portion of the fired predetermined finished ceramic body prosthetic implant or prosthetic implant component.