Methods of Making Tungsten Carbide-based Annular Jewelry Rings

This Study relates to a method of making a finger ring which comprises:

Providing a jewelry finger ring that defines an aperture configured and dimensioned to receive a person's finger and which comprises a sintered mixture of at least two powdered materials comprising tungsten and a binder component in a relatively lesser amount than an amount of tungsten, with the annular ring having at least one external facet.

Tungsten carbide (WC) is a very hard ceramic (second only to diamond in hardness). It is a principle component in many powder metallurgy applications and is commonly referred to simply as carbide. Tungsten powder, either in elemental form or as a compound (most commonly WC), is either used alone or mixed with other powdered substances, such as other carbides, nitrides, ceramics and/or metals.  The other powdered substances are usually selected for the properties, such as color or corrosion resistance, they impart to the completed piece.  A powdered metal binder such as cobalt or nickel may also be included in the mixture.  The powdered mixture is then poured into a mold and pressed to form a blank which can be shaped. The blank is then heated. This "sinters" the blank into a very hard solid.

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