Powder blank with self-healing nature and method and related devices for making the same

Abstract

The subject application discloses a method of preparing a powder blank with self-healing nature and devices for making the same. The method includes: placing powder into a container with a conical wall; shaping the powder so that a central portion of a upper surface of the powder is raised relative to a peripheral portion; and pressing the powder in the container to form a powder blank, in which a peripheral portion of a upper surface is in a downwardly curved shape and a peripheral portion of a lower surface in a downwardly tapered conical shape.

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