Method for producing articles from iridium metal

Abstract

A method for producing articles from iridium metal nanopowder. This invention relates to the sphere of powder metallurgy and may find application in the production of different articles from iridium. Technically, the object of the invention is development of a new technology. To this aim a method is proposed for the production of articles from iridium based on use of chemically pure metal of not less than 99.99 purity, produced by electron-beam remelting, characterized in that the required material is turned to nanopowder of less than 100 nm dispersity from which seamless articles of various configuration are molded by their compacting at room temperature followed by baking, with the resulting isotropic structure featuring 100-300 nm grain size and strength characteristics being improved by 200-300%.

Claims

1. A method for producing seamless articles from chemically pure iridium of no less than 99.99 wt. % purity and of an isotropic structure having a grain size between 100-300 nm, the method comprising compacting a disperse powder of the iridium of no less than 100 nm under pressure between 150-350 MPa at a room temperature followed by baking at a temperature between 1000-1350 C.

Description

DESCRIPTION OF THE EMBODIMENTS

(1) Examples of articles produced from iridium:

(2) A method for producing articles from iridium: container material (crucible) for obtaining optical monocrystals used in laser technology and microelectronics.

(3) High-purity iridium nanopowder is loaded in an elastic sealed shell, compacted by vibration during 30 min at 50 Hz vibration frequency, and, by isostatic compacting at 150-350 MPa at room temperature, an article is molded and subsequently baked at 1000-1350 C.

(4) A method for the production of article: iridium wire.

(5) High-purity iridium nanopowder is loaded in an elastic sealed shell, compacted by vibration during 30 min at 50 Hz vibration frequency, and, by isostatic compacting at 150-350 MPa at room temperature, a blank in the form of a cylindrical bar is molded and subsequently baked at 1000-1350 C. The bar is further used for making iridium wire of the required diameter.