Second-phase dispersion strengthened iridium material and preparation method thereof

Abstract

The invention relates to the technical field of metal materials, in particular to a second-phase dispersion strengthened iridium material and a preparation method thereof. The material aims to solve the problem in the prior art that a high-temperature stressed part of an iridium crucible is prone to deformation. The preparation method is characterized by comprising the following steps that S1, 1Vol.%-3Vol.% of high-melting-point high-hardness nanoscale particles and pure iridium powder are subjected to ball milling and then evenly mixed, and a mixture is put into a plastic mold to be subjectedto isostatic cool pressing to obtain a green body; S2, the green body is put into a vacuum sintering furnace to be sintered, the density reaches 95%-97% after sintering, then preheating is conductedin a high-temperature muffle furnace, and a preheated strengthened iridium blank is placed on an air hammer for repeated forging; S3, after forging is finished, the strengthened iridium blank is put into the muffle furnace to be subjected to stress relief, then water cooling is conducted, a novel iridium strengthened material is obtained, and the density reaches 99.5% or above. The structure texture of the iridium material is effectively controlled, it is guaranteed that the iridium material has high strength and high plasticity simultaneously, and the material is not prone to cracking in theforging process.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a method for preparing a second-phase dispersion-strengthened iridium material. Background technique [0002] Compared with other metals, iridium has the characteristics of high melting point, high strength, oxidation resistance, acid and alkali corrosion resistance, etc. Therefore, in the field of high temperature crystal growth, metal iridium has been widely used, and iridium crucible and iridium pulling crystal rod have become common single Crystal growth equipment. [0003] With the development of science and technology, the types of single crystal growth are gradually increasing, and the size of single crystal growth is gradually increasing. Long (up to 40 days for a single furnace). In order to prolong the service life of iridium equipment and avoid large high-temperature deformation and leakage, the thickness of the crucible body and bottom of the large-scale iri...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the high-temperature force-bearing parts of the iridium crucible are prone to deformation and high maintenance costs in the prior art, thereby providing a second-phase dispersion-strengthened iridium material and its preparation method