Method of preparing oxide dispersion strengthening medium-entropy alloy

A technology of dispersion strengthening and entropy alloying, which is applied in the field of preparation of medium-entropy alloy materials, can solve the problems of excessively large oxide particles, which have not been seen in literature reports, and achieve the effect of uniform distribution.
CN108421985AInactive Publication Date: 2018-08-21UNIV OF SCI & TECH BEIJING
4 Cites 19 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2018-08-21
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention relates to a method of preparing an oxide dispersion strengthening medium-entropy alloy and belongs to the field of preparation of medium-entropy alloy materials. The method comprises the following steps: firstly, weighing metal powder equal in atomic weight and weighing a proper amount of Y2O3 powder and Ti powder; reducing the metal powder in a hydrogen reduction furnace after fully mixing; then encapsulating the metal powder with grinding balls together in a stainless steel ball-milling tank to be ball-milled in an inert gas atmosphere for alloying the metal powder; sinteringthe ball-milled alloyed metal powder into blocks through a discharge plasma sintering furnace for curing the alloy powder; and then thermally treating the sintered and formed blocks in a muffle furnace; and then air cooling the furnace. The nanometer oxides in the prepared oxide dispersion strengthening medium-entropy alloy are uniform in particle distribution, and the average dimensions are 5-6nm, the average dimensions of the oxide particles are 5-20nm, and the density of the sintered sample reaches over 99% of theoretical density.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of preparation of medium-entropy alloy materials, and in particular relates to a method for strengthening medium-entropy alloys by using oxide dispersion. Background technique

[0002] Compared with conventional alloys, medium-entropy alloys generally have two to four principal elements in close or equiatomic ratios. Similar to high-entropy alloys, medium-entropy alloys have many excellent properties, such as high-temperature stability, high hardness, excellent corrosion resistance and wear resistance, and improved fatigue and fracture resistance of materials. Up to now, there have been reports on the preparation of medium-entropy alloys by arc melting and vacuum induction melting (Bernd Gludovatz, Anton Hohenwarter. Exceptional damage-tolerance of a medium-entropy alloy CrCoNi at cryogenic temperatures[J].Nature Communications,7(2016) 10602. G. Laplanche, A. Kostka. Reasons for the superior mechanical properties of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More