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Sintered ti-al based alloy porous material, application and method for improving its pore structure

A technology of porous materials and base alloys, applied in the field of porous materials and filter elements, to achieve excellent corrosion resistance, high tensile strength, and improve the effect of pore structure

Active Publication Date: 2015-08-05
成都易态膜分离技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the filing date of this application, a sintered Ti-Al based material that can not only improve the corrosion resistance of Ti-Al intermetallic compound porous materials, but also improve the pore structure of the material and achieve excellent comprehensive performance has not been found. alloy porous material

Method used

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  • Sintered ti-al based alloy porous material, application and method for improving its pore structure
  • Sintered ti-al based alloy porous material, application and method for improving its pore structure
  • Sintered ti-al based alloy porous material, application and method for improving its pore structure

Examples

Experimental program
Comparison scheme
Effect test

experiment example 10

[0035] The sintering system of Experimental Example 10 is relatively simple, specifically, the sintering temperature is gradually increased from room temperature to 1400°C, the heating rate is controlled at 15°C / min, and the total sintering time is 180 minutes.

experiment example 11

[0036] The sintering system of Experimental Example 11 is divided into four stages, the first stage is to gradually increase the sintering temperature from room temperature to 150°C, the heating rate is controlled at 3°C / min, and then keep the temperature for 30 minutes to complete the NH 4 HCO 3 The second stage is to gradually increase the sintering temperature from 150°C to 480°C, the heating rate is controlled at 8°C / min, and then keep the temperature for 120 minutes to complete the TiH 2 Dehydrogenation pore formation; the third stage is to gradually increase the sintering temperature from 480°C to 620°C, the heating rate is controlled at 2°C / min, and then keep the temperature for 240 minutes to complete the reaction pore formation of Ti and Al to generate Ti-Al binary Intermetallic compound; the fourth stage is to gradually increase the sintering temperature from 620°C to 1300°C, control the heating rate at 5°C / min, and then keep it for 300 minutes to promote the reactio...

experiment example 12

[0037] The sintering system of Experimental Example 12 is divided into four stages, the first stage is to gradually increase the sintering temperature from room temperature to 350 °C, the heating rate is controlled at 5 °C / min, and then keep the temperature for 60 minutes to complete the NH 4 HCO 3 The second stage is to gradually increase the sintering temperature from 350°C to 560°C, the heating rate is controlled at 10°C / min, and then keep the temperature for 60 minutes to complete the TiH 2 Dehydrogenation pore formation; the third stage is to gradually increase the sintering temperature from 560°C to 950°C, the heating rate is controlled at 1°C / min, and then keep warm for 360 minutes to complete the reaction pore formation of Ti and Al to form Ti-Al binary Intermetallic compounds; the fourth stage is to gradually increase the sintering temperature from 950°C to 1400°C, the heating rate is controlled at 3°C / min, and then kept for 420 minutes to promote the reaction of Ti-A...

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Abstract

The invention discloses a sintering Ti-Al-based alloy porous material capable of improving corrosion resistance, a filtering element applying the material, and a method for improving the pore structure of the material. The sintering Ti-Al-based alloy porous material has the following characteristics: a) the material mainly comprises three elements of Ti, Al and C, and the total weight of the three elements accounts for over 90 percent of the weight of the sintering material, wherein Ti is 50 to 85 percent of the total weight of Ti and Al, and C is 0.5 to 15 percent of the total weight of Ti and Al; b) the C of the material mainly exists in at least one form of a carbon solid solution of a Ti-Al-based compound and carbide of a Ti-Al-based compound, or mainly exists in the forms of carbide of the Ti-Al-based compound and TiC, and is uniformly distributed in the sintering Ti-Al-based alloy porous material roughly; c) the porosity is 30 to 60 percent; the average aperture is 0.5 to 50 microns; the tensile strength is more than or equal to 30 MPa; the pure water filtration flux of the sintering Ti-Al-based alloy porous material with the thickness being less than or equal to 5 mm is more than or equal to 1 t / m2.h at 0.05Mpa filter pressure difference; the weight loss ratio is below 0.8 percent after the sintering Ti-Al-based alloy porous material is soaked in 5 wt% hydrochloric acid solution at room temperature for 8 days.

Description

technical field [0001] The invention relates to a porous material and a filter element using the porous material, in particular to a sintered Ti-Al-based alloy porous material prepared by a powder metallurgy method and a filter element using the porous material. The invention also relates to a method for improving the pore structure of the sintered Ti-Al base alloy porous material. Background technique [0002] At present, the research on sintered porous materials mainly focuses on the optimization of preparation process, the discussion of pore-forming mechanism, the improvement of material properties and the expansion of application range. Among them, as far as the pore-forming mechanism is concerned, the pore-forming methods that have been applied in the preparation method of sintered porous materials mainly include: first, the pore is formed by chemical reaction, which is based on the large difference in the intrinsic diffusion coefficient of different elements. The part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C14/00
Inventor 高麟汪涛李波
Owner 成都易态膜分离技术有限公司