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Preparation method of sintered porous material

A technology of porous material and sintering temperature is applied in the fields of preparation of the sintered porous material, sintered porous material and filter element applying the porous material, and achieves the effects of excellent corrosion resistance, good corrosion resistance and reduced passing resistance.

Active Publication Date: 2013-09-25
CHENGDU INTERMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Before the filing date of this application, a sintered porous material similar to Ti-Al intermetallic compound porous material, which has the common characteristics of both metal materials and ceramic materials, and has stronger corrosion resistance has not been found.

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  • Preparation method of sintered porous material
  • Preparation method of sintered porous material
  • Preparation method of sintered porous material

Examples

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preparation example Construction

[0016] The preparation method of the sintered porous material and the sintered porous material obtained by these methods will be described in detail through experiments below. Through these descriptions, those skilled in the art can clearly understand the outstanding features of the sintered porous material of the present application. The numbers of the experimental examples mentioned below correspond to the numbers corresponding to "green compact" and "sample".

[0017] In order to illustrate the sintered porous material of the present application and its preparation, the following 10 sets of experimental examples have been prepared. Among them, samples 1 to 5 respectively prepared through experimental examples 1 to 5 all belong to the scope of the sintered porous material to be protected in claim 1 of the present application. Experimental examples 6 to 10 are comparative experiments embodying the substantive characteristics and technical effects of experimental examples 1 t...

experiment example 8

[0031] The sintering system of Experimental Example 8 is relatively simple, specifically, the sintering temperature is gradually increased from room temperature to 1300°C, the heating rate is controlled at 15°C / min, and the total sintering time is 180 minutes.

experiment example 9

[0032] The sintering system of Experimental Example 9 is divided into four stages, in which 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, control the heating rate at 2°C / min, and then keep it for 240 minutes to complete the reaction pore formation of Ti and Si to generate Ti-Si binary Intermetallic compounds; 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 warm for 300 minutes to promote the reacti...

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Abstract

The invention discloses a preparation method of a sintered porous material with strong corrosion resistance. The preparation method comprises the steps of: sequentially granulating, drying, forming and sintering mixed powder of at least one of Ti powder and TiH2 power, as well as Si powder and C powder so as to prepare the sintered porous material. The content of Ti in the sintered porous material prepared from the raw materials is 60-75 percent of the total weight of the Ti, Si and C, and the content of Si is 10-20 percent of the total weight of the Ti, the Si and C; the sintering schedule comprises five stages, namely firstly gradually raising the sintering temperature from room temperature to 450 DEG C, wherein the temperature raising rate is controlled to be 1-25 DEG C / min, and the total sintering time of the first stage is 30-600min; secondly, gradually raising the sintering temperature from 450 DEG C to 900 DEG C, wherein the temperature raising rate is controlled to be 1-20 DEG C / min, the total sintering time of the second stage is 180-1000min; thirdly, gradually raising the sintering temperature from 900 DEG C to 1000 DEG C, wherein the temperature raising rate is controlled to be 1-20 DEG C / min, and the total sintering time of the third stage is 30-1000min.

Description

technical field [0001] The invention relates to a porous material and a filter element using the porous material, in particular to a sintered porous material prepared by a powder metallurgy method and a filter element using the porous material. The invention also relates to a preparation method of the sintered 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 partial diffusion effect makes Kirkendall pores in the mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C29/00C04B38/00C04B35/515
Inventor 高麟贺跃辉汪涛江垚李波
Owner CHENGDU INTERMENT TECH
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