A kind of atmospheric pressure sintering preparation method of feal/tic composite material

A technology of atmospheric pressure sintering and composite materials, which is applied in the field of atmospheric pressure sintering preparation of FeAl/TiC composite materials, can solve the problems of product shape and size limitation, high preparation cost, complicated operation process, etc., and achieves high wear resistance, The effect of low cost and simple preparation process

Active Publication Date: 2015-11-11
XI'AN PETROLEUM UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing FeAl / TiC composite materials by normal pressure sintering, which overcomes the high preparation cost and the shape of the prepared product due to the complicated operation process of the hot press sintering process. and size are limited and other shortcomings, the use of atmospheric pressure sintering process has the characteristics of simple preparation process, low process cost, suitable for industrial production and conducive to the promotion of industrialization

Method used

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  • A kind of atmospheric pressure sintering preparation method of feal/tic composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) Mix pure Fe powder and pure Al powder according to Fe:Al=60:40 molar ratio to form Fe-Al mixed powder, put Fe-Al mixed powder into QM-1SP2 planetary ball mill, and grind balls and powder The mass ratio of Fe-Al intermetallic compound is 10:1, the ball mill speed is 350 rpm, the ball milling time is 60h, and the Fe-Al intermetallic compound powder is obtained after dry milling at room temperature;

[0015] 2) The Fe-Al intermetallic compound powder prepared in step 1) is subjected to a heat treatment process, the heat treatment temperature is 800 ° C, and the holding time is 1 h to obtain the FeAl intermetallic compound powder;

[0016] 3) Mix the FeAl intermetallic compound powder obtained in step 2) with TiC powder to form FeAl / TiC composite powder, wherein the content of FeAl intermetallic compound powder in FeAl / TiC composite powder is 10wt%, FeAl / TiC composite powder Strip specimens are formed by pressure forming with a forming pressure of 200MPa;

[0017] 4) Pu...

Embodiment 2

[0019] 1) Mix pure Fe powder and pure Al powder according to the molar ratio of Fe:Al=60:40 to form Fe-Al mixed powder, put Fe-Al mixed powder into QM-1SP2 planetary ball mill, and grind the ball and powder The mass ratio of the material is 10:1, the speed of the ball mill is 300 rpm, the ball milling time is 80h, and the Fe-Al intermetallic compound powder is obtained after dry grinding at room temperature;

[0020] 2) The Fe-Al intermetallic compound powder obtained in step 1) is subjected to heat treatment, the heat treatment temperature is 800°C, and the holding time is 0.5h to obtain the FeAl intermetallic compound powder;

[0021] 3) Mix the FeAl intermetallic compound powder prepared in step 2 with TiC powder to make FeAl / TiC composite powder, wherein the content of FeAl intermetallic compound powder in the FeAl / TiC composite powder is 20wt%, and FeAl / TiC composite The powder is made into a strip sample by pressure molding, and the molding pressure is 200MPa;

[0022] ...

Embodiment 3

[0024] 1) Mix pure Fe powder and pure Al powder according to the molar ratio of Fe:Al=60:40 to form Fe-Al mixed powder, put Fe-Al mixed powder into QM-1SP2 planetary ball mill, and grind the ball and powder The mass ratio of the material is 10:1, the speed of the ball mill is 400 rpm, the ball milling time is 40h, and the Fe-Al intermetallic compound powder is obtained after dry grinding at room temperature;

[0025] 2) The Fe-Al intermetallic compound powder obtained in step 1) is subjected to heat treatment, the heat treatment temperature is 800°C, and the holding time is 1.5h to obtain the FeAl intermetallic compound powder;

[0026] 3) Mix the FeAl intermetallic compound powder obtained in step 2 with TiC powder to make FeAl / TiC composite powder, wherein the content of FeAl intermetallic compound powder in the FeAl / TiC composite powder is 30wt%, and FeAl / TiC composite The powder is made into a strip sample by pressure molding, and the molding pressure is 300MPa;

[0027] ...

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Abstract

The invention relates to a preparation method for sintering a FeAl / TiC composite material under normal pressure, which comprises the following steps: 1) employing a mechanical alloying technology to prepare FeAl intermetallic compound powder; 2)poforming a high temperature hot treatment process on the FeAl intermetallic compound powder; wherein the ball-milling time of the mechanical alloying technology is 60 hours, the heat treatment temperature is 800 DEG C, and the insulation time is 1 hour; 3)mixing the prepared FeAl intermetallic compound powder and TiC powder to prepare the FeAl / TiC composite powder, and preparing a bar-shaped sample through compression moulding, and 4)performing a sintering process under normal pressure, wherein the sintering temperature is 1600 DEG C, insulating for 2 hours, and preparing the FeAl / TiC composite material bulk under normal pressure by the sintering process. According to the invention, the melting point of the FeAl intermetallic compound is 1250-1400 DEG C, when the sintering temperature is 1600 DEG C, the FeAl intermetallic compound is molten to be a liquid phase, the molten FeAl intermetallic compound and TiC particles are sintered together to form a compact sintering bulk. The preparation method has the advantages of low preparation cost, simple technology and suitability for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of FeAl / TiC composite materials, and in particular relates to a method for preparing FeAl / TiC composite materials by normal-pressure sintering. Background technique [0002] FeAl intermetallic compounds have high strength, high toughness, high melting point, high hardness and good wear resistance, corrosion resistance and high temperature oxidation resistance, and are widely used in engineering fields. Titanium carbide ceramics are widely used in engineering fields due to their high strength, high hardness and good wear resistance. However, titanium carbide ceramics are more brittle and have lower fracture toughness. In order to improve the mechanical properties of titanium carbide ceramics, it is necessary to add a strengthening and toughening phase to the TiC matrix. FeAl intermetallic compounds have good compatibility with TiC, and FeAl intermetallic compounds can be added to TiC matrix to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/02C22C1/05
Inventor 江涛
Owner XI'AN PETROLEUM UNIVERSITY
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