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A kind of high temperature and wear-resistant metal iron and alumina ceramic composite material and preparation method thereof

A technology of alumina ceramics and wear-resistant metals, which is applied in the field of high-temperature and wear-resistant metal iron and alumina ceramic composite materials and its preparation, which can solve the problems of poor wettability and achieve low cost, pure phase interface and good combination

Active Publication Date: 2017-06-27
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the shortcomings of poor wettability between alumina and iron, combined with the characteristics of rich rare earth metals in iron ore in my country, a kind of durable High-temperature wear-resistant metal iron and alumina ceramic composite material and the technical scheme of its preparation method:

Method used

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  • A kind of high temperature and wear-resistant metal iron and alumina ceramic composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0048] (1) Ingredients: Sieve to take dolomite, Al 2 o 3 Powder and activated carbon powder less than 74 micron materials are dried, the chemical analysis of Baiyun Obo mine is shown in Table 1, according to Baiyun mine, Al 2 o 3 The weight ratio of powder and carbon powder is 74 parts, 15 parts and 11.5 parts respectively, and the prepared powder is added into polyethylene glycol and absolute ethanol in a volume ratio of 2:1 to prepare a dispersant. 100cm 3 Add 83ml of dispersant to the material, moisten and mix in the ball mill for 48 hours, the ball-to-material ratio is 3:1, the speed of the ball mill: 100 rpm, and the material is mixed evenly; (2) tableting: take out the above-mentioned moistened and mixed ingredients Add 5% polyvinyl alcohol binder in weight percentage, according to every 10cm 3 Add 1.5ml of binder to the material and mix it evenly, and then perform tablet molding, the molding pressure is 5MPa, the holding time is 5 minutes, and it is pressed into C...

Embodiment 2

[0053] (1) Ingredients: Sieve to take dolomite, Al 2 o 3 Powder and activated carbon powder less than 74 micron materials are dried, the chemical analysis of Baiyun Obo mine is shown in Table 1, according to Baiyun mine, Al 2 o 3 The weight ratio of powder and carbon powder is 70 parts, 21 parts and 10 parts respectively, and the prepared powder is added into polyethylene glycol and absolute ethanol in a volume ratio of 2:1 to prepare a dispersant. 100cm 3 Add 83ml of dispersant to the material, moisten and mix in the ball mill for 24 hours, the ball-to-material ratio is 10:1, the speed of the ball mill: 200 rpm, and the material is mixed evenly; (2) tableting: take out the above-mentioned moistened and mixed ingredients Add 5% polyvinyl alcohol binder in weight percentage, according to every 10cm 3 Add 1.5ml of binder to the material, add and mix well, carry out tablet molding, carry out tablet molding, molding pressure 30MPa, holding time 5 minutes, press into Cylinder...

Embodiment 3

[0058] (1) Ingredients: Sieve to take dolomite, Al 2 o 3 Powder and activated carbon powder less than 74 micron materials are dried, the chemical analysis of Baiyun Obo mine is shown in Table 1, according to Baiyun mine, Al 2 o 3 The weight ratio of powder and carbon powder is 72 parts, 18 parts and 10.5 parts respectively, and the prepared powder is added to the ratio of glycerin and absolute ethanol to prepare a dispersant at a volume ratio of 2:1. 3 Add 83ml of dispersant to the material, moisten and mix in the ball mill for 36 hours, the ball-to-material ratio is 8:1, the speed of the ball mill: 250 rpm, and the material is mixed evenly; Add 5% polyvinyl alcohol binder in weight percentage, according to every 10cm 3 Add 1.5ml of binder to the material and mix it evenly to form a tablet. The molding pressure is 15MPa, and the holding time is 1 minute. Cylinder; (3) Hot-pressed high-temperature in-situ reaction: put the above-mentioned pellets in a hot-pressed furnace, ...

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Abstract

The invention provides a metallic iron and aluminum oxide ceramic composite material with high temperature resistance and wear resistance and a preparation method of the metallic iron and aluminum oxide ceramic composite material. The novel technical scheme provided by the invention is that the composite material mainly comprises three kinds of components in percentage by weight according to the proportion of all the components in the three components: (A) 33 to 48 weight percent of FeAl2O4, (B) 50 to 65 weight percent of metallic iron, and (C) 0.5 to 2.0 weight percent of a REO-FeO-Al2O3 solid solution, wherein REO refers to the oxides of rare earth metals; the preparation method comprises the steps of by taking iron ores in the oxides of the rare earth metals as raw materials, adding aluminum oxide and a reducing agent for performing in-situ hot pressing reaction to obtain the metallic iron and aluminum oxide ceramic composite material. The composite material has the advantages of small phase wetting angle, good interface combination, uniform distribution of a ceramic phase and a metal phase, high breaking tenacity and good wear resistance; the preparation method is simple in process, low in cost and controllable in proportion of the metal phase and the ceramic phase, and is expected to open up a new path for low-cost and high-added-value utilization of paragenetic iron ores rich in the rare earth metals in China.

Description

technical field [0001] The invention belongs to the field of metal-ceramic composite materials, and in particular relates to a high-temperature and wear-resistant metallic iron and alumina ceramic composite material and a preparation method thereof. Background technique [0002] Metal-ceramic composite material is a kind of room temperature and high temperature material between high temperature alloy and ceramics. It takes into account the high toughness and plasticity of metals and the high melting point, corrosion resistance and wear resistance of ceramics. It has broad application prospects in high temperature and other fields. According to the different ceramic phases, cermets are divided into oxide systems (Al2O3, ZrO2, MgO), carbide systems (TiC, SiC, WC), boride systems (TiB, ZrB, CrB) and nitride systems (TiN, BN , Si3N4, TaN), etc. Among them, the oxide system has the advantages of high hardness, good wear resistance, and oxidation resistance, and is widely used, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C22C32/00
Inventor 李保卫赵增武张福顺
Owner INNER MONGOLIA UNIV OF SCI & TECH
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