Novel metal ceramic composite material and preparation method thereof

A composite material and cermet technology, which is applied in the field of cermet composite materials, can solve the problems affecting the efficiency of ilmenite utilization, the industrialization process of ilmenite, the low degree of comprehensive utilization of iron, and the intractability of waste acid mother liquor. Comprehensive mechanical properties, excellent wear resistance, easy to operate

Inactive Publication Date: 2010-10-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned comprehensive utilization methods of ilmenite have problems such as high energy consumption, low comprehensive utilization of iron, or difficult treatment of waste acid mother liquor, which affects the efficiency of ilmenite utilization and the industrialization process of ilmenite

Method used

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  • Novel metal ceramic composite material and preparation method thereof
  • Novel metal ceramic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of preparation technology of metal-ceramic composite material, its concrete steps are as follows:

[0024] (1) Weigh 49.91 grams of ilmenite powder, 17.72 grams of aluminum powder and 3.94 grams of graphite according to the molar ratio of FeTiO3+2Al+C+0Fe on an electronic balance.

[0025] (2) Pour the mixed powder into a ball mill tank with a ball-to-material ratio of 12:1, and ball mill for 4 hours; then, put the ball-milled powder into a desiccator for drying.

[0026] (3) Put the mixture into a hot-pressed graphite mold, put it into a hot-pressed furnace, and pass nitrogen protection after vacuuming.

[0027] (4) Pre-press the powder once during the heating process, and then pressurize 21Mpa when it reaches 1400°C.

[0028] (5) Hold at 1400° C. for 30 minutes under pressure of 21 MPa, and finally cool to obtain metal-ceramic composite material A.

[0029] (6) The mechanical properties of the obtained composite material A are shown in Table 1, and the chemic...

Embodiment 2

[0031] A method for preparing a metal-ceramic composite material is prepared by ball milling technology and hot pressing technology, and the steps are as follows:

[0032] (1) The raw materials are ilmenite powder, aluminum powder, graphite and iron powder. Weigh 39.71 grams of ilmenite powder, 14.11 grams of aluminum powder, 3.13 grams of graphite and 14.63 grams of iron powder on an electronic balance according to the molar ratio of FeTiO3+2Al+C+1Fe.

[0033] (2) Pour the mixed powder into a ball mill jar with a ball-to-material ratio of 12:1, mill for 4 hours, and then put the ball-milled powder into a dryer for drying.

[0034] (3) Put the mixed material into a hot-pressed graphite mold, put it into a hot-pressed furnace, and ventilate nitrogen protection after vacuumizing;

[0035] (4) Pre-press the powder once during the heating process, and then pressurize 21MPa when it reaches 1200°C;

[0036] (5) Hold at 1200° C. under pressure of 21 MPa for 30 minutes, and finally ...

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Abstract

The invention relates to a novel metal ceramic composite material and a preparation method thereof. The novel metal ceramic composite material adopts Al2O3 ceramic as matrix and adopts Ti(C, N) ceramic hard particles and Fe metal as disperse phase. The novel metal ceramic composite material comprises the following main components by weight percent: 50-70 percent of Al2O3, 20-30 percent of Ti(C, N), 5-20 percent of Fe and the balance of inevitable impurities such as Mn, Si, Ca and the like. The preparation method selects Panzhihua ilmenite (FeTiO3) as raw material rich in China, adopts a hot pressed sintering technique to directly prepare low-cost Al2O3/Ti(C, N)/Fe metal ceramic composite material on the basis of carbothermal and aluminithermic reduction. Compared with the similar metal ceramic composite material, the novel metal ceramic composite material has quite good comprehensive mechanical property and excellent wear resistance, corrosion resistance, oxidation resistance, thermal shock resistance and the like, also has simple preparation technique and low cost and opens up a new way for fully and effectively utilizing rich resources in China.

Description

technical field [0001] The invention relates to a metal-ceramic composite material, in particular to a metal-ceramic composite material with high hardness and high wear resistance and a preparation method thereof. Background technique [0002] Metal-ceramic composites are classified according to the different ceramic phases. Divided into oxide-metal composites, carbide-metal composites, nitride-metal composites, boride-metal composites, boron carbide-metal composites and silicide-metal composites. It has various varieties and different structures, all of which have different strength, hardness, wear resistance and oxidation resistance, and are widely used in electronic devices, metallurgy, chemical industry, aerospace and other fields. [0003] Ti(C,N) / Al 2 o 3 Cermets not only have high hardness, wear resistance, red hardness, excellent chemical stability, and extremely low friction coefficient between metals, but also have certain toughness and strength. Compared with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/12C22C1/05
Inventor 汤爱涛刘胜明潘复生王健刘传璞
Owner CHONGQING UNIV
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