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Method for sintering zirconium diboride ceramic material

A technology of ceramic materials and sintering methods, which is applied in the field of preparation of inorganic composite materials, can solve the problems of not promoting ZrB2 well and uneven dispersion of the matrix, and achieve the improvement of various properties, density and performance, and uniform distribution Effect

Active Publication Date: 2013-04-03
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of sintering method of zirconium diboride ceramic material, can overcome SiC and ZrSi that existing method exists 2 Inhomogeneity in matrix dispersion and poor promotion of ZrB at low temperatures 2 Problems with Ceramic Densification

Method used

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  • Method for sintering zirconium diboride ceramic material
  • Method for sintering zirconium diboride ceramic material
  • Method for sintering zirconium diboride ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh ZrB 2 Powder 40g, ZrC powder 5.5059g, Si powder 4.4941g, pour all the weighed materials into a ball milling tank, add alcohol and 100g of zirconia grinding balls, and mix the materials on the ball mill at 150 rpm for 4 hours. The ball-milled material is filtered and dried in a vacuum drying oven, and sieved 3 times after drying to obtain a mixed raw material mixture.

[0024] Weigh 25g of the above mixed raw material mixture, put it into a graphite mold with a diameter of 30mm, and perform spark plasma sintering in a vacuum atmosphere. The temperature is raised to 1500°C at 100°C / min, and the temperature is kept for 5 minutes, the pressure is 40MPa, and it is obtained after natural cooling. ZrB 2 -SiC-ZrSi 2 Ceramic composite material, SiC and ZrSi in the material 2 The theoretical mass percentage is 20wt%.

[0025] figure 1 The ZBZSS20 pattern is the XRD pattern of the sintered sample. It can be seen from the figure that except for ZrB 2 In addition to the diffraction...

Embodiment 2

[0027] Weigh ZrB 2 Powder 35g, ZrC powder 8.2588g, Si powder 6.7412g, pour all the weighed materials into a ball milling tank, add alcohol and 100g of zirconia balls, and mix the materials on a ball mill at 150 revolutions / min for 4 hours. The ball-milled material is filtered and placed in a vacuum drying box for drying, and then sieved 3 times after drying to obtain a mixed raw material mixture.

[0028] Weigh 25g of the above mixed raw material mixture, put it into a graphite mold with a diameter of 30mm, perform spark plasma sintering in a vacuum atmosphere, raise the temperature to 1500°C at 100°C / min, hold it for 10 minutes, pressure 30MPa, and cool down. ZrB 2 -SiC-ZrSi 2 Ceramic composites, SiC and ZrSi in materials 2 The theoretical mass percentage is 30wt%.

[0029] figure 1 The ZBZSS30 pattern is the XRD pattern of the sintered sample. It can be seen from the figure that except for ZrB 2 SiC and ZrSi can also be seen outside the diffraction peaks 2 The diffraction peak is...

Embodiment 3

[0031] Weigh ZrB 2 Powder 30g, ZrC powder 11.0117g, Si powder 8.9883g, pour all the weighed materials into a ball milling tank, add alcohol and 100g of zirconia balls, and mix the materials on a ball mill at 150 rpm for 4 hours. The ball-milled material is filtered and placed in a vacuum drying box for drying, and then sieved 3 times after drying to obtain a mixed raw material mixture.

[0032] Weigh 25g of the above mixed raw material mixture, put it into a graphite mold with a diameter of 30mm, perform spark plasma sintering in a vacuum atmosphere, raise the temperature to 1500°C at 100°C / min, hold for 15 minutes, pressure 20MPa, and cool down. Get ZrB 2 -SiC-ZrSi 2 Ceramic composites, SiC and ZrSi in materials 2 The theoretical mass percentage is 40wt%.

[0033] figure 1 The ZBZSS40 pattern is the XRD pattern of the sintered sample. It can be seen from the figure that except for ZrB 2 SiC and ZrSi can also be seen outside the diffraction peaks 2 Diffraction peaks, SiC and ZrSi 2...

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Abstract

The invention belongs to the technical field of inorganic composite material preparation, and in particular relates to a method for sintering a zirconium diboride ceramic material. The zirconium diboride ceramic material is prepared from ZrB2, ZrC and Si powder by a discharge plasma sintering process. The ZrB2-SiC-ZrSi2 super-high temperature ceramic material with complete compactness and excellent performance is prepared at a lower temperature of 1500 DEG C.

Description

Technical field [0001] The invention belongs to the technical field of inorganic composite material preparation, and particularly relates to a method for sintering a zirconium diboride ceramic material. Background technique [0002] With the rapid development of aerospace and national defense, modern aircraft (such as supersonic vehicles, missiles, space shuttles, etc.) are developing in a high-speed, high-altitude and safer direction, which imposes more and more demanding requirements on ultra-high temperature materials. Requirements: Be able to adapt to extreme environments such as supersonic cruise flight, atmospheric reentry, long-endurance flight across the atmosphere, and rocket propulsion. The research on ultra-high temperature materials is a key technical requirement for the development of aerospace and national defense. Therefore, the research on ultra-high temperature materials has very important strategic significance in the country's aerospace and defense industry. ...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/64
Inventor 王海龙陈建宝赵笑统张锐张钲卢红霞许红亮陈德良范冰冰
Owner ZHENGZHOU UNIV
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