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 uneven matrix dispersion and inability to promote ZrB2 well, and achieve improved performance, density and performance, and uniform distribution Effect

Active Publication Date: 2014-03-26
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 40g of ZrC powder, 5.5059g of ZrC powder, and 4.4941g of Si powder. Pour all the weighed materials into a ball mill jar, add alcohol and 100g of zirconia balls, and mix the materials on a ball mill at 150 rpm for 4 hours. After the ball milled material is filtered, it is dried in a vacuum drying oven, and after drying, it is sieved 3 times to obtain a mixed raw material mixture.

[0024] Weigh 25g of the above-mentioned mixed raw material mixture, put it into a graphite mold with a diameter of 30mm, carry out discharge plasma sintering under a vacuum atmosphere, raise the temperature to 1500°C at 100°C / min, keep it warm for 5min, press at 40MPa, and cool naturally to obtain ZrB 2 -SiC-ZrSi 2 Ceramic composite materials, SiC and ZrSi in the material 2 The theoretical mass percentage content of is 20wt%.

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

Embodiment 2

[0027] Weigh ZrB 2 35g ZrC powder, 8.2588g ZrC powder, and 6.7412g Si powder. Pour all the weighed materials into a ball mill jar, add alcohol and 100g of zirconia balls, and mix the materials on a ball mill at 150 rpm for 4 hours. After the ball-milled material is filtered, it is placed in a vacuum drying oven for drying, and after drying, it is sieved 3 times to obtain a mixed raw material mixture.

[0028]Weigh 25g of the above-mentioned mixed raw material mixture, put it into a graphite mold with a diameter of 30mm, carry out discharge plasma sintering under vacuum atmosphere, raise the temperature to 1500°C at 100°C / min, keep the temperature for 10min, and press 30MPa, and then naturally cool to obtain ZrB 2 -SiC-ZrSi 2 Ceramic composites, SiC and ZrSi in materials 2 The theoretical mass percentage content of is 30wt%.

[0029] figure 1 The ZBZSS30 pattern in the middle is the XRD pattern of the sintered sample. It can be seen from the figure that except for the ZrB ...

Embodiment 3

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

[0032] Weigh 25g of the above-mentioned mixed raw material mixture, put it into a graphite mold with a diameter of 30mm, carry out discharge plasma sintering under a vacuum atmosphere, heat up to 1500°C at 100°C / min, keep it warm for 15min, and press 20MPa. After natural cooling, the Get ZrB 2 -SiC-ZrSi 2 Ceramic composites, SiC and ZrSi in materials 2 The theoretical mass percentage content of is 40wt%.

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

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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, in particular to a sintering method of zirconium diboride ceramic material. Background technique [0002] With the rapid development of aerospace and national defense, modern aircraft (such as hypersonic aircraft, missiles, space shuttles, etc.) Requirements: Be able to adapt to some extreme environments such as supersonic cruise flight, atmospheric reentry, transatmospheric long-duration flight and rocket propulsion. 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 national defense. [0003] ZrB 2 It has the advantages of high melting point (3245°C), high strength, high hardness, good electrical and thermal conductivity, and good corrosion resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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