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A ceramic/metal gradient structure high-temperature packaging material and its preparation method

A technology of packaging materials and gradient structures, which is applied in the field of sealing materials to achieve the effects of long-term high-temperature insulation and sealing, strong high-temperature stability, and high mechanical strength of equipment

Active Publication Date: 2020-01-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a ceramic / metal gradient structure high-temperature packaging material with strong high-temperature stability, corrosion resistance and insulation sealing performance and its preparation for extremely complex working environments such as ultra-high temperature and strong corrosion method

Method used

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  • A ceramic/metal gradient structure high-temperature packaging material and its preparation method
  • A ceramic/metal gradient structure high-temperature packaging material and its preparation method
  • A ceramic/metal gradient structure high-temperature packaging material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh an appropriate amount of AlN powder with an average particle size of 2 μm, use a ball mill for 4 hours, and then put it in a drying oven at 80 ° C for 12 hours; :8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2, 9:1 ratios were weighed raw materials, ball milled by ball mill for 2 hours and then placed in a drying oven at 80°C Dry in medium for 12h.

[0035] The ball milling process is as follows: put the raw material powder into a 125ml nylon ball milling tank, according to powder: alcohol: ZrO2 The ratio of balls = 1:1:4 is used for ball milling. The model of the ball mill used is Retsch PM100, and the speed of the ball mill is set at 300 rpm to obtain a mixed powder with a particle size of 0.5-2 μm.

[0036] Mix the powder according to the figure 1 The schematic diagram of the structure of the ceramic / metal gradient composite high-temperature packaging material shown is laid layer by layer into a graphite mold with an inner diameter of 25mm. The amount of the middle ceramic la...

Embodiment 2

[0039] According to AlN powder, BN powder, sintering aid Y 2 o 3 The ratio of mass percentage is 77.6:19.4:3 Weigh an appropriate amount of raw materials, the average particle size of the AlN and BN powder used is 2 μm, use a ball mill for 2 hours and put it in a drying oven at 80 ° C for 12 hours; The mass percentage of powder is 1:9, 2:8, 3:7, etc. up to 9:1. Weigh an appropriate amount of raw materials, use a ball mill for 1 hour, and then put them in a drying oven at 80°C for 12 hours.

[0040] The ball milling process is as follows: put the raw material powder into a 125ml nylon ball milling tank, according to powder: alcohol: ZrO 2 The ratio of balls = 1:1:4 is used for ball milling. The model of the ball mill used is Retsch PM100, and the speed of the ball mill is set at 300 rpm to obtain a mixed powder with a particle size of 0.5-2 μm.

[0041] Mix the powder according to the figure 1 The schematic diagram of the structure of the ceramic / metal gradient composite hig...

Embodiment 3

[0044] According to SiC powder, sintering aid Y 2 o 3 The ratio of mass percentage is 97:3. Weigh an appropriate amount of raw materials. The average particle size of the SiC powder used is 2 μm. It is ball-milled by a ball mill for 2 hours and then dried in a drying oven at 80°C for 12 hours. The mass percentage of W powder and SiC powder is 1:9, 2:8, 3:7, etc. until 9:1, weigh appropriate amount of raw materials respectively, use a ball mill to grind for 1 hour, and then put it in a drying oven at 80°C for 12 hours;

[0045] The ball milling process is as follows: put the raw material powder into a 125ml nylon ball milling tank, according to powder: alcohol: ZrO 2 The ratio of balls = 1:1:4 is used for ball milling. The model of the ball mill used is Retsch PM100, and the speed of the ball mill is set at 300 rpm to obtain a mixed powder with a particle size of 0.5-2 μm.

[0046] Mix the powder according to the figure 1 The schematic diagram of the structure of the ceramic...

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Abstract

The invention relates to a ceramic / metal high-temperature packaging material of a gradient structure. A ceramic material comprises one or a plurality of nitrides (A1N, Si3N4, BN and the like), carbides (SiC, ZrC, TiC and the like) and oxides (Al2O3, SiO2, ZrO2 and the like). A metal material comprises one of high-melting-point metals, such as W, Mo, Ta, Cr and Nb. The preparing method of the material comprises the following steps: fully mixing required metal and ceramic powder according to designed gradient components, gradient layer number and the content of each component in each layer so asto obtain required raw materials for each gradient layer; stacking all layers and carrying out pressing forming; enabling the mass percent of ceramic powder to symmetrically and continuously vary ina gradient manner between 100 % and 0 % from the inner side to the outer side in the axial direction; utilizing a powder metallurgy and hot pressing co-firing technology, and finally obtaining the ceramic / metal high-temperature packaging material of the gradient structure. The helium leakage rate is smaller than 1x10<-11> Pa.m<3> / s, the bending strength is larger than 200Mpa, and the electric resistivity is larger than 6x10<9> omega.cm.

Description

technical field [0001] The invention belongs to the field of sealing materials, in particular to a high-temperature packaging material with a ceramic / metal gradient structure and a preparation method thereof. [0002] technical background [0003] Sealing technology is widely used in high-tech fields such as aerospace and nuclear power generation, as well as basic industrial fields such as petroleum and chemical industry. The research and development of many machinery and equipment depends on sealing technology, which directly determines the safety and reliability of machinery and equipment operation. and durability. At present, the level of sealing technology in our country is far from meeting the needs of production development, and the leakage problem in some key occasions has not been completely solved, so the sealing technology needs to be further studied. The literature shows that the current high-temperature sealing technologies in various industries mainly include th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/02B22F3/14C22C1/10C22C1/05
CPCB22F3/14B22F7/02B22F2003/145B22F2998/10C22C1/05B22F1/0003B22F3/02
Inventor 陈斐贾明勇吴玥奇李耘字黄梅沈强张联盟
Owner WUHAN UNIV OF TECH
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