A Method of Connecting Graphite and Molybdenum Using Thermal Diffusion Technology

A technology of thermal diffusion and technology, which is applied in the field of connecting graphite and molybdenum by thermal diffusion technology, can solve the problems of complex process and difficult control of connection parameters, and achieve the effects of simple preparation process, saving precious metal resources, and high bonding strength

Inactive Publication Date: 2017-11-28
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for connecting graphite and molybdenum using thermal diffusion technology, which solves the problems of difficult control of connection parameters and complicated process existing in the existing connection method

Method used

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  • A Method of Connecting Graphite and Molybdenum Using Thermal Diffusion Technology

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Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a molybdenum and graphite composite connector with a cylindrical structure was prepared, wherein the size of the composite connector was 15 mm in diameter and 15 mm in height. Select graphite block and pure molybdenum; perform surface pretreatment on the surface of graphite block 1 and molybdenum sheet 3: use 280, 320 and 400 gauze paper to polish the surface of graphite block 1 and molybdenum sheet 3 in order to remove surface impurities and burrs Finally, clean it with absolute ethanol, and then dry it separately in a blast drying oven at a temperature of 70°C; prepare Ti / Zr solder sheet 2, put Ti powder and Zr powder in a ball mill with a mass ratio of 1:1 and mix for 4 hours , to obtain the mixed powder, then spread the mixed powder in a steel pressing mold, press and form it in one direction on a hydraulic press, press 300MPa, hold the pressure for 1min, and then demould, the thickness of the Ti / Zr brazing filler metal sheet 2 is 1mm; La...

Embodiment 2

[0034] Such as figure 2 As shown, a molybdenum and graphite composite connector with a laminated structure was prepared, wherein the length, width, and height of the composite connector were 15×15×15 mm, respectively. Select graphite block and molybdenum-boron alloy; carry out surface pretreatment on the surface of graphite block 1 and molybdenum sheet 3: use 280, 320 and 400 gauze papers to polish the surfaces of graphite block 1 and molybdenum sheet 3 in turn to remove surface impurities and After the burr, clean it with absolute ethanol, and then dry it separately in a blast drying oven with a temperature of 75°C; prepare Ti / Zr solder sheet 2, put Ti powder and Zr powder in a ball mill at a mass ratio of 1:1 and mix them 5h, the mixed powder was obtained, and then the mixed powder was flatly spread in a steel pressing mold, and unidirectionally pressed and formed on a hydraulic press, the pressure was 330MPa, the pressure was maintained for 1min, and then demolded, and the...

Embodiment 3

[0036] A cylindrical molybdenum and graphite composite connector was prepared, wherein the size of the composite connector was 10 mm in diameter and 13 mm in height. Select graphite block and tungsten-molybdenum alloy; carry out surface pretreatment on the surface of graphite block 1 and molybdenum sheet 3: use 280, 320 and 400 gauze paper to polish the surfaces of graphite block 1 and molybdenum sheet 3 in turn to remove surface impurities and After the burr, clean it with absolute ethanol, and then dry it separately in a blast drying oven with a temperature of 80°C; prepare Ti / Zr solder sheet 2, put Ti powder and Zr powder in a ball mill at a mass ratio of 1:1 and mix them 5h, the mixed powder was obtained, and then the mixed powder was flatly spread in a steel pressing mold, and unidirectionally pressed and formed on a hydraulic press, the pressure was 350MPa, the pressure was maintained for 1min, and then demolded, and the thickness of the Ti / Zr brazing filler metal sheet 2...

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Abstract

The invention discloses a method for connecting graphite and molybdenum by using thermal diffusion technology, comprising the following steps: selecting graphite blocks and molybdenum sheets according to the technical requirements for connecting graphite and molybdenum, and pretreating the surfaces of the graphite blocks and molybdenum sheets, Prepare Ti / Zr brazing filler metal flakes, lay graphite block, Ti / Zr brazing filler metal flakes and molybdenum flakes sequentially from top to bottom and put them into the vacuum melting furnace, turn on the vacuum melting furnace, pass in argon gas for thermal diffusion connection, and complete graphite Connection of block to molybdenum sheet. The invention can effectively and stably connect metal molybdenum and graphite together, the bonding strength is not lower than the graphite matrix strength, and at the same time, it does not crack when serving at high temperature, and has the advantages of stable comprehensive performance, high bonding strength, and no cracking when serving at high temperature, reducing the The production cost saves precious metal resources, not only prolongs the service life of molybdenum / graphite composite products, but also has simple preparation process, convenient operation and low cost, further improving domestic medical CT alloy targets.

Description

technical field [0001] The invention belongs to the technical field of connection of heterogeneous materials, and in particular relates to a method for connecting graphite and molybdenum by thermal diffusion technology. Background technique [0002] With the continuous development and innovation of technical equipment, the requirements for the connection of dissimilar materials in various fields are increasing, and the connection technology of dissimilar materials is also constantly promoted. The connection of dissimilar materials is to make two or several different materials connect according to certain preparation process and service conditions to form an organic whole with comprehensive performance. Due to the particularity of its structure and preparation process, graphite materials have various excellent properties, including low density, good electrical and thermal conductivity, excellent thermal shock resistance, high sublimation temperature, high temperature strength...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/64
Inventor 陈文革侯林涛
Owner XIAN UNIV OF TECH
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