Method for manufacturing gradient composite of W-Cu system by aid of tape casting process

A composite material and technology of casting method, applied in the field of preparing W-Cu system gradient composite materials by casting method, can solve the problem of less metal system gradient composite materials, and achieve continuous controllable components, low cost and easy control. Effect

Active Publication Date: 2013-09-25
WUHAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0007] Li Jun of Wuhan University of Technology prepared a 5-component Mg-Cu system density gradient material from 100% Mg to 100% Cu by tape casting technology; Chi Chen of Wuhan University of Technology prepared a medium viscosity, solid phase material by tape casting technology The W-Cu system with high content is non-water-based casting diaphragm, but there are still relatively few research materials and data on the process parameters of preparing metal system gradient composite materials by casting method at home and abroad.

Method used

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  • Method for manufacturing gradient composite of W-Cu system by aid of tape casting process
  • Method for manufacturing gradient composite of W-Cu system by aid of tape casting process
  • Method for manufacturing gradient composite of W-Cu system by aid of tape casting process

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Effect test

Embodiment 1

[0034] Such as figure 1 Shown, the preparation method of W-Cu system gradient composite material, it comprises the steps:

[0035]1) Preparation of casting slurry: the mass percentage of each raw material is: the solid phase content of Cu powder with a particle size of 10 μm is 60%, the dispersant Hypermer KD-11%, the binder polyvinyl butyral 3 %, plasticizer glycerin 3.2%, solvent 32.8%; solvent, dispersant Hypermer KD-1, Cu powder, binder and plasticizer are put into nylon ball mill jar, with agate ball as ball mill medium, ball-to-material ratio 1:1, ball milling and mixing on a ball mill for 24 hours to obtain a mixed slurry; the mixed slurry after ball milling was degassed (vacuum filtration using a small defoaming machine), and filtered to obtain pure Cu powder non-aqueous base tape casting slurry, its rheological properties are as follows figure 2 As shown, the viscosity basically does not change with the rotation speed, indicating that the slurry has good stability ...

Embodiment 2

[0041] Such as figure 1 Shown, the preparation method of W-Cu system gradient composite material, it comprises the steps:

[0042] 1) Preparation of casting slurry: the mass percentage of each raw material is: the solid phase content of copper powder with a particle size of 10 μm is 60%, the dispersant Hypermer KD-11%, the binder polyvinyl butyral 3 %, plasticizer glycerin 3.2%, solvent 32.8%; solvent, dispersant Hypermer KD-1, Cu powder, binder and plasticizer are put into nylon ball mill jar, with agate ball as ball mill medium, ball-to-material ratio 1:1, ball milling and mixing on a ball mill for 24 hours to obtain a mixed slurry; the mixed slurry after ball milling was degassed (vacuum filtration using a small defoaming machine), and filtered to obtain pure Cu powder non-aqueous Base casting slurry.

[0043] 2) Tape casting: inject the pure Cu powder slurry obtained in step 1) into the casting machine, adjust the height of the scraper to 0.2mm, and the casting speed to ...

Embodiment 3

[0048] Such as figure 1 Shown, the preparation method of W-Cu system gradient composite material, it comprises the steps:

[0049] 1) Preparation of casting slurry: the mass percentage of each raw material is: the solid phase content of Cu powder with a particle size of 10 μm is 60%, the dispersant Hypermer KD-11%, the binder polyvinyl butyral 3 %, plasticizer glycerin 3.2%, solvent 32.8%; solvent, dispersant Hypermer KD-1, Cu powder, binder and plasticizer are put into nylon ball mill jar, with agate ball as ball mill medium, ball-to-material ratio 1:1, ball milling and mixing on a ball mill for 24 hours to obtain a mixed slurry; the mixed slurry after ball milling was degassed (vacuum filtration using a small defoaming machine), and filtered to obtain pure Cu powder non-aqueous Base casting slurry.

[0050] 2) Tape casting: inject the pure Cu powder slurry obtained in step 1) into the casting machine, adjust the scraper height to 1.0mm, and the casting speed to 1.0m / min, a...

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Abstract

The invention relates to a method for manufacturing a gradient composite of a W-Cu system by the aid of a tape casting process. The method includes steps of (1), manufacturing metal powder non-water-based tape casting slurry and performing tape casting: defoaming and filtering metal powder non-water-based slurry which is mixed by means of ball milling, then performing tape casting on the metal powder non-water-based slurry a tape casting machine, and drying the metal powder non-water-based slurry in air to obtain a single-component metal tape casting membrane; (2), designing, cutting and laminating a gradient structure: cutting tape casting diaphragms with different W-Cu components according to a design of a thickness-direction distribution function C=C<0>+AXx of copper contents, and laminating the cut tape casting diaphragms to form a green body with the gradient structure; (3), removing adhesive of the green body and performing hot pressed sintering: removing the adhesive of the green body in nitrogen and hydrogen mixed atmosphere, and then performing hot pressed sintering on the green body in a vacuum hot press furnace. The method has the advantages that a technology is simple, the cost is low, the thickness of a single-component layer of the composite manufactured by the method can reach a micron dimension, variation of a component is gentle, a transitional layer is smooth and continuous, and the gradient composite is excellent in electro-thermal performance and can be applied to the thermoelectric fields of electric contacts, electronic packaging and the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing a W-Cu system gradient composite material by a casting method. Background technique [0002] Tape casting, also known as belt casting method and scraper method, is an ancient molding method, which was first proposed by Glenn N. Howatt and applied in the field of ceramic molding, and was patented in 1952. In the past ten years, great progress has been made in the application research of tape casting technology. Tape casting has become a pillar technology for the production of multilayer capacitors and multilayer ceramic substrates, and is also a necessary technology for the production of electronic components: such as using Al 2 o 3 Various thicknesses of integrated circuit substrates and pad materials are produced; BaTiO 3 Made of capacitor dielectric material; use ZrO 2 Made of solid oxide fuel cells, oxygen pumps and oxygen sensors. It is a relatively mature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/02
Inventor 张联盟周小状余侃沈强罗国强李美娟王传彬刘树龙
Owner WUHAN UNIV OF TECH
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