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A kind of method for preparing w-cu system gradient composite material by casting method

A technology of composite materials and tape casting method, which is applied in the field of preparation of W-Cu system gradient composite materials by tape casting method, can solve the problem of few gradient composite materials in metal system, achieve continuous controllability of components, good electrothermal properties, and production high efficiency effect

Active Publication Date: 2015-09-30
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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  • A kind of method for preparing w-cu system gradient composite material by casting method
  • A kind of method for preparing w-cu system gradient composite material by casting method
  • A kind of method for preparing w-cu system gradient composite material by casting method

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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-1 is 1%, the binder polyvinyl butyral 3%, plasticizer glycerin 3.2%, methyl ethyl ketone 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, The ball-to-material ratio is 1:1, and the ball mill is mixed for 24 hours on a ball mill to obtain a mixed slurry; after the ball-milled mixed slurry is degassed (use a small defoamer for vacuum filtration) and filtered, the pure Cu can be obtained Powder non-water-based casting slurry, its rheological properties are as follows figure 2 As shown, the viscosity basically does not change with the rotation speed, indicating that th...

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-1 is 1%, the binder polyvinyl butyral 3%, plasticizer glycerin 3.2%, methyl ethyl ketone 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, The ball-to-material ratio is 1:1, and the ball mill is mixed for 24 hours on a ball mill to obtain a mixed slurry; after the ball-milled mixed slurry is degassed (use a small defoamer for vacuum filtration) and filtered, the pure Cu can be obtained Powder non-water-based 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...

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-1 is 1%, the binder polyvinyl butyral 3%, plasticizer glycerin 3.2%, methyl ethyl ketone 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, The ball-to-material ratio is 1:1, and the ball mill is mixed for 24 hours on a ball mill to obtain a mixed slurry; after the ball-milled mixed slurry is degassed (use a small defoamer for vacuum filtration) and filtered, the pure Cu can be obtained Powder non-water-based 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...

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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 Patents(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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