Process for preparing inter-insoluble metal layered composites by powder sintering and infiltration
A technology of mutual insolubility and composite materials, which is applied in the field of preparation of mutual insolubility metal layered composite materials based on powder sintering and infiltration method, can solve the problems of inability to prepare hierarchical layered composite materials, and achieve easy and efficient production , The effect of simple production process
Inactive Publication Date: 2015-09-02
TIANJIN UNIV
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Problems solved by technology
The composite material obtained by this method does not diffuse on the metal interface to form a metallurgical bond, and it is impossible to prepare a layered composite material with a clear hierarchical structure.
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[0040] The present invention is described in detail in combination with embodiments and accompanying drawings. For the experimental methods that do not specify specific conditions in the examples, generally follow the conventional conditions and the conditions described in the manual, or follow the conditions suggested by the manufacturer's instructions.
[0041] attached Figure 6 is a schematic diagram of the structure of silver / molybdenum-silver sintered body / silver layered metal matrix composite material, in which, 1-molybdenum-silver sintered matrix has a thickness of 1.5 mm, and 2-silver surface layer has a thickness of 30 μm.
[0042] The specific implementation steps are as follows:
[0043] 1) Use an electronic balance to weigh 3.000g of 300 mesh (8.47μm) pure molybdenum powder (purity is 99.99%). See the attached figure 1 , weigh 3.000g of 300 mesh (8.47μm) pure silver powder (purity is 99.99%), the microscopic morphology of silver powder is shown in the attached...
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Abstract
The invention relates to a process for preparing metal laminar composite materials not capable of being fused in the solid state through a powder sintering infiltration method. The process includes the steps of taking a molybdenum-silver metal system as an example, conducting ball-milling processing on two types of metal powder not capable of being fused in the solid state in proportion so that particles of the two types of powder can be evenly mixed at the nanometer level, then, conducting pressing to form a powder film, conducting protective atmosphere sintering on the powder film at the temperature close to the melting point of the type of metal with the lower melting point, and finally preparing the metal laminar composite materials. A composite material structurally comprises a low-melting-point metal surface, a sintering substrate with the evenly-mixed two types of metal powder, and a low-melting-point metal surface layer. Each obtained laminar composite material structurally comprises a silver surface layer, a molybdenum-silver sintering substrate and a silver surface layer, and the ultimate tensile strength is 58.3MPa. The production process is simple, and efficient production can be easily achieved.
Description
technical field [0001] The invention relates to the preparation of a layered composite material of mutually insoluble metals, in particular to a process for preparing layered composite materials of mutually insoluble metals based on a powder sintering and infiltration method. Background technique [0002] Layered composite materials have a wide range of applications in industrial fields. At present, the preparation methods of layered metal composites mainly include coating method and coating method, and some other methods include mechanothermochemical method, oxide co-reduction method, sol-gel method and so on. However, these preparation methods are basically based on mutual solid solution alloy systems, using heating to promote diffusion between atoms to form an interface layer to prepare layered metal matrix composites, and the heat of formation between mutually insoluble metals is positive , it is difficult to achieve alloying by diffusion, and the above method is not a...
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IPC IPC(8): B22F7/02
Inventor 黄远潘光军何芳王玉林
Owner TIANJIN UNIV