Preparation of a Dense Bulk Composite Material of Mutually Insoluble Metal Tantalum-Silver Matrix
A composite material, mutually insoluble technology, applied in the field of preparation of mutually insoluble metal composite materials, can solve the problems of insufficient matrix strength and complex process, and achieve the effect of simple production process and efficient production
Inactive Publication Date: 2016-04-20
TIANJIN UNIV
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Problems solved by technology
However, due to a large amount of silver overflow, the middle layer is composed of most of Mo and a small amount of Ag, resulting in insufficient strength of the matrix, which is a big shortcoming in application and the process is complicated
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[0024] The preparation of a dense bulk composite material of mutually insoluble metal tantalum-silver matrix in the present invention mainly includes: uniformly mixing mutually insoluble metal powders in proportion, pressing the billet and preparing it by a powder liquid phase sintering method to obtain The structure of the bulk composite material is that part of the liquid-phase silver in the matrix surrounds the tantalum particles, and at the same time, the liquid-phase silver penetrates into the gaps of the tantalum skeleton, and the tensile strength of the composite material is greater than 304Mpa.
[0025] A detailed description will be made below in conjunction with the embodiments and accompanying drawings. For the experimental methods that do not specify specific conditions in the examples, usually follow the conventional conditions and the conditions described in the manual, or follow the conditions suggested by the manufacturer's instructions.
[0026] The dense bulk...
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Abstract
The invention discloses a method for preparing a blocky composite material with a compact host made of tantalum and silver free of mutual solid solution. The structure of the composite material is that tantalum particles are surrounded by part of liquid-phase silver in the host, and meanwhile, liquid-phase silver permeates through gaps in a tantalum framework. The tensile strength of the composite material is higher than 304 Mpa. The preparation method comprises the steps of (1) weighing pure tantalum powder and pure silver powder with a molar ratio of 1:1 and mixing the two kinds of powder, (2) stirring the mixed powder in a ball mill and ensuring that the powder is evenly mixed, (3) conducting film pressing on the evenly mixed powder to form a block, and (4) sintering the blank at a temperature slightly lower than the melting temperature of silver to obtain the tantalum-silver blocky composite material with the tensile strength higher than 304 Mpa finally. The production technology is simple, and effective production can be achieved easily. The method is not only suitable for preparation of the blocky composite material made of tantalum and silver free of mutual solid solution, but also suitable for preparation of blocky composite materials made of other metal free of mutual solid solution, such as molybdenum-copper, tungsten-silver and niobium-aluminum.
Description
technical field [0001] The invention relates to the preparation of a mutual non-solid solution metal composite material, in particular, a novel high-strength mutual non-solid solution metal composite material is prepared by adopting a powder liquid phase sintering method by controlling process parameters and raw material ratios. Background technique [0002] A single material cannot meet the needs of production and application in many fields due to its singleness and limitation of performance. As the focus of material development, composite materials have been deeply studied. However, with the rapid development of various composite materials, the direct connection / recombination of mutually insoluble metals has become a major problem in the preparation of composite materials. Due to their different crystal structures, positive heat of reaction, non-wetability, and huge differences in other physical and chemical properties, mutual insoluble metals cannot connect / recombine smoo...
Claims
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IPC IPC(8): C22C1/04C22C27/02
Inventor 黄远程明月何芳王玉林
Owner TIANJIN UNIV