Raw material mixing method, preparation process and product of molybdenum-copper alloy for heat sink

Abstract

The invention provides a raw material mixing method for a molybdenum copper alloy for heat sinking. Raw materials of an alloy material for heat sinking comprise copper powder and molybdenum powder. The method is characterized in that the loose specific weight of the molybdenum powder is adjusted firstly, a difference value of the loose specific weight of the molybdenum powder and the loose specific weight of the copper powder is smaller than 0.5 g / cm<3>, and then according to the need of the mixing proportion, the copper powder and the molybdenum powder are mixed uniformly. According to the method, the problems that due to copper powder aggregating in the mixture of the molybdenum powder and the copper powder, in the copper infiltration and sintering process, the copper powder is fused, acopper pool with the large size is formed, and the copper distribution uniformity in the alloy material is influenced are effectively solved, the mixing uniformity of the mixture of the molybdenum andthe copper is improved, and thus the uniformity of the physical performance of the molybdenum copper alloy is improved. The invention further provides a preparation technology for the molybdenum copper alloy for heat sinking, and a product.

Description

technical field [0001] The invention relates to a raw material mixing method of molybdenum-copper alloy for heat sink, which is used for uniform mixing of molybdenum powder and copper powder, and belongs to the field of preparation technology of molybdenum-copper alloy. The invention also relates to a preparation technology of molybdenum-copper alloy for heat sink and products. Background technique [0002] The problem of uneven copper distribution commonly exists in the existing molybdenum-copper alloys for heat sinks, which is generally called "copper pool". It directly leads to the performance deviation of the product, such as copper content, hardness, electrical conductivity, thermal conductivity and thermal expansion coefficient, etc., will all have uneven phenomena. [0003] The production methods of molybdenum-copper alloy for heat sink mainly include: mixed copper method, which is obtained by pressing molybdenum-copper mixed powder and then sintering in liquid phase...

AI Technical Summary

Problems solved by technology

[0007] 2. CN 104762498 A discloses a hot isostatic pressing preparation process for high-density molybdenum-copper alloys, the purpose of which is to solve the problems of low relative density, uneven distribution of components, and large sample size when molybdenum-copper alloys are prepared by existing methods. Small and other defects, which affect the thermal conductivity of materials and the airtightness of devices

[0010] In the above prior art, the copper powder in the molybdenum powder and copper powder mixture is not solved, and the copper powder is melted during copper infiltration and sintering, forming a large copper pool, which affects the uniformity of copper distribution in the alloy material.