Preparation method of layered ternary ceramic reinforced copper composite material

Abstract

The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method of a layered ternary ceramic reinforced copper composite material. According to the preparation method, the reinforced effect of a strengthening phase can be fully exerted and the synergistic effect of a substrate and the strengthening phase are also fully exerted, so that the conductivity of the material is well matched with the strength of the substrate. The preparation method comprises the following steps: (1) carrying out ball-milling and mixing on 2wt%-45wt% of layered ternary metal ceramic powder and remained copper powder in a ball mill; (2) carrying out mould pressing on the mixed powder obtained in the step (1) so as to form a blocky green body; and (3) at the hydrogen or noble gas atmosphere, warming up the blocky green body to 800 DEG C-1250 DEG C at the warming speed rate of 20-40 DEG C / min, insulating for 0.5-3 hours, and cooling so as to obtain the layered ternary ceramic reinforced copper composite material.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, in particular to a method for preparing a layered ternary ceramic reinforced metal-copper composite material. Background technique [0002] m n+1 AX n In the ternary compound system of phase, M is a transition element, A is some elements in the main group III and IV, X is C or N, and n=1,2,3. According to the different values ​​of n, it is customary to use M with n=1, 2 or 3 n+1 AX n Phase compounds are referred to as 211 phase, 312 phase or 413 phase, respectively. all M n+1 AX n Phase compounds have the same layered hexagonal crystal structure. Their atomic bonding methods include covalent bonds, ionic bonds and metal bonds, so they have the properties of both metals and ceramics, such as thermal conductivity, electrical conductivity, thermal shock resistance and machinability similar to metals, and oxidation resistance similar to ceramics. Resistance, wear resistance, self-lu...

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Problems solved by technology

Generally, there are two ways of strengthening copper: one is solid solution strengthening, but because the metal will undergo recrystallization, second phase coarsening and dissolution at high temperatures, conventional methods such as work hardening and precipitation hardening are difficult to work, solid solution Strengthening will greatly reduce the conductivity of the material; the second is to introduce a second phase to strengthen and form a copper-based composite material. The design principle is to select an appropriate reinforcing phase (one or more) according to the requirements of material performance. While the copper matrix has high conductivity, the reinforcement effect of the strengthening phase and the synergistic effect of the two are fully utilized, so that the conductivity of the material and the strength of the matrix are well matched.