Research progress of high performance copper matrix composites
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摘要: 铜和铜合金凭借其高导电性、导热性、易加工性和耐腐蚀等特性被广泛应用于电接触材料、电子封装材料、热交换材料等领域,然而铜合金强化过程中强度和电导率、热导率之间此消彼长的矛盾使其发展受限。铜基复合材料可通过强化相提升材料的强度,并且可避免对铜基体产生严重晶格畸变,最大化保证材料的电导率,从而获得优异强阻比的材料,因此铜基复合材料是高性能铜材的一个重要发展方向。本文概述了高性能铜基复合材料的主要制备方法,总结了复合材料增强相及其特点和发展方向。阐述了主要研究进展及其在轨道交通、电工电子、军工方面的应用现状,并对该材料未来的发展方向进行了展望,为高性能铜基复合材料的研究和应用提供参考。Abstract: Copper and copper alloys are widely used in electrical contact materials, electronic packaging materials, heat exchange materials and other fields because of their high electrical conductivity, thermal conductivity, easy machinability and corrosion resistance. However, the contradiction between strength, electrical conductivity and thermal conductivity in copper alloys limits its development. Copper matrix composites can improve the strength of materials by strengthening phase, avoid serious lattice distortion to copper matrix, and maximize the conductivity of materials, thus obtaining materials with excellent strength-resistance ratio. Therefore, copper matrix composites are an important development direction of high performance copper materials. In this paper, the main preparation methods of high performance copper matrix composites are summarized, and the reinforcing phase of composites, its characteristics and development direction are summarized. The main research progress and its application status in rail transit, electrics and electronics, military industry are described, and the future development direction of this material is prospected, which provides reference for the research and application of high performance copper matrix composites.
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表 1 碳材料增强铜基复合材料的性能对比
Table 1. Performance comparison of carbon reinforced copper matrix composites
Reinforcement Pretreatment and molding methods Ω/(%IACS) Rm/MPa HV K1/(W·m−1·K−1) Ref. Carbon Powder metallurgy 8.2 127 71 — [14] Carbon Hot-press sintering — 567 89 — [15] Carbon Powder metallurgy — 354.8 228 — [16] Graphene CVD 120 — — 130 [17] Graphene CVD + deformation 98 595 — — [18] Graphene Ball mill and SPS 94 — 62.9 — [6] Graphene MLM process and SPS 88 320 178 — [19] Carbon nanotubes Copper facing and SPS 73.0 341.2 110 — [20] Carbon nanotubes Ball mill and SPS 71.0 225 104.5 — [21] Carbon nanotubes MLM and SPS — 455 — — [22] Single-walled carbon nanotubes Electrolytic codeposition 141 700 — 385 [23] Diamond Composite electroplating — — — 846 [24] Diamond Pulse plasma sintering — — — 690 [25] Carbon fibre Electrodeposition and vacuum hot pressing — 586 84 — [26] Carbon fibre Electroplating and vacuum sintering 97.1 — 50.6 — [27] Carbon fibre CVD — — 31.6 67 [28] Notes: Ω—Electrical conductivity; Rm—Tensile strength; HV—Hardness; K1—Thermal conductivity; SPS—Spark plasma sintering; CVD—Chemical vapor deposition; MLM—Molecular level mixing; IACS—International annealed copper standard. 表 2 铜基复合材料颗粒增强相参数
Table 2. Particle reinforced phase parameters of copper matrix composites
Reinforcement K2/(g·cm−3) ρ/(10−6 Ω·m) Melting point/K K1/(W·cm−1·K−1) CTE/(10−6 K) E/GPa Al2O3 3.67 >1012 2 323 1.59 7.92 380 SiC 3.21 0.1 2 700 1 4.4 480 WC 15.63 0.19 2 993 3.2 5.09 669 TiB2 4.5 0.9 3 498 6.6 8.28 514 TiN 5.21 0.217 2 950 29.1 9.35 350 TiC 4.93 0.6 3 420 1.71 7.6 269 TaC 14.3 0.3~0.4 4 150 0.21 6.46 366 Notes: K2—Densification; ρ—Resistivity; CTE—Coefficient of thermal expansion; E—Elastic modulus. -
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