High-thermal-conductivity low-expansion ultrathin diamond-metal-based composite material as well as preparation method and application thereof

• Main Authors: MA LI, HUANG KAITANG, LI JUN, ZHOU KECHAO, WEI QIUPING
• Format: Patent
• Language: Chinese; English
• Published: 14.12.2021
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SEMICONDUCTOR DEVICES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a high-thermal-conductivity low-expansion ultrathin diamond-metal-based composite material as well as a preparation method and application thereof. The high-thermal-conductivity diamond/metal-based composite material comprises core-shell structure doped diamond and a metal-based material, wherein the core-shell structure doped diamond comprises diamond and a diamond surface modification layer; the diamond surface modification layer sequentially comprises a diamond transition layer and a doped diamond shell layer from inside to outside; and the thickness of the diamond-metal-based composite material is 0.1-1 mm. The preparation method comprises the following steps: by adopting a gas pressure assisted infiltration process technology, taking high-purity gas as a pressure source, and acting on the molten liquid metal-based surface, thereby implementing high-density compounding of the diamond and metal-based material. The high-thermal-conductivity low-expansion ultrathin diamond-metal-based