Graphite film-Ti layered block composite material for thermal management and preparation method thereof

The invention discloses a graphite film-Ti layered block composite material for thermal management and a preparation method thereof. The composite material is composed of, by volume percentage, 12.5-80.6% of a Ti metal phase and 19.4-87.5% of a graphite phase, wherein the graphite film and metal Ti are alternately distributed layer by layer in the composite material, present perfect orientation arrangement, and have good interface bonding. The preparation method includes the five steps of: graphite film surface pretreatment, Ti foil surface pretreatment, cutting of the graphite film and Ti foil, layer-by-layer stacking and pre-pressing shaping, and hot pressed sintering. The graphite film-Ti layered block composite material prepared by the method provided by the invention not only has highthermal conductivity in the parallel layered direction, but also can acquire a thermal expansion coefficient matching the electronic components/devices requiring heat dissipation in the vertical layered direction, and at the