A method for preparing diamond/aluminum composite material by liquid-solid separation
A technology of aluminum composite materials and diamond, which is applied in the field of high thermal conductivity diamond/aluminum composite materials, can solve the problems of difficult popularization and application and high manufacturing cost, and achieve the effect of increasing compactness and improving thermal conductivity
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specific Embodiment approach 1
[0045] use figure 1 The liquid-solid separation system shown prepares a diamond / aluminum composite material with a diamond content of 30-70vol.%.
[0046] The diamond particles and the metal aluminum powder are mixed in a certain ratio (1:9-3:7) and mechanically mixed in a planetary ball mill for a mixing time of 1-48 hours to make a mixed powder.
[0047] The mixed powder is put into a cold-pressing mold, placed in a press and held at a pressure of 50-300MPa for 0.5-5 minutes to make a cold-pressed billet of a certain size.
[0048] The cold-pressed billet is directly placed in a special mold system with a liquid-solid separation channel. 2 Heating to 640-720° C. for 10-60 minutes under atmosphere protection conditions to prepare a liquid-solid mixed molten slurry in which diamond solid phase particles and liquid metal aluminum coexist.
[0049] The liquid-solid mixed molten slurry passes through the liquid-solid separation channel with a gap of 0.5-5mm in width, and under ...
specific Embodiment approach 2
[0052] This embodiment is different from the specific embodiment one in that:
[0053] Diamond particles and metallic aluminum powder are mechanically mixed in a 3D mixer.
[0054] The cold-pressed billet is heated under an inert gas protection atmosphere to prepare a liquid-solid mixed molten slurry.
[0055] The liquid-solid separation channel is a circular hole with a diameter of 0.5-5mm.
[0056] The layer-by-layer solidification of the composite material is realized by forced cooling with an external cold iron.
specific Embodiment approach 3
[0058] This embodiment is different from the specific embodiment one in that:
[0059] The cold-pressed billet is placed in the pass with H 2 After being heated to a liquid-solid mixed molten state in an atmosphere-protected heating furnace, it is transferred to a special mold system with a liquid-solid separation channel.
[0060] The layer-by-layer solidification of the composite material is achieved by forced air cooling.
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