Preparation method for Al2O3 hollow sphere/aluminum porous composite material
A technology of porous composite materials and hollow spheres is applied in the field of preparation of aluminum-based porous composite materials, which can solve the problems of high cost, harsh process conditions, low strength and the like, and achieve the effects of convenient operation, improved mechanical properties and low cost.
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specific Embodiment approach 1
[0024] Specific implementation mode one: combine figure 1 As shown, this embodiment Al 2 o 3 The preparation method of the hollow sphere / aluminum porous composite material is realized according to the following steps:
[0025] 1. Al 2 o 3 Hollow sphere filling: Al 2 o 3 Hollow balls are loaded into the mold cavity 3 to prepare prefabricated blocks;
[0026] 2. Preheating: heat the mold with the prefabricated blocks to 400-600°C in the electric furnace 5 for preheating;
[0027] 3. Pouring: the matrix is heated in another electric furnace until it melts, and the metal liquid is obtained and poured into the mold cavity 2;
[0028] 4. Pressurized impregnation: use the pressure head 1 to apply a pressure of 20-40 MPa to the metal liquid in the casting cavity 2;
[0029] 5. Pressure holding and cooling: After the metal liquid is completely infiltrated, keep the pressure until it cools naturally, demould, take out the ingot material, and the Al 2 o 3 Preparation of hollo...
specific Embodiment approach 2
[0032] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, Al with a particle size of 0.5 mm and an inner cavity diameter of 0.4 2 o 3 The hollow balls are loaded into the mold cavity 3 to prepare a prefabricated block. Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step one, Al with a particle size of 1.2 mm and an inner cavity diameter of 1.0 mm 2 o 3 The hollow balls are loaded into the mold cavity 3 to prepare a prefabricated block. Other steps and parameters are the same as those in Embodiment 1.
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