Preparation method of tungsten-plated SiC particle reinforced copper-based composite material used for electronic packaging
A copper-based composite material, particle-reinforced technology, applied in the manufacture of circuits, electrical components, semiconductor/solid-state devices, etc., can solve the problems of poor interface wettability and performance degradation of SiC/Cu materials, and achieve good mechanical strength and thermal expansion coefficient. The effect of reducing and simple process operation
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[0018] Example 1
[0019] A copper-based composite material containing 50% tungsten-plated SiC particles and 0.5% added elements with a thickness of 0.5 mm was prepared.
[0020] 1. The composition and volume percentage of the raw materials are: 50% of tungsten-plated SiC particles (50μm in size), 0.5% of elemental Ni powder, and 49.5% of Cu matrix. In the Cu matrix, Cu metal powder is 20% of the total volume of the raw material, and the rest is Cu metal block (49.5%-20%=29.5%).
[0021] 2. Mix Cu metal powder, additive element powder and tungsten-plated SiC particles, the mixing time is 1 hour, and the mixing speed is 100 revolutions per minute.
[0022] 3. Press the mixed powder into a blank under a pressure of 50MPa.
[0023] 4. The Cu metal block and the pressed blank are infiltrated in an infiltration furnace; the infiltration temperature is 1100℃, and the infiltration atmosphere is hydrogen atmosphere; the infiltration speed is 5min / mm, and the infiltration time=5min / mm ×0.5mm=2...
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[0025] Example 2
[0026] A copper-based composite material with a thickness of 200 mm containing 70% tungsten-plated SiC particles and 3% added elements was prepared.
[0027] 1. The composition and volume percentage of the raw materials are: 70% of tungsten-plated SiC particles (grain size of 1μm), 3% of Fe powder and 27% of Cu matrix. In the Cu matrix, Cu metal powder is 10% of the total volume percentage of the raw material, and the rest is Cu metal block (27%-10%=17%).
[0028] 2. Mix Cu metal powder, additive element powder and tungsten-plated SiC particles, the mixing time is 20 hours, and the mixing speed is 30 rpm.
[0029] 3. Press the mixed powder into a blank under a pressure of 150MPa.
[0030] 4. The Cu metal block and the press-formed blank are infiltrated in an infiltration furnace; the infiltration temperature is 1350℃, the infiltration atmosphere is hydrogen atmosphere; the infiltration rate is 2min / mm, and the infiltration time=2min / mm ×200mm=400 minutes.
[0031] 5....
Example Embodiment
[0032] Example 3
[0033] A copper-based composite material containing 60% tungsten-plated SiC particles and 1% additive elements with a thickness of 0.5 mm was prepared.
[0034] 1. The composition and volume percentage of the raw materials are: 60% of tungsten-plated SiC particles (30μm in size), 1% of Co powder added, and 39% of Cu matrix. In the Cu matrix, Cu metal powder is 15% of the total volume of the raw material, and the rest is Cu metal block (39%-15%=24%).
[0035] 2. Mix Cu metal powder, additive element powder and tungsten-plated SiC particles. The mixing time is 15 hours and the mixing speed is 50 revolutions per minute.
[0036] 3. Press the mixed powder into a blank under a pressure of 100MPa.
[0037] 4. The Cu metal block and the pressed blank are infiltrated in an infiltration furnace; the infiltration temperature is 1300℃, the infiltration atmosphere is hydrogen atmosphere; the infiltration speed is 4min / mm, and the infiltration time=4min / mm ×0.5mm=2 minutes.
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