A kind of reinforced copper-based composite material and its preparation method and application
A copper-based composite material and composite material technology, applied in the field of reinforced copper-based composite materials and its preparation, can solve the problem of high friction coefficient of high-performance friction materials, low wear and high strength working temperature, and mechanical systems that are difficult to achieve. Low strength and hardness, etc., to achieve excellent thermal shock resistance, strong practical value, and improved wear resistance
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Embodiment 1
[0027] First weigh 7.38g β-Si 3 N 4 Whiskers and 180g of pure copper powder with a median particle size of 40μm were added to 40g of absolute ethanol and ball milled for 3 hours to obtain a uniform and stable precursor slurry; then dried at 50-80°C for 2 hours and sieved. Obtain the composite precursor powder; then add the prepared composite precursor powder into the graphite mold, and carry out vacuum hot pressing sintering: keep it at 900°C for 1 hour, and the sintering pressure is 25MPa; the β-Si 3 N 4 Reinforced copper matrix composites with whiskers accounting for 10% by volume.
[0028] The friction performance test data of the reinforced copper-based composite material obtained in this embodiment is shown in Table 1, and the test data of the flexural strength and Rockwell hardness of the composite material are shown in Table 2; the fracture shape of the composite material Seemingly Figure 4 As shown in the picture a; the thermal conductivity-temperature curve of th...
Embodiment 2
[0033] First weigh 14.76g β-Si 3 N 4 Whiskers and 160g of pure copper powder with a median particle size of 40μm were added to 35g of absolute ethanol and ball milled for 3 hours to obtain a uniform and stable precursor slurry; then dried at 50-80°C for 2 hours and sieved. Obtain the composite precursor powder; then add the prepared composite precursor powder into the graphite mold, and carry out vacuum hot pressing sintering: keep it at 900°C for 1 hour, and the sintering pressure is 25MPa; the β-Si 3 N 4 Reinforced copper matrix composites with whiskers accounting for 20% by volume.
[0034] The friction performance test data of the reinforced copper-based composite material obtained in this embodiment is shown in Table 1, and the test data of the flexural strength and Rockwell hardness of the composite material are shown in Table 2; the fracture shape of the composite material Seemingly Figure 4 Shown in picture b in ; the thermal conductivity-temperature curve of the co...
Embodiment 3
[0036] First weigh 7.38g β-Si 3 N 4 Whiskers and 180g of pure copper powder with a median particle size of 40μm were added to 40g of absolute ethanol and ball milled for 3 hours to obtain a uniform and stable precursor slurry; then dried at 50-80°C for 2 hours and sieved. Obtain the composite precursor powder; then add the prepared composite precursor powder into the graphite mold, and carry out vacuum hot pressing sintering: keep it at 950°C for 1 hour, and the sintering pressure is 25MPa; the β-Si 3 N 4 Reinforced copper matrix composites with whiskers accounting for 10% by volume.
[0037] The friction performance test data of the reinforced copper-based composite material obtained in this embodiment is shown in Table 1, and the test data of the flexural strength and Rockwell hardness of the composite material are shown in Table 2; the fracture shape of the composite material Seemingly Figure 4 Shown in the picture of c; the thermal conductivity-temperature curve of th...
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Abstract
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