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对碳纤维进行预处理后与铝粉机械混合,用压力机制备预制块,将过热铝液与预制块混合并浇注试样。结果表明:行星球磨机转速300 r/min,混制时间20 min的条件下,可获得分散度较好的预制块粉末;压强为20 MPa、保压为2.5~3 min的工艺条件下,获得了较好的预制块,并与860℃的过热铝液混合后浇注试样;经过激光刻蚀、高温灼蚀、化学镀铜预处理的短碳纤维比未经过预处理的碳纤维在铝基体中的分散效果好。
The carbon fibers are pre-treated and mechanically mixed with the aluminum powder, the preform is prepared by a press machine, the superheated aluminum liquid is mixed with the prefabricated block and the sample is poured. The results show that under the conditions of 300 r / min planetary speed and 20 min mixing time, the powder with good dispersity can be obtained. Under the condition of pressure 20 MPa and packing pressure 2.5 ~ 3 min, Better preform, and mixed with superheated aluminum liquid at 860 ℃ after pouring the sample; after laser etching, high temperature burning, electroless copper pretreatment of short carbon fiber than without pretreatment of carbon fiber dispersion in the aluminum matrix Good effect.