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[en] Bulk copper alloys with nano TiB2 particles were prepared by a new technology that combining in situ reaction with rapid solidification. Appropriate reactor shape and procedure parameters are as follows: S0/(S1 + S2) = 0.8-1.2, L0/D0 = 10-15, θ = 60-90o, melt temperature 1350-1450 deg. C, air pressure 0.2-0.3 MPa. A special water-cooled copper mold can satisfy the need of rapid solidifying Cu-TiB2 alloy melt. The average size of TiB2 particle in the copper matrix synthesized by using optimal parameters is about 20 nm
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