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Mg-Cu-Y-Si合金玻璃形成能力及力學性能

Glass-forming ability and mechanical properties of Mg-Cu-Y-Si alloys

  • 摘要: 利用銅模澆鑄法制備了Mg60Cu30-xY10Six(x=0,1.0,1.8,2.5,5.0)合金.結果表明,當x=1.0時,合金具有最大的玻璃形成能力,并且其顯微硬度和斷裂韌性比Mg60Cu30Y10合金也有明顯改善.與Mg60Cu30Y10合金比較,Mg60Cu29Y10Si1合金過冷液相區寬度ΔTx值減少,但約化玻璃轉變溫度Trg值略有增加.

     

    Abstract: Mg60Cu30-xY10Six(x=0,1.0,1.8,2.5,5.0) bulk amorphous alloys were prepared by copper mould casting. The experimental results show that the alloy with x=1.0 has the largest glass-forming ability among Mg60Cu30-xY10Six(x=0, 1.0, 1.8, 2.5, 5.0) alloys. The microhardness and fracture toughness of Mg60Cu29Y10Si1 alloy are also significantly improved compared with those of Mg60Cu30Y10 alloy, but its supercooled liquid region (ΔTx) decreases slightly. However, the reduced glass transition temperature (Trg) of Mg60Cu29Y10Si1 alloy is larger than that of Mg60Cu29Y10Si1 alloy.

     

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