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将Fe元素添加到Zr-Ni-Al合金体系中,采用铜模吸铸法在不同电压下制备出直径为3 mm的(Zr0.60Ni0.22Al0.18)96Fe4圆棒合金试样。采用X射线衍射(XRD),扫描电子显微镜(SEM)、示差扫描量热仪(DSC)、微机控制电子式万能试验机和显微硬度计等设备测试了半固态处理对(Zr0.60Ni0.22Al0.18)96Fe4块体非晶合金的非晶形成能力和力学性能的影响。结果表明,10 kV吸铸的(Zr0.60Ni0.22Al0.18)96Fe4试样为完全非晶结构,合金具有较强的非晶形成能力,其过冷液相区宽度ΔTx可以达到78 K,约化玻璃转变温度Trg(Trg=Tg/Tm)可达0.632;电压8 kV时吸铸制得的(Zr0.60Ni0.22Al0.18)96Fe4合金由非晶主相和少量FeZr2晶体相组成,其断裂强度σf为2 077 MPa,显微硬度为720 HV,塑性应变量εp为1.7%;随吸铸电压适量降低,7 kV吸铸时,合金仍为非晶/晶体复合材料,但晶体相份额增多,合金的强度和硬度提高。
The Fe element was added to the Zr-Ni-Al alloy system, and a (Zr0.60Ni0.22Al0.18) 96Fe4 round bar alloy sample with a diameter of 3 mm was prepared by copper die suction casting at different voltages. The influences of the semi-solid state treatment on the (Zr0.60Ni0.22Al0 (Zr0.60Ni0.22Al0) .18) 96Fe4 bulk amorphous alloy amorphous formation and mechanical properties. The results show that the (Zr0.60Ni0.22Al0.18) 96Fe4 samples sintered at 10 kV have a completely amorphous structure and the alloy has a strong amorphous formation ability. The width ΔTx of the supercooled liquid region can reach 78 K The glass transition temperature Trg (Trg = Tg / Tm) can reach 0.632. When the voltage is 8 kV, the (Zr0.60Ni0.22Al0.18) 96Fe4 alloy is composed of amorphous main phase and a small amount of FeZr2 crystal phase, The strength σf is 2077 MPa, the microhardness is 720 HV and the plastic strain εp is 1.7%. With the decrease of the proper voltage, the alloy is still amorphous / crystalline composite at 7 kV absorption, but the crystal phase increases , The strength and hardness of the alloy increase.