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利用Yb部分替换Al-0.2Sc-0.04Zr合金中Sc,通过对其室温硬度、拉伸性能和电阻率测试,研究了Al-(0.2-x)Si-xYb-0.04Zr合金的力学性能和导电性能。结果表明,合金具有明显的时效强化行为。Yb含量为0.05%、0.10%和0.15%的合金峰时效温度在330℃附近,而不含Sc的Al-0.2Yb-0.04Zr合金峰时效温度在280℃;相应的峰时效态抗拉强度分别为155、140、104和85 MPa。Yb(部分)替代Sc虽然降低了Al-0.2Sc-0.04Zr合金的力学性能,但提高了其导电性。综合力学、电学性能,尤其是成本因素发现,Al-0.1Sc-0.1Yb-0.04Zr合金在耐热导电材料领域最具应用前景。
The partial substitution of Yb for Sc in Al-0.2Sc-0.04Zr alloy was studied by measuring the hardness, tensile properties and resistivity of Al-0.2Sc-0.04Zr alloy at room temperature. The mechanical properties and electrical conductivity of Al-0.2-xSi- performance. The results show that the alloy has obvious aging strengthening behavior. The peak aging temperature of alloys with Yb content of 0.05%, 0.10% and 0.15% is around 330 ℃, while the peak aging temperature of Al-0.2Yb-0.04Zr alloy without Sc at 280 ℃; 155, 140, 104 and 85 MPa. Yb (partial) replacement of Sc reduces the mechanical properties of Al-0.2Sc-0.04Zr alloy, but enhances its conductivity. Comprehensive mechanical, electrical properties, especially cost factors found that Al-0.1Sc-0.1Yb-0.04Zr alloy in the field of heat-conducting materials the most promising applications.