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研究了Ni元素的添加对不同成分的Al-Sm二元合金非晶形成能力及硬度的影响。利用单辊急速冷却实验设备制备了Al90Sm6Ni4,Al81.6Sm6.4Ni12,Al72.4Sm17.6Ni10和Al76Sm20Ni4等不同成分的合金条带。结果表明,添加Ni之后,非晶形成的成分范围从8%~12%Sm增至6%~20%Sm,合金的晶化温度最高增加到529 K;Al72.4Sm17.6Ni10合金的维氏硬度达到574 HV,远远超过了Al-Sm二元合金的160~250 HV。Al-Sm-Ni三元合金具有良好的热稳定性和优异的力学性能,主要是由于第三组元Ni的添加造成体系扩散系数减小,较小的扩散系数和较高的扩散激活能在低温下能够降低原子扩散能力并增加粘度系数,有利于非晶相的形成。
The effects of Ni addition on the amorphous formability and hardness of Al-Sm binary alloys with different compositions were investigated. The alloy strips with different composition such as Al90Sm6Ni4, Al81.6Sm6.4Ni12, Al72.4Sm17.6Ni10 and Al76Sm20Ni4 were prepared by single roller rapid cooling experimental equipment. The results show that after addition of Ni, the composition of amorphous components increases from 8% ~ 12% Sm to 6% ~ 20% Sm, and the maximum crystallization temperature increases to 529 K. The Vickers hardness of Al72.4Sm17.6Ni10 alloy Reaching 574 HV, far exceeding the 160-250 HV of Al-Sm binary alloys. Al-Sm-Ni ternary alloy has good thermal stability and excellent mechanical properties, mainly due to the decrease of the system diffusion coefficient due to the addition of the third element Ni, the smaller diffusion coefficient and the higher diffusion activation energy Low temperature can reduce the atomic diffusion ability and increase the viscosity coefficient, is conducive to the formation of amorphous phase.