非晶AlNiZr合金成分的优化

Composition optimization of amorphous AlNiZr alloys

为了解决铝基非晶合金在形成过程中容易析出α-Al晶体导致玻璃形成能力较低且不易评估的问题,设计了简单易行的玻璃形成能力评估方法,对非晶AlNiZr合金成分进行优化。首先,制备9种不同组分的AlNiZr合金铸锭;然后,在相同制备条件下,用单辊甩带法制备不同组分的合金薄带;最后,采用X射线衍射仪对薄带进行XRD表征,基于XRD结果拟合计算合金薄带的非晶含量。结果表明:在合金组分Al_(100-x-y)Ni_(x)Zr_(y)中,随着Ni含量的增加玻璃形成能力提高,随着Zr含量的增加玻璃形能力成降低;当Zr含量为3%时,进一步增加Ni含量达到20%和25%,合金的玻璃形成能力降低,Al_(82)Ni_(15)Zr_(3)具有更好的玻璃形成能力。通过对非晶AlNiZr合金成分的优化,可以为不含稀土元素的铝基合金的玻璃形成能力评估提供新的方法,拓展其在设备防护领域的应用空间。

In order to solve the problem that the glass forming ability of Al-based amorphous alloy is not easy to be evaluated because of the easy precipitation ofα-Al crystal in the glass forming process,a simple and feasible glass forming ability evaluation scheme was designedto optimize the composition of amorphous AlNiZr alloy.Firstly,nine kinds of AlNiZr alloy ingots with different compositions were prepared;Then,under the same preparation conditions,the alloy ribbons with different compositions were prepared by single-roll strip casting method;Finally,the ribbons were characterized by XRD,and the amorphous content of alloy ribbon was calculated based on the XRD results.The results show that the glass-forming ability of Al_(100-x-y)Ni_(x)Zr_(y) increases with the increase of Ni content and decreases with the increase of Zr content;When the Zr content is 3% and the Ni content is further increased to 20%and 25%,the glass-forming ability of the alloy is reduced,and Al_(82)Ni_(15)Zr_(3) alloy has better glass-forming ability.By optimizing the compositions of amorphous AlNiZr alloy,a new evaluation scheme of glass-forming ability can be provided for the Al-based alloy without rare earth elements,and its application space in the field of equipment protection can be expanded.