The effect of yttrium additions on the glass formation of the Zr₅₀Cu₄₀Al₁₀ alloy with high oxygen content was investigated. Unlike other reports showing the positive effect of alloying Zr-based alloys with a few percent of rare earth elements, we examined the Y-to-oxygen ratios. As calculated, a stoichiometric amount of yttrium (2808 at ppm) is required to bind all the oxygen (4212 at ppm) to form the Y₂O₃. Additionally, the influence of half (1404 at ppm) and double stoichiometric (5616 at ppm) levels of yttrium, with respect to the measured oxygen content to be bound was evaluated. The Y-doped alloys were synthesized by arc melting, followed by suction casting into copper molds with conical and rod cavities. The critical diameter of the undoped alloy was below 3 mm, while stoichiometric and double stoichiometric yttrium concentrations allowed to obtain 5 and 7 mm diameter glassy samples, respectively. Microstructure observations confirmed the scavenging effect of yttrium, leading to the formation of a cubic (\( Ia\bar{3} \) space group) yttrium sesquioxide. The glass forming ability of the alloys was additionally determined based on differential thermal analysis, allowing to propose the best indicator for the studied Zr-Cu-Al alloys.

研究了钇对高氧含量Zr ₅₀ Cu ₄₀ Al ₁₀合金玻璃形成的影响。与其他报告显示将Zr基合金与少量稀土元素合金化所产生的积极影响不同，我们研究了Y与氧的比率。根据计算，需要化学计量的钇（ppm为2808）才能结合所有氧气（ppm为4212）以形成Y ₂ O ₃。另外，相对于测得的要结合的氧含量，评价了钇的一半（1404ppm）和两倍化学计量（5616ppm）的影响。掺Y的合金是通过电弧熔化法合成的，然后吸铸到具有圆锥形和棒形腔的铜模中。未掺杂合金的临界直径小于3 mm，而化学计量和双化学计量的钇浓度分别允许获得5和7 mm直径的玻璃状样品。微观结构观察证实了钇的清除作用，导致形成了立方晶格（\（Ia \ bar {3} \）空间群）倍半氧化钇。此外，还基于差热分析确定了合金的玻璃形成能力，从而为所研究的Zr-Cu-Al合金提出了最佳指示剂。