基于密度泛函理论,采用第一性原理赝势平面波方法计算了合金元素Ta掺杂对y’-Ni3Al相弹性常数与电子结构的影响.计算结果表明:Ta的加入能有效提高Ni3Al相的弹性性质,使其弹性模量提高12.86％,形成的Ni3(Al,Ta)金属间化合物是一种塑性相,但其本征脆性要比Ni3Al大；使用总化学键的重叠布居,定量地计算了金属间化合物的共价键性能,结果显示Ta的添加能增加Ni3Al相共价键的强度；价电荷密度及态密度的进一步分析指出:Ni3(Al,Ta)相中化学键有方向共价键和金属键共存的特征.
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