The results indicate that there form six binary intermetallics in the Ni Pt Ta system at 1? 423 K, which are Pt 3Ta, Ni 3Ta, Pt 2Ta, Ni 2Ta, NiTa and NiTa 2. Ni 3Ta and Pt 3Ta form a line compound (Ni,Pt) 3Ta, but no ternary compound is observed.

• 测得Ni Pt Ta三元扩散偶中有 6个二元化合物 :Pt3 Ta ；Pt2 Ta ；Ni3 Ta；Ni2 Ta；NiTa和NiTa2 .；Ni3 Ta与Pt3 Ta形成了一个有较小固溶度的线性化合物 (Ni；Pt) 3 Ta；未发现三元中间化合物