中文摘要：

采用Zn／Fe及Zn／Fe-Mn固固扩散偶方法，研究了锰对金属间化合物生长动力学的影响。对扩散偶在385℃扩散10-300min的研究结果表明，在Zn／Fe扩散偶中，扩散层以8相为主，〈相和8相之间具有平直的界面，随扩散时间的延长，艿相的厚度增加，（相逐渐被消耗，厚度比dζ／dδ的值逐渐减小；在Zn／Fe-Mn扩散偶中，扩散层也以δ相为主，ζ相和δ相之间的界面更平直，铁基体中的锰在扩散初期促进8相的生长，但在扩散后期促进ζ相生长。对Zn／Fe-Mn扩散偶中金属间化合物的生长动力学研究表明，0．4％（质量分数，下同）的锰使扩散层总厚度增加，当锰含量增加到1．2％以上时，扩散层总厚度反而开始下降。Zn／Fe、Zn／Fe-O．4％Mn、Zn／Fe-1．2％Mn及Zn／Fr2．0％Mn四个扩散偶中总扩散层的生长均由扩散控制。

英文摘要：

The growth of ZnFe intermetallic compounds and the effect of Mn were studied by means of diffusion experiments at 385℃for 10-300min. The results show that the layer is mainly composed of 8 phase in Zn/Fe couples, the interface between g and 8 is planar, the thickness of 8 phase increases and ζ phase decreases with prolongation of time, the value of dζ/dδ also decreases with time. In Zn/Fe-Mn couples, the diffusion layer is mainly com- posed of δ phase, the interface between ζ and δ is more planar, and the manganese in iron promotes the growth of δ phase in the initial period but the growth of ζis promoted in the later period. The results of Zn/Fe-Mn couples show that 0. 4% manganese makes the total thickness of diffusion layer increase, however, when the manganese content increases to 1.2%, the total thickness decreases. The growth of the total layer in four couples Zn/Fe,Zn/Fe-0. 4%Mn, Zn/Fe-1.2%Mn and Zn/Fe-2. 0%Mn are diffusion-controlled.