【摘要】 给出了几种高效制备Ir/Re复合材料(CVD方法制备)金相的方法。发现Re层组织分为靠近Ir层的细晶粒区和柱状晶粒区,分别测定了相应晶粒度。同时对退火孪晶、V,W型侵蚀纹和晶界上的kirkendall孔洞等的特点进行观察和分析。通过Ir层组织的SEI像,了解了Ir晶粒的形貌和生长特点,同时计算并给出了Ir晶粒的生长动力学方程。更多还原

【Abstract】 Several methods were given for metallographic preparation of iridium/rhenium composite obtained by chemical vapor deposition. Rhenium layer microstructure include column grain zone and fine grain zone near the iridium layer. Grain size was measured in both zones. Features of annealing twin crystal, V etch net and void of Kirkendall in grain boundary were studied. Grain image and growth features are studied through second electronic image of Iridium layer microstructure. Kinetic equation of Iridium grain growth is achieved.更多还原