论文部分内容阅读
利用磁控溅射技术制备了Ｆｅ含量（质量分数，％）分别为２５和５０的两种Ｆｅ－Ｃｕ纳米涂层，并研究了该涂层在７００与 ８００ ℃空气中的氧化结果表明， Ｆｅ—７５Ｃｕ涂层氧化后形成了外层为氧化铜和内侧为氧化铁的复合氧化膜，而 Ｆｅ—５０Ｃｕ发生了 Ｆｅ的单一外氧化，其氧化特征均有别于同成分的铸态合金这种氧化机制在于晶粒尺寸细化显著扩展了 Ｆｅ在 Ｃｕ中的溶解度，同时大量的晶界也为组元扩散提供了短路通道，晶粒尺寸纳米化有助于降低难互溶双相合金体系中发生最活泼组元由内氧化向单一外氧化转变的临界浓度
Two types of Fe-Cu nano-coating with Fe content (mass fraction,%) of 25 and 50 were prepared by magnetron sputtering. The oxidation of the coating in air at 700 and 800 ℃ was studied. The results show that Fe -75Cu coating oxidized to form a composite oxide film with the outer layer of copper oxide and the inner side of the iron oxide, and Fe-50Cu single external oxidation of Fe occurred, the oxidation characteristics are different from the same composition as the as-cast alloy The mechanism of oxidation is that the refinement of the grain size significantly increases the solubility of Fe in Cu, while a large number of grain boundaries also provide a short-circuit path for the diffusion of the composition. Nanocrystallization of the grain size helps to reduce the occurrence of miscibility in the dual-phase alloy system The most active component from the internal oxidation to a single external oxidation of the critical concentration