纳米组织锆合金氧化过程中ZrO2晶粒生长特性

Characteristic of ZrO2 Grain Growth during Oxidation in Nanocrystalline Zr-4

摘要:

研究了673 K,10.3 MPa条件下纳米锆合金氧化膜中ZrO2晶粒尺寸长大规律.结果表明,在纳米结构基底上形成的ZrO2,晶粒尺寸均小于在粗晶基底上所形成的ZrO2晶粒尺寸;在纳米结构基底上形成的ZrO2晶粒长大速率小于在粗晶基底上所形成的ZrO2晶粒长大速率.组织纳米化促进了更小尺寸ZrO2的形成,影响了ZrO2晶粒长大动力学过程.

Abstract:

In this paper the characteristic of ZrO2 grain growth during the oxidation in nanocrystalline Zr-4 under 673 K/10.3 MPa conditions was studied. The results show that the grain size and grain growth rate of ZrO2 which formed on the nanostructure basis were smaller than that of ZrO2 formed on the coarse grain basis. So the nanocrystalline treatment leads to fine grain of ZrO2 and has influence on the oxidation dynamics of zircaloy-4