Oxygen diffusivities in mullite/zirconia composites measured by 18O/16O isotope exchange and secondary ion mass spectrometry

Hong Da Ko, Chien-Cheng Lin*

*此作品的通信作者

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

Oxygen diffusivities in mullite/zirconia composites were measured by 18O/16O isotope exchange and secondary ion mass spectrometry. They exhibited a wide range of values from 10-21 to 10-10 m2/s at temperatures between 1000 and 1350°C in the composites with 0 to 80 vol% zirconia. At a fixed temperature, oxygen diffusivities in high-zirconia composites were larger by at least eight orders of magnitude than those in low-zirconia composites. The percolation threshold occurred between 30 and 40 vol% zirconia, where oxygen diffusivities dramatically changed. There was a clear tendency of the activation energies of oxygen diffusion in composites to decrease with increasing zirconia contents. The large oxygen diffusivities in the high-zirconia composites were attributed to the interconnected channels of zirconia from the microstructural aspect.

原文English
頁(從 - 到)353-358
頁數6
期刊Journal of Materials Research
23
發行號2
DOIs
出版狀態Published - 1 二月 2008

指紋

深入研究「Oxygen diffusivities in mullite/zirconia composites measured by <sup>18</sup>O/<sup>16</sup>O isotope exchange and secondary ion mass spectrometry」主題。共同形成了獨特的指紋。

引用此