Structure and bonding at Ni-ZrO2 (cubic) interfaces formed by the reduction of a NiO-ZrO2 (cubic) composite

被引：41
作者：
Dickey, EC
Dravid, VP
Nellist, PD
Wallis, DJ
Pennycook, SJ
Revcolevschi, A
机构：
[1] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831
[2] UNIV ILLINOIS,DEPT PHYS MC,CHICAGO,IL 60607
[3] UNIV PARIS 11,LAB CHIM SOLIDES,F-91405 ORSAY,FRANCE
来源：
MICROSCOPY AND MICROANALYSIS | 1997年 / 3卷 / 05期
关键词：
interfaces; composite; nickel oxide; zirconia; Z contrast; HREM; EELS; STEM;
D O I：
10.1017/S1431927697970343
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Ni-ZrO2 (cubic) interfaces formed by the reduction of NiO-ZrO2 (cubic) directionally solidified eutectics (DSEs) have been studied at an atomic scale by Z-contrast scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS). The Ni maintains the same crystallographic orientation relationship with ZrO2 as does NiO, but the Ni twins with respect to the NiO during the phase transformation. The quantitative structural and chemical information obtained from electron imaging and spectroscopy techniques indicates that bonding at the Ni-ZrO2 interface occurs between Ni and Zr, not between Ni and O. EELS confirms that the first Ni plane is predominately metallic with less than 4% Ni2+ ions residing in the interface plane.
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收藏
页码：443 / 450
页数：8
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