Table 3.

Chemical composition (in at %) of regions shown in Fig. 7. The OL/IOD interface (Fig. 7(b), region A) was distinguished from other parts of oxide layer owing to the depletion of Cr and increase of Mo and Ti.

ID#	N	O	Al	Si	Ti	Cr	Nb	Mo	Ta
A	—	43.5 ± 7.9	4.3 ± 0.4	0.7 ± 0.1	10.0 ± 1.2	0.5 ± 0.1	9.7 ± 1.2	20.1 ± 1.5	11.2 ± 3.5
B	—	68.3 ± 0.4	1.6 ± 0.6	0.4 ± 0.1	5.9 ± 0.8	0.4 ± 0.1	7.1 ± 0.9	7.3 ± 0.4	9.0 ± 0.2
C	—	67.4 ± 0.9	6.5 ± 0.5	0.2 ± 0.0	3.2 ± 0.7	8.6 ± 0.2	5.9 ± 0.4	1.8 ± 1.0	6.4 ± 0.9
D*	45.0 ± 3.1	2.7 ± 0.8	0.1 ± 0.0	0.2 ± 0.3	50.9 ± 2.2	0.2 ± 0.0	0.5 ± 0.5	0.4 ± 0.4	0.0 ± 0.0

^*Determined with TEM-EDS.