Table 2.

Chemical composition (in at %) of regions shown in Fig. 4(d).

ID#	N	O	Al	Si	Ti	Cr	Nb	Mo	Ta
A	—	69.0 ± 0.5	4.0 ± 0.8	0.2 ± 0.0	2.2 ± 0.3	10.8 ± 1.2	5.7 ± 0.6	1.1 ± 0.3	7.2 ± 0.1
B*	30.5 ± 3.6	6.9 ± 0.0	1.9 ± 0.0	1.1 ± 0.3	57.0 ± 2.7	0.7 ± 0.1	0.9 ± 0.3	0.7 ± 0.2	0.3 ± 0.1

^*Determined with transmission electron microscope (TEM)-EDS.