Table 13.

SEM/SDD-EDS analysis of metal carbides (results in atom fractions)

Carbide	C ideal	C mean	Relative error (%)	σ	Relative σ (%)	Metal ideal	Metal mean	Relative error (%)	σ	Relative σ (%)
Cr3C2	0.4000	0.3967	−0.83	0.0029	0.73	0.6000	0.6033	0.55	0.0029	0.48
Cr7C3	0.3000	0.2961	−1.3	0.0098	3.3	0.7000	0.7039	0.57	0.0098	1.4
Cr23C6	0.2069	0.2069	0	0.0039	1.9	0.7931	0.7931	0	0.0039	0.49
Fe3C	0.2500	0.2469	−1.2	0.00085	0.35	0.7500	0.7531	0.42	0.00085	0.11