Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the surface concentration is maintained at 0

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Nitrogen From A Gaseous Phase Is To Be Diffused Into Pure Iron At 700 C If The Surface Concentration Is Maintained At 0 1 (21.5 KiB) Viewed 48 times

Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the surface concentration is maintained at 0.29 wt% N, what will be the concentration (in weight percent) 3.2 mm from the surface after 5.8 h? The diffusion coefficient for nitrogen in iron at 700°C is 3.2 x 10 10 m²/s. z 0.00 0.025 0.05 0.10 0.15 0.20 0.25 0.30 0.35 erf(z) 0.0000 0.0282 0.60 0.0564 0.65 0.1125 0.70 0.1680 0.75 0.2227 0.80 0.85 0.90 0.95 0.2763 0.3286 0.3794 2 0.55 erf(z) 0.5633 0.6039 0.6420 0.6778 0.7112 0.7421 0.7707 0.7970 0.8209 Z 1.3 14 1.5 1.6 1.7 1.8 1.9 2.0 2.2 erf(z) 0.9340 0.9523 0.9661 0.9763 0.9838 0.9891 0.9928 0.9953 0.9981