Table 6.2 A Tabulation of Diffusion DataA ctivation Energy QaDiffusingSpeciesHostMetalD.(m²/ s)kJ/moleVl atomFea-Fe2.8 × 10-42512.60(ВС)5.0 × 10-5у-Fe(FCC)Fe2842.94a-Fe6.2 × 10-7800.83у-Fe2.3 × 10-51481.53Table 6.1 Tabulation of Error Function Valueserf(z)erf(z)erf(z)0.550.56331.30.93400.0250.02820.600.60391.40.95230.050.05640.650.64201.50.96610.100.11250.700.67781.60.97630.150.16800.750.71121.70.98380.200.22270.800.74211.80.98910.250.27630.850.77071.90.99280.300.32860.900.79702.00.99530.350.37940.950.82092.20.99810.400.42841.00.84272.40.99930.450.47551.10.88022.60.99980.500.52051.20.91032.80.9999 To increase hardness of steel gear, it was carburized at 1040°C by introducing 1.5%C at itssteel surface. What will be the final carbon content 0.0014 m beneath the surface if thistreatment was lasted for 12 hours. The initial carbon content of steel is 0.1%C. (gas constantis 8.31 J/mol K).

Name: Table 6.2 A Tabulation of Diffusion DataA ctivation Energy QaDiffusin
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Description: Table 6.2 A Tabulation of Diffusion DataA ctivation Energy QaDiffusingSpeciesHostMetalD.(m²/ s)kJ/moleVl atomFea-Fe2.8 × 10-42512.60(ВС)5.0 × 10-5у-Fe(FCC)Fe2842.94a-Fe6.2 × 10-7800.83у-Fe2.3 × 10-51481.53Table 6.1 Tabulation of Error Function Value

According to Fick's law, the concentration gradient of a composition is equal to the molar flux…

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To increase hardness of steel gear, it was carburized at 1040°C by introducing 1.5%C at its steel surface. What will be the final carbon content 0.0014 m beneath the surface if this treatment was lasted for 12 hours. The initial carbon content of steel is 0.1%C. (gas constant is 8.31 J/mol K).

To increase hardness of steel gear, it was carburized at 1040°C by introducing 1.5%C at its steel surface. What will be the final carbon content 0.0014 m beneath the surface if this treatment was lasted for 12 hours. The initial carbon content of steel is 0.1%C. (gas constant is 8.31 J/mol K).

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Question

Table 6.2 A Tabulation of Diffusion Data
A ctivation Energy Qa
Diffusing
Species
Host
Metal
D.(m²/ s)
kJ/mol
eVl atom
Fe
a-Fe
2.8 × 10-4
251
2.60
(ВС)
5.0 × 10-5
у-Fe
(FCC)
Fe
284
2.94
a-Fe
6.2 × 10-7
80
0.83
у-Fe
2.3 × 10-5
148
1.53
Table 6.1 Tabulation of Error Function Values
erf(z)
erf(z)
erf(z)
0.55
0.5633
1.3
0.9340
0.025
0.0282
0.60
0.6039
1.4
0.9523
0.05
0.0564
0.65
0.6420
1.5
0.9661
0.10
0.1125
0.70
0.6778
1.6
0.9763
0.15
0.1680
0.75
0.7112
1.7
0.9838
0.20
0.2227
0.80
0.7421
1.8
0.9891
0.25
0.2763
0.85
0.7707
1.9
0.9928
0.30
0.3286
0.90
0.7970
2.0
0.9953
0.35
0.3794
0.95
0.8209
2.2
0.9981
0.40
0.4284
1.0
0.8427
2.4
0.9993
0.45
0.4755
1.1
0.8802
2.6
0.9998
0.50
0.5205
1.2
0.9103
2.8
0.9999

To increase hardness of steel gear, it was carburized at 1040°C by introducing 1.5%C at its
steel surface. What will be the final carbon content 0.0014 m beneath the surface if this
treatment was lasted for 12 hours. The initial carbon content of steel is 0.1%C. (gas constant
is 8.31 J/mol K).

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To increase hardness of steel gear, it was carburized at 1040°C by introducing 1.5%C at its steel surface. What will be the final carbon content 0.0014 m beneath the surface if this treatment was lasted for 12 hours. The initial carbon content of steel is 0.1%C. (gas constant is 8.31 J/mol K).