Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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erm 1 Question 12 of 14 Using the Tabulation of Diffusion Data, answer the following: (a) Calculate the diffusion coefficient for Cu in Niat 550°C. m²/s (Use scientific notation.) Diffusing Species Fe Fe (b) What time (in h) will be required at 610°C to produce the same diffusion result (in terms of concentration at a specific point) as for 12 h at 550°C? C < > C Cu Zn Al Cu Mg Cu Tabulation of Diffusion Data Host Metal a-Fe (BCC) y-Fe (FCC) a-Fe y-Fe ठठ h Al Al Al Ni Do(m²/s) 2.8 x 10-4 5.0 × 10-5 6.2 x 10-7 2.3 x 10-5 7.8 x 10-5 2.4 x 10- 2.3 x 10-4 6.5 x 10-5 1.2 x 10- 2.7 x 10-5 Activation Energy Qa eV/atom 2.60 kJ/mol 251 284 80 148 211 189 144 136 131 256 2.94 0.83 1.53 2.19 1.96 1.49 1.41 1.35 2.65 Calculated Values T(°C) 500 900 900 1100 500 900 900 1100 500 500 -/15 E 500 500 500 500 D(m²/s) 3.0 x 10-21 1.8 x 10-15 1.1 x 10-17 7.8 x 10-16 2.4 x 10-12 1.7 x 10-10 5.9 x 10-12 5.3 x 10-11 4.2 x 10-19 4.0 x 10-IN 4.2 x 10-14 4.1 x 10-14 1.9 x 10-1 1.3 x 10-22 *** Source: E. A. Brandes and G. B. Brook (Editors), Smithells Metals Reference Book, 7th edition, Butterworth- Heinemann, Oxford, 1992.
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Transcribed Image Text:erm 1 Question 12 of 14 Using the Tabulation of Diffusion Data, answer the following: (a) Calculate the diffusion coefficient for Cu in Niat 550°C. m²/s (Use scientific notation.) Diffusing Species Fe Fe (b) What time (in h) will be required at 610°C to produce the same diffusion result (in terms of concentration at a specific point) as for 12 h at 550°C? C < > C Cu Zn Al Cu Mg Cu Tabulation of Diffusion Data Host Metal a-Fe (BCC) y-Fe (FCC) a-Fe y-Fe ठठ h Al Al Al Ni Do(m²/s) 2.8 x 10-4 5.0 × 10-5 6.2 x 10-7 2.3 x 10-5 7.8 x 10-5 2.4 x 10- 2.3 x 10-4 6.5 x 10-5 1.2 x 10- 2.7 x 10-5 Activation Energy Qa eV/atom 2.60 kJ/mol 251 284 80 148 211 189 144 136 131 256 2.94 0.83 1.53 2.19 1.96 1.49 1.41 1.35 2.65 Calculated Values T(°C) 500 900 900 1100 500 900 900 1100 500 500 -/15 E 500 500 500 500 D(m²/s) 3.0 x 10-21 1.8 x 10-15 1.1 x 10-17 7.8 x 10-16 2.4 x 10-12 1.7 x 10-10 5.9 x 10-12 5.3 x 10-11 4.2 x 10-19 4.0 x 10-IN 4.2 x 10-14 4.1 x 10-14 1.9 x 10-1 1.3 x 10-22 *** Source: E. A. Brandes and G. B. Brook (Editors), Smithells Metals Reference Book, 7th edition, Butterworth- Heinemann, Oxford, 1992.
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