Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 5.7, Problem 30AAP
To determine
Calculate the activation energy.
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Chapter 5 Solutions
Foundations of Materials Science and Engineering
Ch. 5.7 - Prob. 1KCPCh. 5.7 - Write an equation for the number of vacancies...Ch. 5.7 - Prob. 3KCPCh. 5.7 - Prob. 4KCPCh. 5.7 - Describe the substitutional and interstitial...Ch. 5.7 - Prob. 6KCPCh. 5.7 - What factors affect the diffusion rate in solid...Ch. 5.7 - Write the equation for Ficks second law of...Ch. 5.7 - Prob. 9KCPCh. 5.7 - Prob. 10KCP
Ch. 5.7 - (a) Calculate the equilibrium concentration of...Ch. 5.7 - Prob. 12AAPCh. 5.7 - Determine the diffusion flux of zinc atoms in a...Ch. 5.7 - The diffusion flux of copper solute atoms in...Ch. 5.7 - Prob. 15AAPCh. 5.7 - Prob. 16AAPCh. 5.7 - Prob. 17AAPCh. 5.7 - A gear made of 1020 steel (0.20 wt% C) is to be...Ch. 5.7 - Prob. 19AAPCh. 5.7 - The surface of a steel gear made of 1020 steel...Ch. 5.7 - Prob. 21AAPCh. 5.7 - If boron is diffused into a thick slice of silicon...Ch. 5.7 - Prob. 23AAPCh. 5.7 - Prob. 24AAPCh. 5.7 - Prob. 25AAPCh. 5.7 - Prob. 26AAPCh. 5.7 - Prob. 27AAPCh. 5.7 - Prob. 28AAPCh. 5.7 - Prob. 29AAPCh. 5.7 - Prob. 30AAPCh. 5.7 - The diffusivity of copper atoms in the aluminum...Ch. 5.7 - Prob. 32AAPCh. 5.7 - Prob. 33SEPCh. 5.7 - Prob. 34SEPCh. 5.7 - Prob. 37SEPCh. 5.7 - Prob. 38SEPCh. 5.7 - The activation energy of nickel atoms in FCC iron...Ch. 5.7 - Prob. 40SEPCh. 5.7 - The self-diffusion of iron atoms in BCC iron is...Ch. 5.7 - Would you expect the diffusion rate of copper...Ch. 5.7 - Would you expect the diffusion rate of copper...Ch. 5.7 - Prob. 44SEPCh. 5.7 - Prob. 45SEPCh. 5.7 - Prob. 46SEPCh. 5.7 - Prob. 47SEPCh. 5.7 - Prob. 48SEPCh. 5.7 - Prob. 49SEPCh. 5.7 - Prob. 50SEP
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- What is the volume of 3.00 moles of copper? Molar mass of copper is 63.546 g/mol and its density is 8.9 x 103 kg/m3.arrow_forwardShow that Ni and Cu are totally soluble in one another using Hume-Rothery rules. Atomic radii, electronegativities and crystal structures of Ni and Cu are given below. Ni Cu Crystal Structure FCC FCC Electronegativities 1.9 1.8 r (nm) 0.1246 0.1278arrow_forwardCopper at 500 °C has 1.10×1015 vacancies/cm³. The atomic weight of Cu is 63.55 g/mol and the density at this temperature is 8.96 g/cm³. Avogadro constant NA ~ 6.022×1023 atoms/mol. Boltzmann constant (K) - 8.62×10-³ ev/atom • K. (a) What is the activation energy required to create a vacancy in Cu? (b) Cu is then cooled to 400 °C. What will be the number of vacancies per cubic centimeter? Assume that the change in the density in the cooling is negligible.arrow_forward
- Determine the approximate density of a Ti-6Al-4V titanium alloy that has a composition of 90 wt% Ti, 6 wt% Al, and 4 wt% Varrow_forwardIron (Fe) undergoes an allotropic transformation at 912°C: upon heating from a BCC (α phase) to an FCC (γ phase). Accompanying this transformation is a change in the atomic radius of Fe—from RBCC = 0.12584 nm to RFCC = 0.12894 nm—and, in addition, a change in density (and volume). Compute the percentage volume change associated with this reaction. Indicate a decreasing volume by a negative number.arrow_forwardDetermine the activation energy for vacancy formation in aluminum, if theequilibrium number of vacancies at 500 °C is 7.57 × 1023 m-3. Given that theatomic weight and density for aluminum are 26.98 g/mol and2.62 g/cm3, respectively.arrow_forward
- The force of attraction between a divalent cation and a monovalent anion is 8.02x10-9 N. If the ionic radius of the cation is 0.060 nm, (q=1.6x10-19 C, k0=9x109 V∙m/C). What is the anion radius?arrow_forwardThe activation energy for the diffusion of atomic species A in metal B is 114 kJ/mol. Calculate the diffusion coefficient at 891°C, given that the value of D at 1170°C is 76.7 × 10^-12 m2/s.arrow_forwardBrass is a substitutional solid solution alloy consisting of 66 wt% Cu and 34 wt% Zn. The density of the pure Cu and Zn are 8.96 g/cm³ and 7.13 g/cm³, respectively. Avogadro constant NA 6.022×1023 atoms/mol. The atomic weights of Zn and Cu are 65.38 g/mol and 63.55 g/mol, respectively. Compute the number of Zn atoms per cubic centimeter of brass.arrow_forward
- (6) For an aluminum alloy under constant load, the creep rate increased by a factor of 2 when the temperature was increased from 71°C to 77°C. Find the activation energy and express it in Joule/mole.arrow_forwardempt in Progress Calculate the number of Frenkel defects per cubic meter in zinc oxide at 939°C. The energy for defect formation is 2.51 eV, while the density for ZnO is 5.55 g/cm³ at this temperature. The atomic weights of zinc and oxygen are 65.41 g/mol and 16.00 g/mol, respectively. N₁= 6.5e17 defects/m³ M Qu Mult Ques Multinarrow_forwardFor alloy of two hypothetical metals A and B, there exist an a, A-rich phase and a B, B-rich phase. For alloys of two different overall compositions at 25°C, the weight fractions of Wa and WB are listed in the table. Determine the solubility limits for both a and B phases at 25°C. Alloy Composition Wa WB 70wt% A-30wt% B 0.78 0.22 35wt% A-65wt% B 0.36 0.64arrow_forward
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