ENG 2002 Lecture Notes - Carburizing, Astm International, Activation Energy

• School: York University
• Department: Engineering
• Course: ENG 2002
• Professor: Hany E.Z.Farag

Document Summary

Assignment #3: imperfections and diffusion: calculate the fraction of atom sites that are vacant for lead at its melting temperature of 327oc. Assume an energy for vacancy formation of 0. 55 ev/atom: calculate the activation energy for vacancy formation in aluminum, given that the equilibrium number of vacancies at 500oc is 7. 57x1023 m-3. The atomic weight and density (at 500oc) for aluminum are, respectively 26. 98 g/mol and 2. 62 g/cm3: what is the composition, in atom percent, of an alloy that consists of 30 wt% zn and 70 wt%