1. Consider the possibility of solid solutions with Au acting as the solvent.
a.) Which element (N. Ag, or Cs) is most likely to form an interstitial solid solution which Au?
b.) Which element (N, Ag, or Cs) is most likely to form a substitutional solid solution with Au?
2. SiO2 can be either a glass or a crystalline solid at room temperature. Is diffusion faster in vitreous (glassy) silica or crystalline silica? Why?
3. Consider the diffusion of C into Fe. At approximately what temperature would a specimen of Fe have to be caburized for 2 hours to produce the same diffusion result as at 900*C for 15 hours?
4. A candidate material for a turbine blade application oxidizes by diffusion of metal atoms through the oxide to the metal surface, where metal and oxygen react to form the oxide. After 10 hours at 550*C, an oxide layer 8µm thick has formed. What will the thickness be after 100 hours?