3. Determine the atomic structure of the following directions in FCC and BCC structures. [100], [...
2.6 (a) Derive linear density expressions for FCC [100) and[111] directions in terms of the atomic radius R (b) Derive planar density expressions for FCC (100) and (111) planes in terms of the atomic radius R
(a) Differentiate between Face- Centered Cubic (FCC) and Body-Centered Cubic (BCC) crystal structures. Why FCC metals are more ductile than BCC metals? 5 marks) (ii) show the relationship between the unit cell edge length, a, and the atomic radius, R, for a BCC crystal. Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and atomic weight of 55.85 g/mol. Calculate its theoretical density Given: Avogardo's Number is 6.02 x 105 atoms/mol (5 marks) Figure 1 Determine the...
(a) Derive linear density expressions for FCC (100) and [111] directions in terms of the atomic radius Rand (b) compute linear density values for these two directions for silver. (100): atom/R (111) atom/R (b) (100): 1 ! 1/m (111): i 1/m
18. Derive planar density expressions for BCC (100) and (110) planes in terms of the atomic radius R. 19. List close-packed directions and highest-density planes in BCC, FCC and HCP structures. Indicate whether the highest-density planes are close-packed or not.
2.9 Describe FCC, BCC, and HCP lattice structures. 2.10 Two hypothetical metals are created with different elements that have the same atomic mass (g/mole) and the same atomic radius. Metal A has a density of 9.50 g/cm3 and metal B has a density of 8.73 g/cm3. If one of these metals has a BCC lattice structure and the other has an FCC lattice structure, identify the structure that corresponds to each of one of them. Justify your answer. 2.12 Referring...
6. Molybdenum is a BCC structured atom with a 3.1408 angstroms and atomic weight equal to 95.94g/mol a. (1 pts) Determine the APF of Molybdenum. b. (4 pts) Determine the density of Molybdenum 4. (1 pts) Common metallic structures are FCC, BCC, and HCP. Coordination number and atomic packing factor are the same for (circle the answer): a. FCC and BCC b. BCC and HCP c. HCP and FCC d. None of the above
Find the ratio of atomic densities in BCC and FCC solids assume that the lattice constant in BCC is 2 Å and FCC is 4 Å.
What is the major disadvantage of the HCP structure (as compared to the BCC or FCC structure)? Which crystal lattice structure has the tendency to be a very good ductile material? Which crystal lattice structure has the tendency to be a brittle material? If you were to create an alloy with the BCC structure with an element (which has an atomic radius much smaller than the atoms in the crystal structure), what would be the type of defect that will...
1. Expressions for Burgers vectors for FCC and BCC crystal structures, are of the form, b= a/2 <uvw> where a is the unit cell edge length. a. Describe the magnitude of Burgers vectors of dislocations that will glide on the most effective slip system in FCC and BCC crystals respectively. b. Determine the values of bl for aluminum and chromium.
Simple Cubic (SC) Structure 1. Write the Miller indices for the family of close-packed directions in the SC crystal. <hkl>= 2. Write the expression for theoretical density of a material with SC structure in terms of atomic radius (R), atomic weight (A), and Avogadro's number (NA). (Show your work.) 3. Calculate the planar density for the most densely packed SC planes in terms of atomic radius (R). (Show your work.) PD Body-Centered Cubic (BCC) Structure 4. How many non-parallel close-packed...