Which of these has a higher density?
SCC
FCC
BCC
Explain why
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SHOW THE BCC AND FCC phases
and if there is order bcc and explain each one
ex3 ED 30 40 Two eta (in degrees) 70 80
(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...
26. Which one of the following crystallographic planes represents FCC and BCC planes respectively? av2 (4 (a) 1: BCC, 2: BCC, 3: FCC, 4: FCC (b) 1: FCC, 2: BCC, 3: FCC, 4: BCC (c) 1: BCC, 2: FCC, 3: FCC, 4: BCC (d) l: BCC, 2: FCC, 3: BCC, 4: FCC
Additional study has found that wolverite has an allotrope that forms a BCC crystal with a unit length of 0.188 nm. [A] What is the density of this allotrope? [B] what is the allotrope's atomic radius? [C] Which form (FCC or BCC) has the greater density? [D] Which form (FCC or BCC) has the larger radius?
Calculate (a) LD for FCC Al
and (b) for BCC Cr
Problem 4 on Linear density of atoms (LD) LD along a certain direction vector of a crystal is defined as LDZ= number of atoms centered along the x direction vector length of the x direction vector For example, along 100 direction of a cubic crystal Linear density is defined as LD 100 = 1 number of atoms centered on [100] direction vector length of [100] direction vector Similarly LD...
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...
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...
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.
Calculate the theoretical density of silver given that it is FCC, has a lattice parameter of 4.0862 Å with an atomic weight of 107.868 g/mole. Compare your value to the density derived experimentally for silver. Why is there a difference? Explain.
1. State the difference between I and polycrystalline materials. Deformability of BCC and FCC metals. Strength and UTS of metals. 2. Determine the slip systems in BCC and FCC materials. Show the calculations that support your determinations. 3. Find the indices that represent the planes in the following cubic unit cell and show the X-Ray diffract-ability of the these planes in FCC and BCC structures: 4. A tensile specimen with a 12 mm initial diameter and 50 mm gauge length...