Consider the metal Niobium (Nb). a) Calculate the planar density of the (101) plane b) From...
mot MSE 260 Materials Science and Engineering - Homework 4 1. (3.70) The metal niobium (Nb) has a BCC crystal structure. If the angle of diffraction for the (211) set of planes occurs at 75.99° (first-order reflection) when monochromatic X-radiation having a wavelength of 0.1659 nm is used, compute the following: (a) the interplanar spacing for this set of planes and (b) the atomic radius for the Nb atom. 2. (3.71) For which set of crystallographic planes will a first-order...
Niobium (Nb) has the BCC crystal with a lattice parameter a 0.3294 nm. Find the planar concentrations as the number of atoms per nm2 of the (100), (110) and (111) planes. Which plane has the most concentration of atoms per unit area? Sometimes the number of atoms per unit area nsurface on the surface of a crystal is estimated by using the relation nsurface - nbulk2/3 where nbulk is the concentration of atoms in the bulk. Compare nsurface values with...
(a) Derive planar density expressions for BCC (110) plane in terms of the atomic radius R. (b) Compute and compare planar density values for the same plane for molybdenum.
Given Values Atomic Radius (nm) = 0.18 FCC Metal = Silver BCC Metal: = Sodium Temperature (c) = 1127 Metal A = Zinc Equilibrium Number of Vacancies (m^-3) = 7.42E + 23 Temperature for Metal A = 247 Metal B = Calcium If the atomic radius of a metal is the value shown above and it has the face-centered cubic crystal structure, calculate the volume of its unit cell in nm^3 Your Answer = What is the atomic packing factor...
Show the calculations for both problems
11) Niobium (Nb) is a metal that crystalizes with cubic unit cell that is body-centered (BCC). Nb has an atomic radius of 143 pm. What is its density in g/cm3? A) 4.28 g/cm3 B) 17.1 g/cm3 r=143 C) 9.33 g/cm3 D) 52.8 g/cm3 E) 8.57 g/cm3 VEISIUI 3 12) A mystery solution (with a mole fraction of solute of 0.15) has a vapor pressure of 65.0 torr at 85.0 °C. What is the vapor...
Consider the precious metal, gold (Au). It has the FCC structure
and an atomic radius of 0.144 nm. It has an atomic mass of 52.00
g/mole and an atomic number 79. Avogadro's nmber is 6.023 x
1023 atoms/mole.
Calculate the planar density for (111) plane (in
atoms/nm2).
Hint: The area of an equilateral triangle
is a
r e a = 3 2 s 2 where s is the length of the side of the
triangle.
--Given Values-- Atomic Radius (nm) = 0.116 FCC Metal = Gold BCC Metal: = Sodium Temperature ( C ) = 1017 Metal A = Tin Equilibrium Number of Vacancies (m-3) = 6.02E+23 Temperature for Metal A = 369 Metal B = Gallium 1) If the atomic radius of a metal is the value shown above and it has the face-centered cubic crystal structure, calculate the volume of its unit cell in nm3? Write your answers in Engineering Notation. ...
Q3. Calculate the theoretical density of the following metals in g/cmº given their atomic radius and crystal structure. Compare those results with the accepted density. (8 points) Metal Crystal Structure FCC Aluminum Copper Nickel Silver Atomic Radius (m x 10) 0.1413 0.1278 0.1246 0.1445 FCC FCC Q4. Explain how slipping of atoms in metallic bonds lead to ductile behavior. (2 points) Q5. Explain why a polymer (plastic) described as thermoset is more difficult to recycle when compared to one described...