HW2-new - shown in the following figure PROBLEM 5: Pure...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Intensity (A.U) A B C 1/2 1/2 y z 1/2 2/3 D ME311 MATERIALS ENGINEERING SPRING 2011 HOMEWORK #2 DUE DATE: February 11, before class PROBLEM 1: Draw a sketch, similar to Figure 2.10 in the textbook, showing the atomic arrangement and bonding you would expect to find in a molecule of oxygen (O 2 ) and in a molecule of ethylene (C 2 H 4 ). PROBLEM 2: What type of bonding would you expect for pure Calcium (Ca), pure Germanium (Ge), pure Barium Sulfide (BaS) and pure H 2 ? PROBLEM 3: In the Figure below the Auger spectrum of a particular element is shown. On the basis of the Table below, indicate which element can produce such a spectrum and describe schematically the electronic transitions taking place? Kinetic Energy (eV)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Table: Binding energies of various elements for different energy levels. Al Cu C Si E K =1559 (1s) E K =8979 (1s) E K =284.2 (1s) E K =1839 (1s) E L1 =117.8 (2s) E L1 =1096.7 (2s) E L1 =10.5 (2s) E L1 =149 (2s) E L2 =72.9 (2p) E L2 =952.3 (2p) E L2 =4.6 (2p) E L2 =99.8 (2p) PROBLEM 4: Identify the rotational and mirror symmetries associated with the patterns
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: shown in the following figure PROBLEM 5: Pure iron goes through an allotropic transformation from bcc to fcc at approximately 910C. At the transformation temperature, the lattice parameter of bcc iron is 2.863 and the lattice parameter of fcc iron is 3.591 . Calculate the volume change associated with the transformation. Would you expect the material to expand or contract? Hint: Consider the fact that bcc iron has 2 atoms/unit cell, while fcc iron has 4 atoms/unit cell, and that the total number of atoms during the transformation does not change. PROBLEM 6: Determine the relationship between the atomic radius and the lattice parameter in the body centered cubic structure. PROBLEM 7: Determine the Miller indices for the directions A, B, C and D shown in the following cubic unit cell PROBLEM 8: For a cubic unit cell, sketch the following directions a) b) c)...
View Full Document

Page1 / 3

HW2-new - shown in the following figure PROBLEM 5: Pure...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online