HW3_Solutions_MSE2001

HW3_Solutions_MSE2001 - HOMEWORK CHAPTER 3 PART A....

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: HOMEWORK CHAPTER 3 PART A. DEFINITIONS/NOMENCLATURE (5 POINTS 1 POINT EACH) 1. When hard spheres are packed in arrangements to form a BCC (Body Centered Cubic) structure, atoms touch along the <111> family of directions. 2. The hard sphere, FCC (Face Centered Cubic) structure has the same packing density as what other close-packed structure? HCP . 3. A lattice together with its basis is referred to as the crystal structure . 4. When properties of a material are independent of direction, the material is said to be isotropic . 5. Fluids that show some degree of long range order are called liquid crystals . PART B. CIRCLE THE APPROPRIATE ANSWER (5 POINTS 1 POINTS EACH) 1. There may be more than one atom at each lattice point. 2. Diffusion along a grain boundary has a lower activation energy than does bulk diffusion. 3. Diffusion of carbon in BCC form of iron is higher than in the FCC form of iron. 4. The hard sphere packing in the HCP structure is the same as in the hard sphere FCC structure. 5. There is 1 atom per lattice point in FCC nickel. PART C. CONCEPTS / SHORT ANSWER (60 POINTS AS MARKED) (10 Points) 1. Compare the activation energies for bulk and grain boundary diffusion. Compare the activation energies for bulk and grain boundary diffusion....
View Full Document

Page1 / 8

HW3_Solutions_MSE2001 - HOMEWORK CHAPTER 3 PART A....

This preview shows document pages 1 - 4. Sign up to view the full document.

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