Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 4.8, Problem 32AAP
Calculate the size (radius) of the critically sized nucleus for pure platinum when homogeneous nucleation takes place.
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Calculate the fraction of atom sites that are vacant for copper at its melting
temperature of 1084degC. assume an energy vacancy formation of
0.90eVlatom. *
6.56 x 10^-5
O 0.9992
O 4.56 x 10^-4
O 2.19 X 10^-4
Calculate the number of atoms in a critically sized nucleus (,) for the
homogeneous nucleation of pure platinum (Assume FCC unit cell). (
(a) Describe with illustration, TWO (2) possible point defects that can occur in
metal alloying elements.
(b) Nickel and boron are to be diffused into an FCC iron metal during surface
treatment. The diffusion process begins at the same time for both nickel and
boron atoms.
Identify with justification which metal atom diffused at a higher rate during
the process.
Table 2: Atom and crystal characteristic
Atomic radius Crystal Structure Electronegativity
Element
Ni
0.1246
FCC
+2
0.085
Rhombohedral
+3
Fe
0.124
FCC
+2
C
0.071
НСР
+4
Chapter 4 Solutions
Foundations of Materials Science and Engineering
Ch. 4.8 - Prob. 1KCPCh. 4.8 - Define the homogeneous nucleation process for the...Ch. 4.8 - In the solidification of a pure metal, what are...Ch. 4.8 - In the solidification of a metal, what is the...Ch. 4.8 - During solidification, how does the degree of...Ch. 4.8 - Distinguish between homogeneous and heterogeneous...Ch. 4.8 - Describe the grain structure of a metal ingot that...Ch. 4.8 - Distinguish between equiaxed and columnar grains...Ch. 4.8 - How can the grain size of a cast ingot be refined?...Ch. 4.8 - Prob. 10KCP
Ch. 4.8 - Prob. 11KCPCh. 4.8 - Prob. 12KCPCh. 4.8 - Distinguish between a substitutional solid...Ch. 4.8 - What are the conditions that are favorable for...Ch. 4.8 - Prob. 15KCPCh. 4.8 - Prob. 16KCPCh. 4.8 - Prob. 17KCPCh. 4.8 - Prob. 18KCPCh. 4.8 - Describe the structure of a grain boundary. Why...Ch. 4.8 - Describe and illustrate the following planar...Ch. 4.8 - Prob. 21KCPCh. 4.8 - Describe the optical metallography technique. What...Ch. 4.8 - Prob. 23KCPCh. 4.8 - Prob. 24KCPCh. 4.8 - Prob. 25KCPCh. 4.8 - Prob. 26KCPCh. 4.8 - Prob. 27KCPCh. 4.8 - Prob. 28KCPCh. 4.8 - Prob. 29KCPCh. 4.8 - Prob. 30KCPCh. 4.8 - Prob. 31KCPCh. 4.8 - Calculate the size (radius) of the critically...Ch. 4.8 - Prob. 33AAPCh. 4.8 - Prob. 34AAPCh. 4.8 - Calculate the number of atoms in a critically...Ch. 4.8 - Prob. 36AAPCh. 4.8 - Prob. 37AAPCh. 4.8 - Prob. 38AAPCh. 4.8 - Prob. 39AAPCh. 4.8 - Prob. 40AAPCh. 4.8 - Prob. 41AAPCh. 4.8 - Prob. 42AAPCh. 4.8 - Determine, by counting, the ASTM grain-size number...Ch. 4.8 - Prob. 44AAPCh. 4.8 - For the grain structure in Problem 4.43, estimate...Ch. 4.8 - Prob. 46AAPCh. 4.8 - Prob. 47SEPCh. 4.8 - Prob. 48SEPCh. 4.8 - Prob. 49SEPCh. 4.8 - Prob. 50SEPCh. 4.8 - In Chapter 3 (Example Problem 3.11), we calculated...Ch. 4.8 - Prob. 52SEPCh. 4.8 - Prob. 53SEPCh. 4.8 - Prob. 54SEPCh. 4.8 - Prob. 55SEPCh. 4.8 - Prob. 56SEPCh. 4.8 - Prob. 57SEPCh. 4.8 - Prob. 58SEPCh. 4.8 - Prob. 59SEPCh. 4.8 - Prob. 60SEPCh. 4.8 - Prob. 61SEPCh. 4.8 - Prob. 62SEPCh. 4.8 - Prob. 63SEPCh. 4.8 - Prob. 64SEPCh. 4.8 - Prob. 65SEPCh. 4.8 - Prob. 66SEP
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- Compute the radius of an octahedral interstitial site in FCC iron (in nm)arrow_forwardSchottky Defect Frenkel Defect Name four methods used for strengthening of metals. What is the common principle that these methods rely on to make a metal stronger. 2. For the data given below a) Calculate the number-average molecular weight of polypropyl carbon are 1.008 and ns? Atomic weights of hydrogen andarrow_forward6- Determine the minimum radius of an atom that will just fit into (a) The tetrahedral interstitial FCC nickel, lattice parameter: 0.35167 nm (b) The octahedral interstitial site in BCC lithium, lattice parameter: 0.35089 nmarrow_forward
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