Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 1, Problem 4RQ
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Explain the reason: Iron is listed as having both a bcc and an fcc structure in the tables showing structures of crystal.
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a. For a FCC crystal, list all the planes in the {1 2 1} family. b. Would you expect a family in a face-centered orthorhombic (FCO) crystal to have more or fewer planes than the same family in a FCC crystal? Explain your answer.
Calculate the radius of a palladium (Pd) atom, given that Pd has an FCC crystal structure, a density of 12.0 g/cm3 , and an atomic weight of 106.4 g/mol.
What is the angle between the [200] and [200] directions in a lead with an FCC crystal structure?
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- If the atomic radius of lead, which has an FCC crystal structure, is 0.175 nm, calculate the volume of its unit cell in cubic meters.arrow_forwardIf the atomic radius of a metal that has the facecentered cubic crystal structure is 0.137 nm,calculate the volume of its unit cell (in nm3).arrow_forwardIf the atomic radius of a metal that has the facecentered cubic crystal is 0.137 nm , calculate the volume of its unit cell (in nm3)arrow_forward
- Determine the possible crystal structure of Zinc Blende structure (ZnS), if the radii are as follows Zn+2 = 0.074 and S-2 = 0.184.arrow_forwardf21 For BCC iron, calculate the diffraction angle for the (220) set of planes. The lattice parameter for Fe is 0.2866 nm. Assume that monochromatic radiation having a wavelength of 0.1790 nm is used, and the order of reflection is 1.arrow_forwardIn BCC crystal system, write down the number of tetrahedral sites that could exist only in one face in the cellarrow_forward
- Of BCC and FCC crystal structure, which one would expect to have a higher packingfactor and why?arrow_forwardCalculate the fraction of vacant lattice sites for pure copper at 1080oC. The value of the activation energy to create a vacancy in copper is 0.90 eV, its density is 8.94 g/cm3 and its melting point is 1085oC.arrow_forwardIf the atomic radius of a metal that has the face centred cubic (FCC) crystal structure is (3.70x10^-1) nm, calculate the volume of its unit cell (in nm^3).arrow_forward
- Given that molybdenum (Mo) with atomic weight 95.94 g/mol and density 10.2 g/cm3 assumes a body-centered cubic (BCC) crystal structure, estimate its atomic radius in pm.arrow_forwardExplain why martensite is hard? What is the crystal structure of martensite? Show the positions of carbon atoms in unit cell of martensite.arrow_forwardSketch the lattice planes in cubic crystal using Miller indices for (-200), (-1-20) and (302) planesarrow_forward
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