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Modern Material Science And Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A point defect that occurs in ceramics when both a cation and an anion are missing from a lattice






2. Correlation used to estimate the yield strength of a given material - based on grain size






3. Materials whose order extends only to nearest neighbor atoms






4. The movement of dislocations through a crystal - caused when the material is placed under shear stress






5. Lattice defects caused by the addition of a partial plane into an existing lattice structure






6. An electron microscope that passes the electron beam through the sample and used the difference in the beam scattering and diffraction to view the object






7. A bravais lattice that has one atom in each of the 8 corners of the unit cell; less common than the other two cubic forms






8. The density a material would have if it consisted of a single perfect lattice






9. Homogeneous nucleation: grain boundaries: lattice/surface interactions:






10. A flaw in the structure of a material that occurs at a single site in the lattice - such as vacancies - substitutions - and interstitial defects






11. Generalized equation used to predict the temperature dependence of various physics properties






12. The systematic reduction in intensity of diffraction peaks from specific lattice planes






13. The lowest stress level at which a slip will begin in the material






14. Tiny clusters of arranged atoms that serve as the frameworks for subsequent crystal growth






15. Provides a framework for the new atoms to follow in constructing a monocrystal






16. Crystallite materials with sizes of nanometers in length






17. Large - artificially produced monocrystals






18. The clustering of atoms around an impurity that provide a template for crystal growth






19. Lattice defect that occurs when the lattice is cut and shifted by a row of atomic spacing






20. The first level of the structure of materials - describing the atoms present






21. Formula that relates interplaner spacing in a lattice to constructive interference of diffracted X- rays

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22. Point defects that occur when an atom occupies a space that is normally vacant






23. The distance between repeated planes in a lattice






24. The 14 distinct crystals structure into which atoms arrange themselves in materials






25. The amount of the unit cell occupied by atoms as opposed to void space






26. The use of light to magnify objects up to 2000 times






27. Most common of the non - cubic bravais lattices; having six atoms forming a hexagon on both the top and bottom and a single atom positioned in the center - between the two hexagonal rings






28. One of the bravais lattices that has one atom in each of the 8 corners of the unit cell and one atom on each face of the unit cell






29. The process of forming small aligned clusters of atoms that serve as the framework for crystal growth






30. The presence of both screw and edge dislocations separated by a distance in the same lattice






31. Microscopes that focus a high- energy beam of electrons at the source and collect the back- scattered beam of these electrons






32. The ares of a material that separate different crystallite regions






33. The increase in amplitude resulting from two or more waves interacting in phase






34. A mathematical representation of the magnitude and direction of distortions in a lattice caused by dislocations






35. The first set of panes in a material to experience slip under an applied stress






36. The size - shape - and arrangement of atoms in a three- dimensional lattice






37. The edge lengths and angels of a unit cell; describes the sizes and shapes of the lattices






38. A numerical system used to represent specifics planes in a lattice






39. The filling of a vancacy in the partial plane of an edge dislocation by an adjacent atom resulting in a shrinking of the crystal in the direction perpendicular to the partial plane






40. Point defects that result when an atom in the lattice is replaced with an atom of a different element






41. One of the bravais lattice that contains one atom in each corner of the unit cell as well as one atom in the center of the unit cell






42. Mechanism by which dislocations move in directions that are perpendicular to the slip plane






43. A means of relating the amount of spreading in a X- ray diffractogram to the thickness of the crystallites in the sample






44. The fourth level of structure in materials - describing how the microstructures fit together to form the material as a whole






45. Point defects that result from the absence of an atom at a particular site






46. Clustering that occurs when a pure material cools sufficiently to self- support the formation of stable nuclei






47. A nullification caused by two waves interacting out of phase






48. The second level of the structure of materials - describing how the atoms are positioned in relation to one another as well and the type of bonding between them






49. The equations used to determine the critical resolved shear stress in a material

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50. The smallest subdivision of a lattice that still contains the characteristics of that lattice