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Modern Material Science And Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 found in ceramic materials that occurs when a cation diffuses onto an interstitial site on the lattice






2. A standard used to measure the spread in the peak of a diffractogram - measures at the intensity value corresponding to the half highest value in the peak






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






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






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






6. Large - artificially produced monocrystals






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






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


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






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






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






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






13. The second step in the formation of crystallites - which is dependent on temperature and can be described using the arrhenius equation






14. A specific set of h






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






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






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






18. The direction that dislocation moves in






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






20. Crystallite materials with sizes of nanometers in length






21. The interaction of waves






22. 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






23. 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






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






25. Materials in which the entire structure is a single unbroken grain






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






27. Regions of a material in which atoms are arranged in a regular pattern






28. 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






29. Large scale lattice defects that occur from alterations to the structure of the lattice itself






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






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






32. A point defect that occurs in ceramics when both a cation and an anion are missing from a lattice






33. 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






34. The distance between repeated planes in a lattice






35. For a slip to occur - a sufficient amount of stress must be applied to permanently deform the material






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






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






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






39. 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






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






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






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






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






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






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






46. 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






47. The line extending along the extra partial plane of atoms in an edge dislocation






48. New planes formed after the material has undergone slip






49. Materials whose order extends only to nearest neighbor atoms






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