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Test your basic knowledge |
Modern Material Science And Engineering
Start Test
Study First
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. Tiny clusters of arranged atoms that serve as the frameworks for subsequent crystal growth
edge dislocations
Seed Crystal
slip
Nuclei
2. The process of forming small aligned clusters of atoms that serve as the framework for crystal growth
nucleation
Schottky Defect
Critical Resolved Shear Stress
HCP Hexagonal Close Packed
3. The direction that dislocation moves in
Schottky Defect
slip direction
dislocation line
Frenkel Defect
4. A mathematical representation of the magnitude and direction of distortions in a lattice caused by dislocations
Crystallites
bravais lattice
burgers vectors
Dislocations
5. The line extending along the extra partial plane of atoms in an edge dislocation
slip direction
grain growth
dislocation line
Seed Crystal
6. The 14 distinct crystals structure into which atoms arrange themselves in materials
interstitial defects
Extinction Conditions
bravais lattice
Critical Resolved Shear Stress
7. The first level of the structure of materials - describing the atoms present
Bragg's Equation
Schottky Defect
macrostructure
Atomic structure
8. Regions of a material in which atoms are arranged in a regular pattern
Crystallites
Schottky Defect
burgers vectors
Diffraction
9. A numerical quantity developed by the American Society for Testing and Materials (ASTM) to characterize grain sizes in materials
negative climb
slip planes
Dislocations form from three primary sources
grain size number
10. Lattice defects caused by the addition of a partial plane into an existing lattice structure
Scanning Electron Microscope SEM
edge dislocations
slip system
FCC Face Centered Cubic
11. The amount of the unit cell occupied by atoms as opposed to void space
Nuclei
Atomic Packing Factor APF
simple cubic
atomic arrangement
12. The use of light to magnify objects up to 2000 times
dislocation climb
optical microscopy
Atomic structure
boules
13. Lattice defect that occurs when the lattice is cut and shifted by a row of atomic spacing
BCC Body Centered Cubic
vacancies
nanocrystal
screw dislocation
14. Materials in which the entire structure is a single unbroken grain
dislocation climb
monocrystals
primary slip system
optical microscopy
15. 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
Frenkel Defect
Bragg's Equation
Full-Width Half- Maximun FWHM
nucleation
16. 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
FCC Face Centered Cubic
Scanning Electron Microscope SEM
boules
Dislocations
17. The ares of a material that separate different crystallite regions
mixed dislocations
destructive interference
Extinction Conditions
grain boundaries
18. The first set of panes in a material to experience slip under an applied stress
macrostructure
Atomic Packing Factor APF
primary slip system
grain size number
19. Large scale lattice defects that occur from alterations to the structure of the lattice itself
bravais lattice
Miller Indices
Dislocations
lattice parameters
20. Point defects that result when an atom in the lattice is replaced with an atom of a different element
substitional defects
Seed Crystal
atomic arrangement
Schottky Defect
21. Formula that relates interplaner spacing in a lattice to constructive interference of diffracted X- rays
22. Microscopes that focus a high- energy beam of electrons at the source and collect the back- scattered beam of these electrons
theoretical density
slip system
grain boundaries
Scanning Electron Microscope SEM
23. The third level of structure in materials - describing the sequencing of crystals at a level invisible to the human eye
microstructure
atomic arrangement
HCP Hexagonal Close Packed
screw dislocation
24. 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
lattice parameters
slip system
arrhenius equation
atomic arrangement
25. The size - shape - and arrangement of atoms in a three- dimensional lattice
crystal structure
amorphous materials
FCC Face Centered Cubic
yield stress
26. New planes formed after the material has undergone slip
mixed dislocations
dislocation line
slip planes
Crystallites
27. The movement of dislocations through a crystal - caused when the material is placed under shear stress
Transmission Electron Microscopy TEM
dislocation line
slip
atomic arrangement
28. 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
slip direction
FCC Face Centered Cubic
negative climb
microstructure
29. The equations used to determine the critical resolved shear stress in a material
30. The density a material would have if it consisted of a single perfect lattice
optical microscopy
theoretical density
Crystallites
grain boundaries
31. Clustering that occurs when a pure material cools sufficiently to self- support the formation of stable nuclei
monocrystals
boules
Schottky Defect
homogeneous nucleation
32. A numerical system used to represent specifics planes in a lattice
Miller Indices
HCP Hexagonal Close Packed
slip direction
Crystallites
33. The interaction of waves
Diffraction
constructive interference
vacancies
crystal mosaic
34. The increase in amplitude resulting from two or more waves interacting in phase
constructive interference
nanocrystal
arrhenius equation
Dislocations form from three primary sources
35. Point defects that result from the absence of an atom at a particular site
lattice parameters
dislocation climb
slip planes
vacancies
36. The smallest subdivision of a lattice that still contains the characteristics of that lattice
Extinction Conditions
unit cell
boules
destructive interference
37. The lowest stress level at which a slip will begin in the material
Transmission Electron Microscopy TEM
Extinction Conditions
lattice parameters
Critical Resolved Shear Stress
38. The fourth level of structure in materials - describing how the microstructures fit together to form the material as a whole
constructive interference
Dislocations form from three primary sources
macrostructure
screw dislocation
39. The edge lengths and angels of a unit cell; describes the sizes and shapes of the lattices
optical microscopy
dislocation line
lattice parameters
Bragg's Equation
40. The presence of both screw and edge dislocations separated by a distance in the same lattice
mixed dislocations
grain growth
Extinction Conditions
arrhenius equation
41. Materials whose order extends only to nearest neighbor atoms
yield stress
boules
Bragg's Equation
amorphous materials
42. Mechanism by which dislocations move in directions that are perpendicular to the slip plane
dislocation climb
Transmission Electron Microscopy TEM
monocrystals
interstitial defects
43. Composed of both the slip plane and the slip directions
dislocation line
slip system
Bragg's Equation
simple cubic
44. 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
Critical Resolved Shear Stress
Dislocations form from three primary sources
optical microscopy
HCP Hexagonal Close Packed
45. A means of relating the amount of spreading in a X- ray diffractogram to the thickness of the crystallites in the sample
Hall-Petch Equation
Scherrer Equation
vacancies
negative climb
46. 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
Crystallites
simple cubic
Frenkel Defect
dislocation climb
47. A hypothetical structure accounting for irregularities in the boundaries between crystallites
constructive interference
crystal mosaic
mixed dislocations
Diffraction
48. Provides a framework for the new atoms to follow in constructing a monocrystal
slip system
FCC Face Centered Cubic
Seed Crystal
amorphous materials
49. A point defect that occurs in ceramics when both a cation and an anion are missing from a lattice
boules
Schottky Defect
Scherrer Equation
homogeneous nucleation
50. Point defects that occur when an atom occupies a space that is normally vacant
mixed dislocations
Schottky Defect
interstitial defects
Full-Width Half- Maximun FWHM