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Questions and Answers
What property is characterized by a material's resistance to deformation under an applied load?
What property is characterized by a material's resistance to deformation under an applied load?
- Electrical conductivity
- Elastic modulus (correct)
- Corrosion resistance
- Thermal expansion
Which of the following is a typical electrical property of materials?
Which of the following is a typical electrical property of materials?
- Thermal conductivity
- Magnetic susceptibility
- Mechanical strength
- Dielectric constant (correct)
What distinguishes ferrous metals from non-ferrous metals?
What distinguishes ferrous metals from non-ferrous metals?
- Ferrous metals have a higher thermal conductivity.
- Ferrous metals contain iron. (correct)
- Ferrous metals are more resistant to corrosion.
- Ferrous metals are more lightweight.
What is primarily affected by the processing of a material?
What is primarily affected by the processing of a material?
Which of the following properties relates to a material's reaction to temperature changes?
Which of the following properties relates to a material's reaction to temperature changes?
What characteristic describes a material's resistance to deterioration from environmental interactions?
What characteristic describes a material's resistance to deterioration from environmental interactions?
Which property is indicative of a material's response when exposed to a magnetic field?
Which property is indicative of a material's response when exposed to a magnetic field?
Which optical property relates to how light is bent when entering a material?
Which optical property relates to how light is bent when entering a material?
What is the primary function of thermoelectric materials?
What is the primary function of thermoelectric materials?
Which of the following materials change size or volume in response to external chemical influences?
Which of the following materials change size or volume in response to external chemical influences?
Which of the following materials is NOT included in the field of Advanced Materials Processes?
Which of the following materials is NOT included in the field of Advanced Materials Processes?
What type of composite is mentioned as part of advanced materials engineering?
What type of composite is mentioned as part of advanced materials engineering?
What are semi-conductors known for in terms of electrical properties?
What are semi-conductors known for in terms of electrical properties?
Which of the following is a characteristic of structural ceramics?
Which of the following is a characteristic of structural ceramics?
Which of the following best describes smart materials?
Which of the following best describes smart materials?
Which of the following applications is NOT typically associated with piezoelectric materials?
Which of the following applications is NOT typically associated with piezoelectric materials?
What effect occurs when stress is applied to piezoelectric materials?
What effect occurs when stress is applied to piezoelectric materials?
Which statement best describes the relationship between materials and technological advancements?
Which statement best describes the relationship between materials and technological advancements?
Which type of materials consist of metals and metal alloys that are known for their conductivity?
Which type of materials consist of metals and metal alloys that are known for their conductivity?
What property of semi-conductors makes them unique compared to conductors and insulators?
What property of semi-conductors makes them unique compared to conductors and insulators?
In metallic bonding, which statement is generally true?
In metallic bonding, which statement is generally true?
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Study Notes
Advanced Materials
- Advancements in computer technology, fiber-optic systems, spacecrafts, and military hardware utilize enhanced traditional materials.
Semiconductors
- Possess electrical properties intermediate between conductors (metals, alloys) and insulators (ceramics, polymers).
- Electrical characteristics are highly sensitive to minute impurity atom concentrations, controllable within small spatial regions.
Smart Materials
- A new class of materials responding to environmental changes in predetermined ways.
Piezoelectric Materials
- Generate voltage when stressed; conversely, applied voltage creates stress.
- Can bend, expand, or contract with applied voltage.
Material Properties
- Mechanical: Relate deformation to applied load (e.g., elastic modulus, strength, fracture resistance).
- Electrical: Response to electric fields (e.g., conductivity, dielectric constant).
- Thermal: Response to temperature changes (e.g., thermal expansion, heat capacity).
- Magnetic: Response to magnetic fields (e.g., susceptibility, magnetization).
- Optical: Response to light (e.g., refractive index, reflectivity).
- Deteriorative: Chemical reactivity (e.g., corrosion resistance).
Materials Selection Process
- Four components involved: design, production, utilization, and selection.
Material Processing
- Influences material structure.
Thermoelectric Materials
- Convert temperature differences into electricity and vice versa.
Chemoresponsive Materials
- Change size or volume due to external chemical or biological compounds.
Advanced Materials Processes
- Includes engineered polymers, resins; advanced fibers (carbon, Kevlar, sapphire); metal matrix composites; structural ceramics; ceramic composites; other composites; high-temperature alloys; specialty adhesives; specialty chemicals; powder metals; thin films; surface engineering; and nanotechnology.
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