Materials Exam 1 Definitions
% Ionic
%(ionic) = 1-e^(-0.25∆E^2)
Central theme of material sceince and engineering (MSE)
Think about the triangle
Covalent bonds
Usually 2 non metals Not ductile becasue they are ordered bonds
Mixed bond
When both metallic and ionic bonds are mixed
Ionic Bond
bond formed between metal and non metal. Diff in electronegativity causes attraction
Metallic bonds
bonds formed between one or two free electrons of each atom. This sea of electrons NOn directional, which makes for ductile materials.
Physical properties
color, elasticity, conductivity, magnetism, optical behavior Stuff not impacted when a force is applied
Materials engineering
designing or engineering the structure of a material to produce a predetermined set of properties. Transform materials to useful device or structure
Metals/alloys properties
ductile, electrical, thermal conductivity, high strength, stiff, easily corroded
Cermaics properties
formed by metallic and nonmetallic elements. Ionic bonds or mixed or covalent bonds. High compressive strengths but brittle High melting temp Bad conductivity so they act like insulator
Coefficient of thermal expansion (CTE)
fractional change in linear dimension of material per degree of temperature change
Hydrogen bonds
interaction between O, N, or F and a H bonded to O, N, or F
permanent dipole interactions
interactions between compounds with unequal charge distribution in a covalent bond
MSE
is an interdisciplinary field that studies and manipulates the composition and structure of materials across length scales to control materials properties through synthesis and processing.
Properties
material trait in terms of the kind and magnitude of response to an imposed stimulus
Induced dipole interactions
random fluctuation in electron distribution
Processing
referes to how an object is prepared or made
Materials science
relationships that exist between the structures and properties of materials. Field of science that emphaseizes relationships between the microstructure, synthesis and processing, and properties of materials.
Mechanical properties
strength , both tensile or compressive forces, impact, high temp forces
Strucutre
the arrangment of a material's internal components
