Ch 1 and 2 Flashcards
Composition
Chemical makeup of a material
Structure
Arrangements of atoms at different levels of detail
Synthesis
How materials are made
Processing
How materials are shaped
Stress
Force/Area
Strain
Change in length/original length
Crystalline
Atoms arranged in a periodic fashion
Amorphous
Atom arrangement that does not have long-range order
Single crystals
Crystalline materials consisting of a single crystal
Polycrystalline
Crystalline materials consisting of many grains or crystals
Atomic structure
0.1 nm, diamond-coated cutting tools, C-C covalent bonds are strong, hard, and wear resistant
Short-range order
0.1 to 1 nm, silica optical fibers, amorphous (only short-range order)
Long-range order
10 nm to 1 cm
Nanostructure
1-100 nm
Microstructure
0.1-100 micrometers
Macrostructure
Greater than 100 micrometers, thick coatings for aesthetics and corrosion resistance
Atomic number
Number of protons
Atomic mass
Total mass of the number of protons and neutrons in the atom (the stuff in the middle)
Three types of primary bonds
Metallic, covalent, and ionic
Secondary bonding
van der Waals bonds, when within one atom you have positive and negative charges, so it “distort” the material and creates a secondary bond with surrounding neutral materials
Covalent bonds re electrons
Sharing of electrons
Ionic bonds re electrons
Transfer of electrons