Term
|
Definition
| the net flux of atoms, ions or other species within a material caused by temperature and concentration gradient |
|
|
Term
|
Definition
| a temperature dependent coefficient related to the rate at which atoms, ions or other species diffuse, depends on temperature, the composition, and microstructure of the host material and also concentration of diffusing species |
|
|
Term
|
Definition
| a combination of elements involved in diffusion studies |
|
|
Term
|
Definition
| the equation realting the flux of atoms by diffusion coefficient and the concentration gradient |
|
|
Term
|
Definition
| diffusion of atoms along grain boundaries, this is faster than volume diffusion, because the atoms are less closely packed in grain boundaries |
|
|
Term
|
Definition
| diffusion of small atoms from one interstitial position to another in the crystal structure |
|
|
Term
|
Definition
| the random movement of atoms within an essentially pure material, no net change in composition results |
|
|
Term
|
Definition
| a high temperature treatment used to join small particles, diffusion of atoms to points of contact causes bridges to form between particules, further diffusion eventually fills in any remaining voids, the driving for is a reduction in the total sruface area of the powder particles |
|
|
Term
|
Definition
| diffusion of surfaces along surfaces such as cracks or particle surfaces |
|
|
Term
|
Definition
| diffusion of atoms when an atom leaves a regular lattice position to fill a vacancy in the crystal, this process creates a new vacancy and the process continues |
|
|
Term
|
Definition
| diffusion of atoms through the interior of grains |
|
|
