Difference between revisions of "Diffusion"

Revision as of 12:01, 13 December 2023

Desired diffusion

Diffusion transport facilitating self assembly.
Important for the incremental path.
Already placed parts sometimes coming loose again is often desirable such that errors can be fixed.
Related: Kinetic traps

Undesired diffusion

Once assembled correctly one want's things to stick together as they are ans stay that way.
Especially in direct path to gem-gum-tec.

This is not so the case for pure metals and metallic alloys under specific circumstances.
Specifically metal atoms like to diffuse …

• when there is an individual atom alone atop a surface
• at grain boundaries and at crystal defects where there are high strains and low transition energy barriers
• at non-cryogenic temperatures

This is one reason for why gem based APM focuses gemstone-like compounds rather than pure metals and metallic alloys.
These materials avert surface diffusion at room temperature.
Other reasons are

• circumventing the problem of oxidation
• their mechanical weakness compared to top gems
• their irreversible ductility (no clean binary detectible breaks)

Relates

• Diffusion transport
• Diffusion slowdown blockade
• Self assembly
• Pure metals and metallic alloys