Crystal Structures (Leaving Cert Engineering): Flashcards
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Practise the cards
14 cards from this deck
What is a crystal?
What is a crystal?
Solid with atoms in organized, patterned layout
What are the 3 main crystal structures in metals?
What are the 3 main crystal structures in metals?
BCC, FCC, CPH
How many atoms in BCC?
How many atoms in BCC?
9 atoms
Is BCC loose or close packed?
Is BCC loose or close packed?
Loose packed
Which steel type has BCC structure?
Which steel type has BCC structure?
Ferrite
How many atoms in FCC?
How many atoms in FCC?
14 atoms
Is FCC more or less packed than BCC?
Is FCC more or less packed than BCC?
More closely packed
Which steel type has FCC structure?
Which steel type has FCC structure?
Austenite
How many atoms in CPH?
How many atoms in CPH?
17 atoms
How packed is CPH?
How packed is CPH?
Very close packed
Which metal has CPH structure?
Which metal has CPH structure?
Brass
What is slip in metals?
What is slip in metals?
Layers of atoms sliding over each other
Which crystal structures allow easy slip?
Which crystal structures allow easy slip?
FCC and CPH (tightly packed)
What property results from slip?
What property results from slip?
Ductility (can stretch without breaking)