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Select any two from (i), (ii) or (iii) below and differentiate between the terms in each: (i) Amorphous solid structures and crystalline solid structures; (ii) Solvus and solidus; (iii) Body Centre Cubic (BCC) and Face Centre Cubic (FCC) structures. - Leaving Cert Engineering - Question c - 2017
Question c
Select any two from (i), (ii) or (iii) below and differentiate between the terms in each: (i) Amorphous solid structures and crystalline solid structures; (ii) Sol... show full transcript
Worked Solution & Example Answer:Select any two from (i), (ii) or (iii) below and differentiate between the terms in each: (i) Amorphous solid structures and crystalline solid structures; (ii) Solvus and solidus; (iii) Body Centre Cubic (BCC) and Face Centre Cubic (FCC) structures. - Leaving Cert Engineering - Question c - 2017
Step 1
Amorphous solid structures and crystalline solid structures;
Answer
Crystalline solid structures exhibit a regular and repeating atomic arrangement, which results in distinct geometric shapes and properties. These structures have well-defined melting points. In contrast, amorphous solid structures consist of atoms arranged randomly without a long-range order, which typically results in a lack of defined geometric form and a broader range of melting temperatures.
Step 2
Solvus and solidus;
Answer
The solvus line represents the boundary between a solid solution and a eutectic alloy in a phase diagram, indicating where dissolution of one phase into another occurs under varying temperature conditions. On the other hand, the solidus line delineates the end of solidification in an alloy, indicating the temperature below which a material is completely solid.