Alloys
By Caroline Duesing
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Last updated about 4 years ago
11 Questions
Note from the author:
Assignment about types of alloys
Please watch the video below about alloys, then answer the questions below.
10
1.
Name the two types of alloys illustrated above.
Name the two types of alloys illustrated above.
10
2.
How is an alloy different from a pure metal?
How is an alloy different from a pure metal?
10
3.
Consider the two types of alloys. Based on the diagrams, define “substitutional” and “interstitial” in your own words.
Consider the two types of alloys. Based on the diagrams, define “substitutional” and “interstitial” in your own words.
5
4.
One of the alloys in Model 1 tends to form when elements with similar sized atoms are meltedtogether and allowed to cool. The other type forms when elements with very different sized atomsare combined. Match the descriptions below with each type of alloy.
One of the alloys in Model 1 tends to form when elements with similar sized atoms are melted
together and allowed to cool. The other type forms when elements with very different sized atoms
are combined. Match the descriptions below with each type of alloy.
| arrow_right_alt | Interstitial Alloy | |
| arrow_right_alt | Substitutional Alloy |
Solids are most stable when the arrangement of atoms in the crystal lattice minimizes bond
length, maximizes bond strength, and maximizes the number of atoms “touching” one another—
in other words, when the atoms fill the space most efficiently.
10
5.
Explain why an interstitial alloy would not form a stable crystal structure if the componentatoms were of similar size.
Explain why an interstitial alloy would not form a stable crystal structure if the component
atoms were of similar size.
10
6.
Sketch a diagram to illustrate your answer for question 5.
Sketch a diagram to illustrate your answer for question 5.
10
7.
Explain why a substitutional alloy would not form a stable crystal structure if the componentatoms were different sizes.
Explain why a substitutional alloy would not form a stable crystal structure if the component
atoms were different sizes.
10
8.
Sketch a diagram to illustrate your answer for question 7.
Sketch a diagram to illustrate your answer for question 7.
Consider how the density of an alloy might compare to the density of the original metals.
10
9.
Would substitutional alloys tend to have a density similar to, significantly greater than orsignificantly less than the pure metal?
Would substitutional alloys tend to have a density similar to, significantly greater than or
significantly less than the pure metal?
10
10.
Would interstitial alloys tend to have a density similar to, significantly greater than orsignificantly less than the pure metal?
Would interstitial alloys tend to have a density similar to, significantly greater than or
significantly less than the pure metal?
5
11.
Metals are malleable because of weak bonds between atoms. This allows planes of atoms to slidepast one another and into new positions. Some alloys retain their malleability while others becomemore rigid. Consider the diagrams above. Predict which type of alloy would result in a morerigid substance. Justify your reasoning.
Metals are malleable because of weak bonds between atoms. This allows planes of atoms to slide
past one another and into new positions. Some alloys retain their malleability while others become
more rigid. Consider the diagrams above. Predict which type of alloy would result in a more
rigid substance. Justify your reasoning.