CHEM ENG 1009/1009UAC/TECH 2002 Materials 1 Part A Assignment 2
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CHEM ENG 1009/1009UAC/TECH 2002 Materials 1 Part A
Assignment 2 (Group)
Multiple Choice Section [Total = 10 Marks]
Please circle the correct answer using a pen. There is only one correct answer per question.
1. (2 Marks) A solid in which the atoms lack a systematic and regular arrangement of atoms is said to be:
a) Crystalline
b) Amorphous
d(c) Polymorphic
2. (2 Marks) The total number of atom(s) per unit cell for a simple cubic unit cell is:
One
Two
Four
d) Eight
3. (2 Marks) The way in which FCC and HCP structures fundamentally differ is…
a) Atomic Packing Factor
Coordination Number
c) No. of Atoms in Each Unit Cell
d) FCC does not diffract X-rays.
4. (2 Marks) The interplanar spacing for an unknown metal with a diffraction angle 2θ = 31.57º obtained by using monochromatic x-ray radiation having a wavelength of λ = 0.0711 nm for first-order diffraction is:
a) 0.0679 nm
b) 0.131 nm
c) 0.261 nm
d) 1.31 nm
5. (2 Marks) The Miller indicies of the crystallographic plane pictured below is:
a) (1 0 1)
b) (1 1 2)
c) (0 0 1)
d) (0 1 2)
Long Answer Section [Total = 20 Marks]
6. (6 Marks) Below are listed the atomic weight, density and atomic radii for three hypothetical metal alloys. For each alloy, determine with calculations whether its crystal structure is FCC or BCC.
Alloy |
Atomic Weight (g/mol) |
Density (g/cm3) |
Atomic Radius (nm) |
1 |
51.74 |
8.57 |
0.121 |
2 |
103.9 |
13.7 |
0.127 |
3 |
162.8 |
18.7 |
0.133 |
7. (2 Marks) Draw the following directions within a cubic unit cell. You may use more than one cell to show the directions, but ensure you label all vectors.
a) [0 0 1]
b) [1 0 1]
c) [2 1 0] d)
8. (3 Marks) Draw the following planes within a cubit unit cell. Draw each plane within a new cell.
a) (0 1 0)
b) (0 1 1)
c) (2 0 1)
d) (1 1 1)
e) (2 2 2) f)
9. (6 Marks) A sample of vanadium (V, a medium-hard,ductile, steel-blue metal with an atomic radius of 0.132 nm) has a BCC crystal structure.
a) Show that the linear density expression for vanadium in the [1 0 0] direction is:
Where R is the atomic radius.
[2 Marks]
b) Hence, compute the [1 0 0] linear density expression. You must include units in your answer, and your units must be in terms of nanometres.
[ 1 Mark]
c) Compute the (1 1 0) planar density expression for vanadium, giving your answer in terms of nanometres.
[3 Marks]
10. (3 Marks) X-ray diffraction was carried out on a sample of platinum (Pt, a silverish-white metal with an atomic radius of 0.139 nm) with an FCC structure, revealing an interplanar spacing of 0.131 nm. Provide two examples of Miller Indicies that could result in this spacing.
Mini Case Study on Materials in Our Life [Total = 5 Marks]
Aim: To be curious about and familiar with materials applied in our life by submitting PPT A4 landscape slides with one of topics below:
Materials in Tokyo 2020/21 Recycled e-Waste Olympics Medals
Materials in Apollo 11 Eva 1969 for Moon Landing
Materials in Airbus 380
Materials in Boeing 787 Dreamliner
Materials in Skylab
Materials in Your Kitchen
Materials in Tennis Balls at Wimbledon
Materials in Trash Bins at the University of Adelaide
Materials in Apple iPhone
Materials in BMW Gina
Materials in Submarine Suffren
Materials in HP EliteOne
Materials in Laparoscopic Robotic Surgery Machine: the da Vinci Surgical System Materials in Stratesys 3D Printing Machines
Materials in the World's Tallest Artificial Structure (829.8-metre-tall) Buri Khalifa in Dubai Materials in Your Bicycles
Materials in any devices that you are interested in
How it Works: Each group works as a team for the case study.
Your slides should include Title Slide (Project Title, Team Names & IDs) and Reference Slide.
Each group submits N+2 slides (including Title Slide and Reference Slide) mixed with figures and descriptions, where N is the number of students in the group.
You are not encouraged to provide more slides than the required number for each group because all professional presentations are strictly time-limited or page-limited. If your group has submitted more slides than the required, we will mark only the required number of slides, i.e., extra slides will not be marked.
The reference slide should follow the Harvard reference style, which information can be linked at https://uamediaprod.github.io/referencing-guide/.
Marking Criteria:
Technical Contents: 3 marks (Device function 1 mark + Key material description 2 marks) Visual Impact & Formatting: 1 mark
References: 1 mark (Formatting 0.5 marks) + citation 0.5 marks)
2022-09-05