1.1 Revise material classification
Engineering Materials and their Properties
1500 words
1.1 Revise material classification
- This section of the report should include:
- A description of the four main categories into which materials can be placed.
- A description of the physical and mechanical properties that materials in these categories possess.
- In each category give an example material, define its properties and give a practical engineering application in which the material is used and a reason why the material was chosen for this purpose
1.2 Examine atomic structure
This section of the report requires you to:
- Using the Bohr model of an atom, show how one atom of phosphorus can be represented and give its electron configuration.
- Explain how the three types of primary bonding in materials occur, in each instance given an example of two materials bonding in this way.
- determine the number of covalent bonds that are possible for atoms of carbon.
1.3 Explore atomic arrangements
This section of the report requires you to:
- Explain what is meant by BCC, FCC and CPH crystal lattice structures.
- For each type of lattice structure give an example material that has this structure and describe the properties this material exhibits.
- Explain what is meant by the atomic packing factor and show that FCC has a higher atomic packing factor than BCC structures. 1.1 Revise material classification
1.4 Assess imperfections in the atomic arrangement
This section of the report requires you to:
- Explain what is meant by a dislocation in terms of defects in atomic arrangement.
- Describe two types of dislocation defects within materials.
- Give examples of three types of interfacial defects in materials.
1.4 Analyse movement of the atomic structure by diffusion
This section should be completed as a separate short report and should contain at least 750 words
This short report requires you to:
- Provide a description of the process of diffusion and the various mechanisms by which diffusion takes place in materials.
- Explain which factors can affect the diffusion rate in materials and provide an analysis of how changing these variables impact the rate of diffusion.
- A plate of iron is exposed to a carburising atmosphere on one side and a decarburizing atmosphere on the other side at 700◦C. If a condition of steady state diffusion is achieved, calculate the diffusion flux of carbon through the plate if the concentrations of carbon at positions of 4 and 9 mm beneath the carburizing surface are 1.5 and 0.6kgm〖^(-3)〗, respectively.
- Assume a diffusion coefficient of 2.8×10〖^(-11)〗m〖^2〗s〖^(-1)〗at this temperature. 1.1 Revise material classification
1.5 Investigate the practical applications of diffusion in processing material
Engineering Materials and their Properties
This section should be completed as a separate short report and should contain at least 1000 words
- This short report requires you to:
- Investigate and describe two engineering processes that require diffusion to take place.
- Your description of the processes should include an overview of the process, including equipment and example materials used.
- Within your investigation state how the parameters affecting the rate of diffusion can be altered and the impact this has on the process
