Nanoindentation Lab Data
Feel free to email Adrian (gurga@drexel.edu) about your nanoindentation questions.
Group 1 studied polycrystalline silicon carbide.
Group 2 studied a composite of kynar and carbon nanotubes.
Group 3 studied a composite of polyvinylidene fluoride and carbon nanotubes.
Group 4 and 5 studied a coating of deposited aluminum oxide.
Group 6 studied single crystal silicon carbide.
Group 7 studied a coating of aluminum oxide deposited in the presence of nanodiamonds.
Group 8 studied a composite of polyacryl nitride and nanodiamond.
Group 9 studied a coating of carbide-derived carbon on silicon carbide.
Group 1 / Nanoindentation
Group 1 / Nanoindentation Group 2 / Nanoindentation
Group 3 / Nanoindentation
Group 4-5 / Nanoindentation
Group 6 / Nanoindentation
Group 7 / Nanoindentation
Group 8 / Nanoindentation
Group 9: data collection error - please select and use the data of any other group (mention in your lab report)
Message from Adrian:
Students only have to report on their own group's data but are encouraged to compare their results to those of other groups.
The data for groups 6-9 is still being collected and should be posted sometime this weekend. If need be, please remember much of the lab report can be written without your group's data.
The data for groups 6-9 is still being collected and should be posted sometime this weekend. If need be, please remember much of the lab report can be written without your group's data. ----------------------------------------------------------------------------------------------------------
The data includes a table of the machines calculated values as well as load displacement data for each indent. Remember you are expected to manually calculate hardness for one indent. Your lab report should explain the basics of indentation as well as the material your group studied with the conditions used for indentation.
When calculating hardness, you will need to calculate contact area from displacement.
For Berkovich indenters:
A ~= 24.5 * h^2
For Spherical indenters:
A ~= Pi*(2*R*h-h^2)
where A is area, h is displacement and R is radius remember to be careful with your units!
Your calculation should be within an order of magnitude of the computer's, but don't be alarmed if its not the same, the machine estimates contact area a different way.