Can steel pin of the pin on disk tribometer setup be used in doing wear rate testing of sintered Alumina??
You will be able to determine the coefficient of friction steel-Al2O3 and observe only steel wear from the pin. Al2O3 ceramic will not wear. Only with extremely high loads (10 N) and a weak, porous ceramic can the ceramic surface be damaged by the steel pin.
The steel pin will wear quickly. After a short test time, you will measure friction and wear of the steel pin sliding against worn steel transfer material adhering on the surface of the sintered alumina. This is a tribological situation where you measure the wear, sticking and oxidation tendency of the steel pin. Wear of alumina will play a very minor role.
Indeed Alumina will rapidly detroy the steel pin of your tribometer for sure.
No idea on what should be used to measure the wear of a sintered Alumina, perhaps Alumina itself or even Titanium nidride or diamond?
There is no such thing as a general wear rate of alumina. If you use a steel ball, you will be able to determine the wear rates of the steel-alumina tribo-pair (with the expected result that mainly the steel will be worn).
Ideally, pair the alumina disc with a pin made from a material that is similar to what it will be sliding against in the intended application. This will give you wear rates that are relevant to the actual use case.
Your requirement is assessing the wear rate of sintered alumina. There would be an application in mind which is prompting you to carry out the tribometry. Try to choose the counter-body (ball/pin), keeping the application in mind. Try to find out the counter-body in the actual application against which the sintered alumina component is interacting.
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