MSE
Wear rate ranking
■MSE wear rate
New index on evaluate material properties.
MSE wear rate is originated from MSE test method that can be use for indexing material wear rate.
The MSE test method itself has been developed by the collaboration work between Palmeso. Co., ltd. and Fukui University. With MSE wear rate indexing, material wear strength can easily be measure in less time.
MSE wear rate is different from the hardness that is useful to evaluate materials.
From the evaluation of wear rate, some industrial tool operating life can
be predict and the examination of wear resistance effect of such as touch
panel or solar cell surface can also be realized.
Especially, for precise evaluation of hard coated thin films such as DLC
(diamond-like carbon).
■Wear rate ranking
（Graph wide view）
MSE test method can be use widely to evaluate the wear rate of materials,
from hard material to soft material such as plastic.
From the test results shown in left chart, it is shown that DIA ceramic
hold the highest wear strength(0.0003 µm/g of wear rate) while Si substrates
hold the lowest wear strength with 6.36 µm/g in wear rate.
Each of this material will be explain in each topic below.
■Commercially coated chip wear rate ranking
The MSE wear rate measurement has been carried out at the surface
of coating films of coated cutting tool chip that is commonly available
in the market.
MSE test method feature, wear progression from generated nano-size wear erosion, one can evaluate coating films surface without damaging base material.
The spot on the tool are wear scar after the test is shown in the picture. The spot has been measured and MSE wear rate has been calculated.
Result,
A ranking of the measured MSE wear rate shows that, the differences of MSE wear rate are clear according to the differences of industrial tool form by CVD coating, PVD coating, purpose of chip and also the differences of each coating machine.
This MSE wear rate is a one spot on the coating film, as for evaluating industrial tool in overall, one can determine it by combining the base material strength.
（Graph wide view）
■Commercially DLC coated end mill wear rate ranking
Same as commercially coated cutting chip, 6 different type of DLC coated end mill which is DLC coating part has been measured. The picture below shows the result after the measurement been conducted.
Result.
DLC coating has lower MSE wear rate at 0.002 µm/g and higher MSE wear rate at 0.018 µm/g. A digit margin between the higher and the lower wear rate measured by MSE wear rate that proved the accuracy of wear strength through MSE test.
（Graph wide view）
■Plastic type material wear rate ranking
MSE test method features evaluation of hard coated material and also thin
coated films. With this technology, a soft material such as plastic type
material can also be evaluates. MSE wear rate at 6.36 µm/g for Si substrate
and 1.33 µm/g of Chloroprene rubber have been measured.
Compare with Si substrate, wear rate of different kind of rubber materials
is lower.
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