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The best hardness values of the thin film composites, measured using nanoindentation techniques, were found to be 20 30% larger than pure alumina films fabricated under identical conditions.
Due to increase in the diffusion rate of nitrogen in plasma atmosphere, the best hardness and wear properties were obtained in a short period of one hour.
Particularly, the surface composite fabricated with Ti+B4C powders had a larger volume fraction of TiB and TiC homogeneously distributed in the martensitic matrix, and thus showed the best hardness even at high temperatures.
Best hardness values were found for Si content in the range 4 10 at.%. Almost all samples showed high critical loads for total adhesion failure, generally higher than 80 N, although the critical load for the first adhesion failure was found to be lower than 20 N for several samples.
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The sample treated at 7 torr showed the best result of hardness.
Suggesting that aggression is the only appropriate existential response to the demands of restaurant cooking — that hardened hands and focus are best matched with hardness throughout one's life — he simulates teaching sophistication, then teaches solipsism.
The work concludes by identifying the effect of cryogenic processing and optimizing the treatment parameters for getting best combination of hardness and surface roughness after the processing.
The composition range from 19.9 to 32.5 at.% of Al was selected for further work since it includes the films that presented the best combination between hardness and friction coefficient.
The highest intensity of CrN 200) preferential orientation, best adhesion and hardness is obtained by HPPMS plasma source for the highly energetic ion implantation and bombardment, but the C fraction is a little higher since the sputtering of highly energetic ions.
However, these films present relatively low adhesion to the substrates with critical loads of 30 N. The best compromise between hardness and adhesion was reached for W Ti N films with low nitrogen and titanium contents.
The best compromise between hardness and toughness was observed for the CP1 composite, although the phase composition shows the highest amount of fragile carbides, ~ 14 wt.% of carbides (M,W 4C and (M,W 6C.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com