A.V. Tyunkov; Yu.G. Yushkov; D.B. Zolotukhin; E.M. Oks; D.A. Golosov; S.M. Zavadsky
Abstract
This paper demonstrates the possibility of nitriding of titanium by a forevacuum electron source. We present an original design of the experimental setup and the measurements of the tribological properties and elemental composition of the subsurface layer of the titanium experimental sample. Raster electron ...
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This paper demonstrates the possibility of nitriding of titanium by a forevacuum electron source. We present an original design of the experimental setup and the measurements of the tribological properties and elemental composition of the subsurface layer of the titanium experimental sample. Raster electron microscopy analysis of the nitride sample have demonstrated that titanium and nitrogen are found to be the main chemical elements; oxygen and carbon also present, though their total concentration does not exceed 6 wt. %. The thickness of the modified layer after a 75-minute long process of nitriding was about 8 µm. Wear resistance test of have shown that the nitrided sample has a 500 times less loss of the material as compared with the original titanium sample, meaning a times-fold increase of resistance to wear.
E.M. Oks; A.V. Tyunkov; Yu.G. Yushkov; D.B. Zolotukhin
Abstract
This paper presents a novel technique for producing alumina ceramic coatings based on the evaporation of an aluminum oxide target by an electron beam in the middle vacuum range (5-30 Pa). The evaporation of ceramics by the electron beam enables to attain a coating deposition rate of up to 0.3 µm/min, ...
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This paper presents a novel technique for producing alumina ceramic coatings based on the evaporation of an aluminum oxide target by an electron beam in the middle vacuum range (5-30 Pa). The evaporation of ceramics by the electron beam enables to attain a coating deposition rate of up to 0.3 µm/min, and thus consider this as a practical alternative to existing methods. A special attention is devoted to the study of the surfaces of obtained coatings. The X-ray fluorescence analysis of the deposited coating showed the presence in the coating of all the elements that contained in the ceramic target being evaporated. The coating has a substantially homogeneous surface without any prominent pores.