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This study focused on developing a beneficial nitriding process for use on Ti-6Al-4V alloy surfaces, involving surface mechanical attrition treatment (SMAT), which does not contaminate the existing nanocrystalline layer. The average grain size of this layer was refined to 10 nm with random crystallographic orientation. Differential scanning calorimetry confirmed that the recrystallization temperature...
A novel CNT-cathode ionization gauge was developed in this work, and its vacuum metrological characteristics in different gases were studied systematically. A good measurement linearity between normalized ion current and gas pressure is achieved from 10−8 to 10−4 Pa in N2, H2, O2 and air, respectively, and the linear response region for He only lies in the range from 10−7 to 10−4 Pa. The lowest measureable...
This paper presents an investigation of carbon nanotube (CNT) emitter-based ionization gauge. The metrological performances of this CNT emitter-based ionization gauge were investigated and studied by numerical and experimental methods. The electron source was constructed with multi-wall nanotubes (MWNT), which were grown on stainless steel substrate using thermal chemical vapor deposition (CVD) technique...
In this paper, Cr-doped DLC films with various Cr contents were deposited on stainless steel plates by an ion beam deposition/magnetron sputtering hybrid method and the tribological performance of the samples was evaluated using a ball-on-disk tribometer. It was found that the influence of the Cr content in the Cr-doped DLC films on the friction coefficient when lubricated by PAO, 150SN, PAO + T307,...
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