کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1663467 | 1008469 | 2005 | 6 صفحه PDF | دانلود رایگان |
TiN and Ti1−xAlxN coatings were deposited on Al substrates using the plasma immersion ion implantation and deposition technique, employing a filtered Ti and Ti0.5Al0.5 cathodic arc in a nitrogen atmosphere. Negative pulsed bias voltages between 0 to −4.0 kV were applied with varying duty cycles, at a constant time-averaged bias. Stress measurements using X-ray diffraction reveal an increase and then a decrease in the intrinsic compressive stress at increasing on-time bias, more pronounced for Ti1−xAlxN coatings. A bias dependent preferred orientation is observed for both the coatings, with [200] being the preferred orientation at higher bias. The hardness always reduces for TiN coatings with increase in bias, whereas for Ti1−xAlxN it shows a reverse trend. The results are qualitatively explained by the role played by Al in Ti1−xAlxN. The results indicate that the peak bias plays a more dominant role than time averaged bias.
Journal: Surface and Coatings Technology - Volume 200, Issue 7, 21 December 2005, Pages 2459–2464