Surface Engineering

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Formation of nitrided layers on duplex steel – influence of multiphase substrate
Surface Engineering - Tập 26 Số 4 - Trang 299-304 - 2010
J. Bielawski, J. Baranowska
The present paper reports the results of gas nitriding of duplex stainless steel and study of the effect of substrate structure on the nitrided layers. The differences in the growth of the layers on austenitic and ferritic substrate were studied. The microstructure and phase composition of the layers were investigated using light microscopy analysis), X-ray diffraction (XRD and grazing an...... hiện toàn bộ
Low temperature gaseous nitriding and carburising of stainless steel
Surface Engineering - Tập 21 Số 5-6 - Trang 445-455 - 2005
Thomas L. Christiansen, Marcel A.J. Somers
The response of various austenitic and duplex stainless steel grades to low temperature gaseous nitriding and carburising was investigated. Gaseous nitriding was performed in ammonia/hydrogen mixtures at temperatures <723 K; gaseous carburising was carried out in carbon monoxide/hydrogen mixtures for temperatures ≤783 K. The case developed by thermochemical treatment was examined using...... hiện toàn bộ
Microstructural studies of e-beam evaporated alumina thin films
Surface Engineering - Tập 30 Số 8 - Trang 594-599 - 2014
I. Neelakanta Reddy, ‬V. Raghavendra Reddy, Arjun Dey, N. Sridhara, S. Basavaraja, Parthasarathi Bera, C. K. Aanandan, Anand Sharma
Alumina thin films of different thicknesses, e.g. 90, 120 and 150 nm, were grown on SS304 thin foil by electron beam evaporation technique. The films were post-heat treated at 500, 700 and 800°C in air and subsequently characterised by X-ray diffraction, atomic force microscopy, field emission scanning electron microscopy and X-ray photoelectron spectroscopy. The effects of thicknesses an...... hiện toàn bộ
Sputter deposition of nanostructured antibacterial silver on polypropylene non-wovens
Surface Engineering - Tập 24 Số 1 - Trang 70-74 - 2008
H. B. Wang, Qufu Wei, J. Y. Wang, Jianquan Hong, Xiuying Zhao
Nanostructured silver films were deposited at room temperature on polypropylene non-wovens by radio frequency magnetron sputter coating to obtain the antibacterial properties, and the relationship between sputter parameters and antibacterial properties were investigated in this paper. The antibacterial activity of the materials was assessed using shake flask test. The effects of silver fi...... hiện toàn bộ
Characterisation of microdischarge evolution and coating morphology transition in plasma electrolytic oxidation of magnesium alloy
Surface Engineering - Tập 23 Số 5 - Trang 324-328 - 2007
Lishi Wang, Chunxu Pan
The present paper studied the appearance evolution of microdischarges, the phase composition and the morphology transition of the coating formed by plasma electrolytic oxidation on AZ91D magnesium alloy. The appearance of microdischarges population experienced apparent changes in size, spatial density and colour, which related with the changes of the type and quantity of the disintegrated...... hiện toàn bộ
Rake and Flank Wear Mechanisms of Coated Cemented Carbides
Surface Engineering - Tập 1 Số 1 - Trang 43-58 - 1985
P. A. Dearnley
A series of commercially available cemented carbides coated with single or composite layers of TiC, TiN, and Al2O3 were used to cut three types of steel, En 8 (080M40), En9 (070M55), and En24 (817M40). For comparison, two uncoated cemented carbides and some Al2O3-ceramic inserts were also tested. The worn ...... hiện toàn bộ
Effect of deposition parameters on TiAlN coating using pulsed DC CFUBMS
Surface Engineering - Tập 29 Số 4 - Trang 287-295 - 2013
Paranjayee Mandal, Ben D. Beake, S. Paul
This paper aims to investigate the parametric effect of deposition and target frequency on the mechanical properties and machining performance of the TiAlN coatings deposited in a dual cathode pulsed dc CFUBMS system. Coating composition is not directly dependent on deposition temperature or target frequency individually but increase in both the parameters has led to Al rich coating. The ...... hiện toàn bộ
FEM Simulation of Two Sided Laser Shock Peening of Thin Sections of Ti-6Al-4V Alloy
Surface Engineering - Tập 19 Số 2 - Trang 127-133 - 2003
Kan Ding
Laser shock peening (LSP) is a fatigue enhancement surface treatment for metallic materials. The key beneficial characteristic of LSP is the presence of compressive residual stresses mechanically produced by shock waves within the metallic materials, which can significantly improve their fatigue life and fatigue strength. During LSP, a laser beam can be directed to impact on either one si...... hiện toàn bộ
Hardness of submicrometre abrasive particles and polish rate measurements
Surface Engineering - Tập 15 Số 4 - Trang 324-328 - 1999
S. Ramarajan, M. Hariharaputhiran, S. V. Babu
Metal surfaces (copper and tantalum) and films (copper and tungsten) and silicon dioxide films were polished in deionised (DI) water using submicrometre sized alumina particles of varying density in benchtop Struers and Strasbaugh polishers. The polish rates for copper and tantalum in DI water increase significantly when the abrasive particle density exceeds a threshold value that correla...... hiện toàn bộ
Performance evaluation of HVOF sprayed WC-10Co4Cr coatings under slurry erosion
Surface Engineering - Tập 35 Số 9 - Trang 816-825 - 2019
Xiaobin Liu, Jiajie Kang, Wen Yue, Zhiqiang Fu, Lina Zhu, Dingshun She, Jian Liang, Peng Wang
Slurry erosion is one of the main failure modes of the hydraulic turbine parts, mud pumps and drill pipes. The high velocity oxygen fuel (HVOF) spray process has been widely used for depositing protective coatings especially the cermet coatings that can significantly improve the slurry erosion resistance of substrate materials. In this work, conventional WC-10Co4Cr composite coatings and ...... hiện toàn bộ
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