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Formation of iron boride layers on steel by d.c.-plasma boriding and deposition processes
Surface and Coatings Technology, 1999Abstract Boriding and deposition of iron borides on Armco iron and the steels Ck45 and 42CrMo4 have been investigated at temperatures below 833 K using BCl 3 –H 2 –Ar gas mixtures activated by pulsed d.c. glow discharges. For the layer deposition FeCl 3 and Fe(CO) 5 were used as precursors.
K Bartsch, A Leonhardt
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Anisotropy of Boride Layers: Effect on the Mechanical Properties of AISI 4140 Borided Steels
Defect and Diffusion Forum, 2010The growth of iron borides over the surface of different steels is of high anisotropy. It was determined that the anisotropy of borided phases reveals a significant instability of properties in service. One of the techniques to determine the effect of anisotropy on the mechanical properties of boride layers is the induced-fracture by Vickers ...
Ivan Campos-Silva +5 more
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Formation of boride layers on steel substrates
Crystal Research and Technology, 2006AbstractBoronizing coatings were prepared by means of pack cementation technique. It was found that using the appropriate substrate and controlling parameters of the boribing process such as boron activity of the mixture, temperature and time of treatment, it is possible to obtain a structure predominantly consisting of the Fe2B phase.
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Characterization of Layers Produced by Boriding and Boriding-PVD on AISI D2 Tool Steel
Materials Performance and Characterization, 2016Boride layers with high hardness and wear resistance were produced on AISI D2 tool steel by thermo-reactive treatment using borax with the addition of 10 wt. % aluminum. Subsequently, PVD treatments were performed on the borided layer. The samples were characterized using optical microscopy, scanning electron microscopy, X-ray diffraction, micro ...
R. G. Pereira +4 more
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Wear behaviour of boride layers on alloyed steels
Tribology International, 1981Abstract The properties of boride layers on steels alloyed with chromium, molybdenum or vanadium are presented first. The properties considered are: chemical composition, phase composition, microstructure, thickness, hardness and roughness. The wear test results shown were obtained with different test rigs, so that the main wear mechanisms could be ...
K.-H. Habig, R. Chatterjee-Fischer
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Surface Engineering and Applied Electrochemistry, 2020
Commercially pure titanium Cp-Ti and Ti6Al4V alloy were liquid borided using a borate bath consisting of 70% borax and 30% SiC at 1000°C for 3, 6, and 12 h. The borided materials were characterized by scanning electron microscopy to reveal the produced microstructures.
M. Keddam +5 more
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Commercially pure titanium Cp-Ti and Ti6Al4V alloy were liquid borided using a borate bath consisting of 70% borax and 30% SiC at 1000°C for 3, 6, and 12 h. The borided materials were characterized by scanning electron microscopy to reveal the produced microstructures.
M. Keddam +5 more
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Structural characterization of vanadized boride layers on steel
Surface and Coatings Technology, 1991Abstract Structural characterization with respect to the depth profile of vanadized boride layers was investigated on SAE8720 steel by repeatedly abrading. Comparative analyses were performed by X-ray diffractometry and scanning electron microscopy. Notable correlation was observed, the results showing strongly alloying effect on structure. A twofold
Zongfu Ma, Furong Tang, Daixun Chen
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Numerical evaluation of scratch tests on boride layers
Surface and Coatings Technology, 2015Abstract An experimental and numerical study of the scratch test on FeB/Fe 2 B bilayers is presented. The boride layers were formed at the surface of AISI 304 steels by developing the powder-pack boriding process at temperatures of 1223 K for 2, 6 and 10 h of exposure times.
A. Meneses-Amador +5 more
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Surface layer structure for boride coatings on tantalum
Materials Science, 1993The boron concentration in a boride coating peaks at 0.5–0.6 µm from the surface. There is a surface layer 9–12 nm thick, which consists of oxycarbides and contains no boron, although this layer does not prevent it from diffusing from the medium into the metal. The surface layers thinner than 0.5 µm are depleted in boron.
O. D. Smiyan, Yu. V. Dzyadikevich
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Mechanical properties of vanadized boride layer on steel
Surface and Coatings Technology, 1992Abstract Fractography and load-bearing studies of a vanadized boride layer were performed on SAE8720 steel by a three-point bending test set combined with an acoustic emission technique, and analysed by scanning electron microscopy. The effects of the modified surface on the mechanical properties of materials, which include load-bearing capacity and ...
Zongfu Ma, Furong Tang, Daixun Chen
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