Gotowe bibliografie tematyczne / WEAR BEHAVIOUR OF CHROME-NITRIDE

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Gotowa bibliografia na temat „WEAR BEHAVIOUR OF CHROME-NITRIDE”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "WEAR BEHAVIOUR OF CHROME-NITRIDE"

Keshavamurthy, R., J. Madhu Sudhan, Anurag Kumar, Vivek Ranjan, Pratyush Singh i Amandeep Singh. "Wear Behaviour of Hard Chrome and Tungsten Carbide-HVOF Coatings". Materials Today: Proceedings 5, nr 11 (2018): 24587–94. http://dx.doi.org/10.1016/j.matpr.2018.10.256.

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Kaviti, R. Vara Prasad, D. Jeyasimman, Ramesh Kumar S C i Mohan Babu BM. "Investigation of wear behaviour of magnesium reinforced with boron nitride nanocomposite using ANN". Journal of Mines, Metals and Fuels 69, nr 12A (28.04.2022): 190. http://dx.doi.org/10.18311/jmmf/2021/30101.

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The present study aims to study the wear behaviour of Mg reinforced with boron nitride nanocomposite. The dry sliding wear behaviour of Mg reinforced with boron nitride (0.5 wt.%) is reviewed by following ASTM standards G99, i.e., dry sliding on pin-on-disk wear test apparatus. Three wear parameters, namely load, sliding speed, and sliding distance, were considered in this study. The experiments for wear rate have been conducted as per ASTM standards G99. The wear rate obtained for Mg reinforced with boron nitride (0.5 wt.%) is predicted by the ANN toolbox of Matlab R2021a using the Levenberg-Marquardt (trainlm) algorithm, which trains the feed-forward neural network having 3-5-1 (three input neurons, five hidden neurons in the single hidden layer and one output neuron). Experimental data sets obtained from the pin-on-disk wear test have been utilized to develop ANN. The results concluded that the error for wear loss of Mg reinforced with boron nitride (0.5 wt.%) lies within 20%, with an average percentage error of 2.6% between experimental values and ANN predicted values.

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Spies, Heinz-Joachim, Horst Biermann i Anke Fischer. "Nitriding behaviour of the intermetallic alloy FeAl". International Journal of Materials Research 96, nr 7 (1.07.2005): 781–86. http://dx.doi.org/10.1515/ijmr-2005-0136.

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Abstract An iron-based intermetallic FeAl alloy was gas nitrided under well-defined conditions, and the influences of the process parameters, i. e., time, temperature, and nitriding potential on the layer formation, were investigated. Microstructural, morphological, and chemical characterization of the nitride layer was performed by means of glow discharge optical spectroscopy, electron probe microanalysis, scanning electron microscopy, X-ray diffraction, internal-stress measurement, hardness– depth profiles, and indentation fracture mechanics. Pin-on-disk tests were carried out to investigate the load-bearing capacity and wear resistance of the nitride layers. The formation of hexagonal AlN during the nitriding treatment leads to an increase in hardness of about 920 – 980 HV 0.025 and to a significant improvement of the wear resistance. Additional annealing tests proved the thermal stability of the nitride layer up to 950 °C.

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Piconi, Corrado, Vincenzo De Santis i Giulio Maccauro. "Clinical Outcomes of Ceramicized Ball Heads in Total Hip Replacement Bearings: A Literature Review". Journal of Applied Biomaterials & Functional Materials 15, nr 1 (26.01.2017): 1–9. http://dx.doi.org/10.5301/jabfm.5000330.

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Background Metallic ball heads for total hip replacement (THR) bearings with ceramicized surfaces were introduced in orthopedics during the second half of the 1980s, with the aim of decreasing the wear of polyethylene cups. Methods An analysis was made of the literature regarding outcomes for metallic ball heads with ceramicized surfaces now in clinical use (TiN, TiNbN, ZrN, monoclinic ZrO2), as well as carbon coatings (pyrolytic carbon, diamond-like carbon) and silicon nitride as coatings in ball heads for THR bearings. Results Notwithstanding the diffusion of ceramicized ball heads in THRs, there are few reports about their clinical outcomes in hip arthroplasty. In addition, several clinical studies and some registry data are putting under scrutiny the clinical advantages of ceramicized ball heads over cobalt chrome (CoCr) alloy and ceramic ball heads. Conclusions The wear of THR bearings with ceramicized ball heads looks like it depends more on the behavior of the polyethylene cups than on the treatment of the ball head surface. The risk of coating damage and of its consequences has to be taken into account in selecting this type of bearing.

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Liang, Bu Nv, Biao Chen, Zhen Yu Zhang i Peng Lin Zhang. "Wear Behaviour of Thermal Spray Welded FeNi and CeO₂ Composite Coatings". Advanced Materials Research 194-196 (luty 2011): 363–66. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.363.

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FeNi alloy powders with and without 0.4 % CeO2were flame spray welded onto 1045 carbon steel substrate. Vickers microhardness profiles of the coatings were carried out. Sliding wear tests in dry conditions were carried out by means of weight-loss method for several applications in oil industries. For this purpose, Ni-based alloy and high chrome cast iron were used as compared materials. A scanning electron microscope(SEM) was used to analyze the wear phenomena of samples. The result showed that the hardness of the coatings can be improved by addition of 0. 4 % CeO2, and the anti-adhesion, anti-scratching, and plastic deformation resistance abilities of coatings are increased with the addition of CeO2.

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Łuszcz, Maciej, Remigiusz Michalczewski, Marek Kalbarczyk, Edyta Osuch-Słomka, Jarosław Molenda, Le Liu, Maksim Antonov i Irina Hussainova. "EFFECT OF HBN ON WEAR OF AlCrN-COATED SPARK PLASMA - SINTERED TiB2/Ti COMPOSITES AT TEMPERATURES UP TO 900°C". Tribologia 299, nr 1 (31.05.2022): 43–55. http://dx.doi.org/10.5604/01.3001.0015.8756.

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In this work, hexagonal boron nitride powder was used for the lubrication of an interface of TiB2/Ti composite protected by an AlCrN coating and a ceramic Si3N4 ball. The wear behaviour of this tribo-pair in an oscillating motion was studied with an SRV tribotester at the temperature range from room temperature to 900 °C. The action of hexagonal boron nitride as a solid lubricant was analysed with the use of a 3D microscopy and energy-dispersive spectroscopy. The test results confirmed that under high-temperature conditions, the use of hexagonal boron nitride as a solid lubricant does not increase the wear resistance of the TiB2/Ti composite. The use of the AlCrN coating significantly reduces wear at the temperature up to 600 °C only, while the combined use of the AlCrN coating and hBN lubrication provides effective protection against wear even at the temperature up to 900 °C. Therefore, the synergy of the anti-wear action of the coating and the solid lubricant was proved.

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Şen, Uğur, Murat Uzun i Şaduman Şen. "Tribological Properties of Vanadium Nitride Coated AISI 52100 Steel". Advanced Materials Research 445 (styczeń 2012): 643–48. http://dx.doi.org/10.4028/www.scientific.net/amr.445.643.

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In the present study, the wear and friction behaviour of vanadium nitride coated AISI 52100 steel against hardened AISI D2 steel disc was studied using ball-on-disc arrangement. Vanadium nitride coating treatment was performed on pre-nitrided AISI 52100 steel balls using thermo-reactive diffusion techniques. The presence of VN and V2N phases in the coating layer was confirmed by X-ray diffraction analysis. Friction and wear tests were carried out at dry test conditions under 2.5 N, 5 N and 10 N loads at 0.1 m/s, 0.2 m/s and 0.3 m/s sliding speeds. The results showed that the friction coefficient values of vanadium nitride coated AISI 52100 steel balls against hardened AISI D2 steel disc are changing between 0.49 and 0.71, depending on test conditions. The wear rates of the vanadium nitride coated AISI 52100 steel is ranging from 6.704×104 mm3/m to 2.619 × 106 mm3/N m. In general, the wear rate increased with the increase in load and sliding speed.

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Tatarko, Peter, Zdeněk Chlup i Ján Dusza. "Microstructure, Fracture and Damage Mechanisms in Rare-Earth Doped Silicon Nitride Ceramics". Key Engineering Materials 465 (styczeń 2011): 93–96. http://dx.doi.org/10.4028/www.scientific.net/kem.465.93.

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Influence of rare-earth oxide additives on the strength, fracture toughness and tribological behaviour of hot-pressed Si3N4 and Si3N4/SiC micro/nano-composites has been investigated. Four-point bending mode and ball on disc methods have been used for strength and wear tests and Single-Edge V-Notched Beam, Chevron Notched Beam, Indentation Strength and Indentation Fracture techniques for fracture toughness measurement. Fractography has been used to characterize strength limiting defects, fracture micromechanisms and damage mechanisms during the wear test. The strength values were strongly influenced by the present processing flaws. Wear behavior is significantly influenced by the chemical composition and by the microstructure of the materials.

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Bozyazı, E., M. Ürgen i Ali Fuat Çakır. "Comparison of reciprocating wear behaviour of electrolytic hard chrome and arc-PVD CrN coatings". Wear 256, nr 7-8 (kwiecień 2004): 832–39. http://dx.doi.org/10.1016/s0043-1648(03)00523-4.

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Puppa, Jan, i Bernd Arno Behrens. "Optimization of Cooling and Lubrication for Nitrided and Ceramic-Coated Hot Forging Dies". Applied Mechanics and Materials 794 (październik 2015): 97–104. http://dx.doi.org/10.4028/www.scientific.net/amm.794.97.

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In order to enhance the tool life of hot forging dies, increasing the wear resistance of the forming tool surface is of great importance. In addition to thermal and thermo-chemical surface treatments, methods applying thin wear-resistant coatings gain more importance. Therefore, ceramic-based mono- or multilayer hard coatings are used in combination with a supporting nitride layer. Due to their low material-specific thermal conductivity, ceramic coatings have an increased sensitivity to abrupt temperature changes. To avoid such thermal shocks, an adjustment of the cooling behaviour is required. This paper presents the results of laboratory forging tests conducted under different cooling and lubrication conditions on nitrided dies with ceramic coatings. By means of a selective cooling of the forming tool surface and using boron nitride as lubricant the wear behaviour of the forging dies could be improved.

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Rozprawy doktorskie na temat "WEAR BEHAVIOUR OF CHROME-NITRIDE"

Wang, Xihong. "Wear behavior of PVD titanium nitride-coated tool steels /". Full text open access at:, 1989. http://content.ohsu.edu/u?/etd,237.

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Böhm, Jakub. "Měřicí doteky ve strojírenské metrologii". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377656.

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This diploma thesis deals with measuring touches problems in industrial metrology. Thesis describes adhesive wear and tear which is caused by measuring probes when dynamical measuring is being concluded. Measuring of damaged component made of silumin and its different changes of texture by different measuring probes are evaluated. Measuring touches are made of titanium nitride, silicon nitride, zirconium, bearing chrome steel, ruby, experimental composite material and nanocrystalline diamond.

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SINGH, SHAILESH KUMAR. "STUDY OF WEAR BEHAVIOUR OF CHROME-NITRIDE COATING USING PHYSICAL VAPOR DEPOSITION". Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14567.

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ABSTRACT In the present investigation, Wear behaviour of chrome coating was examined using PVD (Ion Plating) in dry and flooded condition. The PVD having 93.7% Cr and 6.3% Nitrogen is used. The cast iron substrate of same composition as of piston rings was used to get the similar result as in the engine cylinder piston combination. After preparation of the coating, the plate (90×90×2 mm) was prepared with the help of a surface grinder and further wear test were performed on a pin-on disc configuration. The load and velocity range varies from (50, 60, 70, 80, 90 & 100 N), and Speed (319, 764, & 1433 rpm) keeping the sliding distance 2500 m. The wear rate was calculated using mass loss methods on an electronic balance having least count of 0.0001g. The morphology of worn surface was analysed with SEM & EDS which allow to elucidating the mechanism of wear and chemical composition of the tribo-film formed during the pin and disc sliding contact. The main wear mechanisms observed by SEM were adhesion, deformation, microcutting and erosion. There was a significant decrease in the specific wear rate of coated sample compared to uncoated and large reduction of coated sample in flooded condition compare to dry condition of test. The wear rate of the coating was found to be increased with increase in load as well as sliding speed for the Ion Plating with the counter body that is material of Cylinder liner which is alloy of cast iron. However, The Coefficient of friction was found to be decreased with the increase of load of 50 to 70 N and sliding speed from 1 m/s to 3 m/s. In these conditions chrome coating shows the better tribological behaviour.

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PANDEY, SHAILESH MANI. "Wear Behaviour of Piston Ring Coatings". Thesis, 2013. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14252.

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The functions of a piston ring are to seal off the combustion pressure, to distribute and control the oil, to transfer heat and to stabilize the piston. Most piston rings and metallic sealing rings for modern application require some form of coating, where running conditions are severe to minimise abrasion and corrosion. The piston ring coating improves the life of engine as well as fuel efficiency. In this study, three type of piston coating processes were investigated: Plasma Arc Spray, Hard Chrome Plating & Gas Nitriding. Plates with similar composition as the piston ring material were prepared by the casting process using induction arc furnace and sand mould. The plasma arc coating having composition with weight percentage 20 %( 63) Mo, 10% (43) NiCr 10% (70) Cr3C2 60 % (350) Fe was used. Thermal spray process of the type plasma arc spray was used for the study along with hard chrome plating and gas nitriding, which are the preferred processes in the automobile industries. The cast iron substrate of same composition as of piston rings was used to get the similar result as in the engine cylinder piston combination. After preparation of the coating, the plate (90x90x2 mm) was prepared with the help of a surface grinder and a fixture was designed to hold the plate on the pin on disc machine. There are different wear tests such as scratch test, slurry abrasion test, erosion test and pin on the disc test. The selection of the wear test depends on the material of the coating and its applications. For marine applications of the coating, slurry erosion and corrosion test are preferred. But in case of dry applications of the coating the pin on disc and scratch test are commonly performed. In the present study two variables were selected for wear test: load (30, 40 and 50 N) and wear track (50, 60 and 70 rpm) keeping the sliding distance 1200 m and speed 500rpm Wear behaviour of piston ring coatings, Delhi Technological University, Delhi, Shailesh Mani Pandey (M.Tech, Production) III constant. Wear test of the coating was conducted on pin on disc machine under dry conditions. The wear rate was calculated using mass loss methods on an electronic balance having least count of 0.0001g. The coefficient of friction was found with LVDT which elucidated the frictional force during wear test. The morphology of worn surfaces of the coating was analysed with scanning electron microscope. The XRD was done to determine the change in intermolecular spacing of the worn surfaces of the coating. The wear rate of the coating was found to be increased with increase in load as well as sliding speed for the plasma spray coating and gas nitriding but reverse trends were observed for the hard chrome plating. However, the co-efficient of friction of the coating was found to decrease with increased load and sliding speed for all processes. The dspacing of the coating molecules on the wear track was found to decrease with increased load. The microstructure of the worn surfaces of the coating was also examined with optical telescope and no change in microstructure of the coating due to frictional heat was found. The micro hardness at the cross section of the coating at wear track was found to decrease when moving away from the wear track. The main wear mechanisms observed by scanning electron microscope were adhesion, deformation and microcutting. The wear rate depends on the load applied. With the increase of applied load the wear rate found to be increased except in the case of hard chrome plate with the tungsten carbide counter body. The Coefficient of friction was found to be decreased with the increase of load except in the hard chrome plating with the tungsten carbide pin.
Dr.Qasim Murtaza (Associate Professor) & Mr.Raghvendra Gautam (Assistant Professor)

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Lin, Yi-Hung, i 林毅弘. "Wear Behavior of Cathodic Arc Plasma Deposited Titanium Nitride". Thesis, 1996. http://ndltd.ncl.edu.tw/handle/00681412826478635949.

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碩士
逢甲大學
材料科學研究所
84
Recent investigation on the current status of hard coatings shows that cathodic arc plasma (CAP) deposition is the most widely used process for tool application while titanium nitride (TiN) is the most common material.Great advantages can be obtained from CAP coating that plenty of reports about wear behavior were appeared. However, these reports emphasized the performance of tool materials with and without CAP coating. A systematical study on the coating parameters that affecting the wear behavior is lake. In this study, wear test were carried out by using Ball-on- Disk sliding wear test which is the closest method to real metal forming. Substrate bias and nitrogen pressure, which are the most important coating parameters for arc-evaporation, and the substrate bias during the initial etching stage ( titanium ion bombardment ) were changed to evaluate the influence on wear performance. Experimental results showed that the amounts and sizes of macroparticles, film thickness, hardness, adhesion and microstructure of TiN film were all affected by coating parameters. The deposited films were observed with a decrease in the amount and size of macroparticles, deposition rate, hardness and adhesion when increasing substrate bias. With increasing substrate bias the TiN(111) preferred orientation was replaced by TiN(220). A decrease in the amount of macroparticles and voids with increasing nitrogen pressure, while the deposition rate and adhesion increased, the preferred orientation changed to TiN(111). During the etching stage, the higher substrate bias suffered a higher ion flux and the subsequent higher substrate temperature, which flattened the macroparticles in the deposited film and the higher adhesion strength. The wear test showed that TiN films whatever deposited exhibited a low wear loss.Some appeared a negative values. The films deposited at low substrate bias with higher density in macroparticles caused a mass transfer of the counter material and the negative value in wear loss was obtained. The higher friction coefficient of the TiN film obtained at high substrate bias was dominantly attributed to the contribution of gouging wear. The wear modes observed were abrasion wear, gouging wear, brinelling and adhesive wear in mass transfer mode.The decreased friction coefficient with increasing nitrogen pressure should then be attributed to a decreased amount of macroparticles on the surface of deposited films and wear loss gradually changed to a negative value,owing to mass transfer. The wear modes observed were composed of abrasion wear of the counter material against the deposited films and substrate, gouging wear, the spalling of deposited films and adhesive wear in mass transfer mode.

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Kun-CyuanLin i 林崑荃. "Wear behavior of high speed steel with different roughness pairing with chrome steel ball / ceramic ball under dry abrasion". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/95268011951495839421.

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碩士
國立成功大學
機械工程學系碩博士班
100
In this study, a series dry abrasion wear test of chrome steel ball and ceramic ball pairing with high speed steel substrate with different roughness are carried out. SRV reciprocating wear test machine and Pin On Disc rotary wear test machine are used. The results indicate that: when chrome steel ball is used as the upper specimen, we need to remove the adhesion layer to get the parabolic area which is a standard to compare the amount of wear. The adhesion is particularly serious in this experiment while use the NO.120 sandpaper grinding. Results from contact type roughness measurement show that the wear scar width of chrome steel ball and specimen are larger and the wear scar depth of specimen is smaller, but the wear scar width of ceramic ball and specimen are smaller and the wear scar depth of specimen is larger.

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CHEN, GUAN-RONG, i 陳冠融. "High Temperature Wear Behaviors and Cutting Performances of AISI M35 End-mills deposited with High Power Impulsed Magnetron Sputtering Titanium Nitride Coatings". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/436b46.

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Książki na temat "WEAR BEHAVIOUR OF CHROME-NITRIDE"

Susiloningrum, T. E. Friction and wear behaviour of titanium nitride coatings on AISI 310 stainless steel and AISI 01 steel. Manchester: UMIST, 1995.

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Części książek na temat "WEAR BEHAVIOUR OF CHROME-NITRIDE"

Kukshal, Vikas, Ankush Sharma, Vinayaka R. Kiragi, Amar Patnaik i Tapan Kumar Patnaik. "Erosive Wear Behaviour of Carbon Fiber/Silicon Nitride Polymer Composite for Automotive Application". W Energy, Environment, and Sustainability, 117–29. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0434-1_7.

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Khader, I., S. Fünfschilling, A. Kailer i R. Oberacker. "The Behavior of Silicon Nitride Tools in Hot Rolling Copper Wire". W Friction, Wear and Wear Protection, 383–92. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527628513.ch48.

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Xu, Bin, Shu Hua Wang, Yu Peng Lu, Jianjun Cui i Mu Sen Li. "Effect of Micro-Addition Rare Earth and Chrome on Friction and Wear Behavior of Boronized Layer". W Key Engineering Materials, 1401–5. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-978-4.1401.

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Caliskan, Halil, Bilal Kursuncu, Sevki Yilmaz Guven, Abdullah Cahit Karaoglanli, Mustafa Sabri Gok i Akgun Alsaran. "Effect of Boron Nitride Coating on Wear Behavior of Carbide Cutting Tools in Milling of Inconel 718". W Machining, Joining and Modifications of Advanced Materials, 13–21. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1082-8_2.

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"Tribological Properties of Ceramics, Cermets, and Cemented Carbides". W Tribomaterials, 271–300. ASM International, 2021. http://dx.doi.org/10.31399/asm.tb.tpsfwea.t59300271.

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Abstract This chapter concerns itself with the tribology of ceramics, cermets, and cemented carbides. It begins by describing the composition and friction and wear behaviors of aluminum oxide, silicon carbide, silicon nitride, and zirconia. It then compares and contrasts the microstructure, properties, and relative merits of cermets with those of cemented carbides.

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Kleer, G., R. Kassner, E. M. Meyer, M. G. Schinker i W. Doell. "Effect of process parameters on the residual stresses and the wear behavior of aluminum nitride physical vapor deposition coatings". W Metallurgical Coatings and Thin Films 1992, 167–72. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89900-2.50033-6.

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Streszczenia konferencji na temat "WEAR BEHAVIOUR OF CHROME-NITRIDE"

Chinnakurli Suryanarayana, Ramesh, Saleem Khan, Praveennath G. Koppad i Zulfiqar Khan. "Tribological Behaviour of Hot Extruded Al6061-Si3N4 Composite". W ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64459.

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Silicon nitride (Si3N4) possesses excellent hot hardness, wear resistance coupled with good corrosion resistance. Further, it possesses high anti friction properties making it an ideal reinforcement in developing high quality light weight, metal matrix composites for tribological applications. Silicon nitride has been successfully dispersed in aluminum alloy matrices. Their tribological properties with the beneficial effect of silicon nitride in enhancing the wear resistance of metal matrix composite have been reported by several researchers. Most of the researchers have focused on development of silicon nitride reinforced aluminum composite by powder metallurgy and casting route. However, meager information is available as regards the secondary processing of these composites in particular hot extrusion. Several researchers have reported an improved tribological behaviour in composites after extrusion. Hot extrusion of light weight metal matrix composites is very challenging. In the light of the above, this paper discusses the tribological behaviour of hot extruded Al6061 aluminum composites, which were initially developed by stir casting technique. Nickel coated silicon nitride particles were dispersed in Al6061 alloy using stir casting process. The cast composites were extruded at an extrusion ratio of 1:10 adopting a temperature of 550°C. The hot extruded composite (6Wt% Si3N4) and the matrix alloy were subjected to metallographic studies, microhardness and friction and wear tests using a pin on disc machine. Friction and wear test were carried out at loads ranging from 10 to 60 N at a sliding velocity of 0.314m/s. The worn surfaces and wear debris analysis have been carried out to understand the mechanism of wear in the developed hot extruded composites. The developed hot extruded composites exhibited lower coefficient of friction and wear rates when compared with matrix alloy.

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Guilemany, J. M., i D. Fernández. "Corrosion and Tribological Behaviour of Polyamide-Nitride Composite Coatings". W ITSC2005, redaktor E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2005. http://dx.doi.org/10.31399/asm.cp.itsc2005p0851.

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Abstract Over the last years, interest in thermally sprayed polymer coatings has increased. They have excellent corrosion and chemical resistance properties. Unfortunately, they have some limited properties like scratch and wear resistance. Fillers can be a good solution to improve these properties. In the Thermal Spray Centre of Barcelona, blends of polyamide powder with different contents of boron and silicon nitride have been flame-sprayed and studied. Microstructural characterisation of the composite coatings has been done using Optic and Scanning Electron Microscopies. Wear resistance has been evaluated by means of Ball on Disk (ASTM G99-90) and Rubber Wheel (ASTM G65-91) tests. Salt Spray Fog tests (ASTM B117-90) have been performed in order to evaluate their corrosion resistance.

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Cai, F., Xiao Huang, Q. Yang i Doug Nagy. "Tribological Behaviours of Titanium Nitride and Chromium Nitride Based PVD Coating Systems". W ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68107.

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This study investigates the effects of the deposition process and coating composition on microstructural and tribological properties of TiN and CrN based coating systems. Coatings were produced using various PVD based processes — electron beam (EB), cathodic arc (CA) and plasma enhanced magnetron sputtering (PEMS). All coated samples were evaluated for their composition, microstructure and surface morphology. Coating mechanical properties such as hardness, Young’s modulus and coefficient of friction were also studied and related to their microstructures, wear and erosion resistances. It was found that hardness (H), Young’s modulus (E) and coefficient of friction had impact on both wear and erosion rates. In particular, the H3/E2 ratio was inversely proportional to the specific wear rate. For erosion behaviour, higher H3/E2 ratios relate to lower erosion rates at low impingement angles; whereas higher H3/E2 ratios relate to higher erosion rates at high impingement angles.

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Grewal, Jasmaninder Singh, Buta Singh Sidhu i Satya Prakash. "Wear Behaviour of Conventional and Nanostructured Thin Films of Titanium Aluminium Nitride". W ITSC2015, redaktorzy A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen i C. A. Widener. ASM International, 2015. http://dx.doi.org/10.31399/asm.cp.itsc2015p1199.

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Abstract Titanium aluminium based nitride (Ti, Al)N coatings possess excellent tribological behaviour with respect to metal cutting and polymer forming contacts. In the present work TiAlN coatings were deposited by plasma spray process. Three coatings of TiAlN were deposited on AISI-347 grade boiler steel substrate out of which two were thin nano coatings deposited at different temperatures of 500°C and 200°C and one conventional coating was deposited by plasma spraying. The as sprayed coatings were characterized with relative to coating thickness, microhardness, porosity and microstructure. The optical microscopy (OM), the XRD analysis and field mission scanning electron microscope (FESEM with EDAX attachment) techniques have been used to identify various phases formed after coating deposited on the surface of the substrate. Subsequently the sliding wear behaviour of uncoated, PVD sprayed nanostructured thin TiAlN coatings deposited at 500°C and 200°C and plasma sprayed conventional coated AISI-347 grade boiler steel were investigated according to ASTM standard G99-03 using pin on disk wear test rig. Cumulative wear volume loss and coefficient of friction, μ were calculated for the coated as well as uncoated specimens for 10, 15 and 20 N normal loads at a constant sliding velocity of 1 m/sec. The worn out samples were analysed with SEM/EDAX. Wear rates in terms of volumetric loss (mm³/g) for uncoated and coated alloys were compared. The nanostructured TiAlN coatings deposited at 500°C and 200°C has shown minimum wear rate as compared to conventional TiAlN coating and uncoated AISI-347 grade boiler steel. Nanostructured TiAlN coatings were found to be successful in retaining surface contact with the substrate after the wear tests.

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Mahesh, L., J. Sudheer Reddy, L. R. Jagadeesh i M. Vinyas. "The study of microstructure and wear behaviour of titanium nitride reinforced aluminium composites". W PROCEEDINGS OF THE 35TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY (PPS-35). AIP Publishing, 2020. http://dx.doi.org/10.1063/1.5141587.

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Lugbauer, M., E. Badisch i A. Kröll. "Wear Behaviour and Performance of a Cost-Effective Iron-Based, Carbide-Reinforced, Sintered Coating". W ITSC2010, redaktorzy B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima i G. Montavon. DVS Media GmbH, 2010. http://dx.doi.org/10.31399/asm.cp.itsc2010p0010.

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Abstract In every industry wear plates and parts are demanded in heavy duty standards at cost effectiveness and environmental friendliness. For that reasons a new kind of coating technology was developed, and first applied on parts for agricultural machinery for getting results from the field. Simultaneously lab tests were done to compare the wear behaviour and performance of these sintered iron-based coatings with mainly chromium-carbides and borides in it, with other well known wear-resistant coatings like hard chrome, thermal sprayed coatings (Ni-matrix/WC), PTA welded coatings (Ni-matrix/WC, high speed steel) and processed steel like Hardox. Wear tests were performed under 3-body-abrasion as well as combined impact/abrasion conditions, respectively. Dry-sand rubber-wheel procedure according ASTM G65 was used to investigate low stress abrasion, whereas for high stress abrasion investigations a steel wheel was used. A special designed impeller-tumbler apparatus was used for combined impact and abrasion wear tests. Analysis after testing was done quantitatively by gravimetric mass loss, and qualitatively using SEM microscopy (edge stability, wear mechanisms). The ambition of this investigation is to secure the wear performance of the sintered iron-based coating at low production costs compared to well known anti-wear solutions applied in wear intensive industries.

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Oechsner, M., T. Engler, H. Scheerer, Y. Joung, K. Bobzin, W. Wietheger, M. Knoch i M. Schulz. "Tribological and Corrosion Behavior of HVOF Sprayed Cr3C2-NiCr with Nickel Cladded Graphite and Hexagonal Boron Nitride". W ITSC2021, redaktorzy F. Azarmi, X. Chen, J. Cizek, C. Cojocaru, B. Jodoin, H. Koivuluoto, Y. C. Lau i in. ASM International, 2021. http://dx.doi.org/10.31399/asm.cp.itsc2021p0732.

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Abstract High-velocity oxyfuel (HVOF) sprayed coatings of Cr3C2-NiCr containing solid lubricants such as nickel cladded graphite and hexagonal boron nitride were successfully developed and characterised with the aim of optimizing their friction and wear behaviour. HVOF technology was used for the integration of solid lubricants to achieve strong cohesion between particles while minimizing thermal decomposition. Coating microstructure and composition were measured and correlated to the results of tribological and corrosion tests. The integration of the solid lubricant greatly reduced friction and wear volume at room temperature, but the lubricating effect was highly dependent on atmosphere and temperature. Cr3C2-NiCr with hBN, however, tends to exhibit more stable wear resistance over a wider temperature range and can be used at temperatures beyond 450 °C.

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Bobzin, K., F. Ernst, K. Richardt, T. Warda i G. Reisel. "HVOF-Sprayed TiC-Strengthened Fe-Coatings as Alternative to Conventional Carbide Materials". W ITSC2008, redaktorzy B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima i G. Montavon. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2008. http://dx.doi.org/10.31399/asm.cp.itsc2008p0568.

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Abstract HVOF-sprayed carbide based coatings such as WC/Co or Cr3C2/NiCr are industrially well established for wear and corrosion protection applications. Due to their high carbide content of typically 75 wt.-% and more, they are providing a very high hardness and excellent wear resistance. Unfortunately costs for matrix materials like Ni or Co underlie strong fluctuations and are significant higher compared to iron. Therefore an alternative concept to the conventional carbides is based on TiC-strengthened low cost Fe-base materials, which are already in use for sintering processes. Depending on the carbon content the Fe-base material can additionally offer a temperable matrix for enhanced wear behaviour. Within this study the sprayability of TiC-strengthened Fe-powders with a gaseous and a liquid fuel driven HVOF-system has been investigated. The resulting coatings have been analysed with respect to microstructure, hardness and phase composition and compared to galvanic hard chrome, HVOF-sprayed and remelted NiCrBSi and HVOF-sprayed Cr3C2/NiCr (80/20) coatings as well as sintered Fe/TiC reference materials. Furthermore the Fe/TiC coatings have been heat treated to proof the retained temperability of the Fe-matrix after thermal spray processing. For determination of wear properties tribometer tests have been conducted. Currently the corrosion resistance of the sprayed Fe/TiC coatings is investigated as well the wear behaviour in a practical hydraulic test bench.

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Bolelli, G., V. Cannillo, L. Lusvarghi, E. Soragni, A. Loreto i T. Valente. "A Comprehensive Characterization of Industrially Manufactured Hard Chrome Platings and of Thermally Sprayed Alternatives". W ITSC2005, redaktor E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2005. http://dx.doi.org/10.31399/asm.cp.itsc2005p1456.

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Abstract HVOF-sprayed coatings (WC-17Co, WC-10Co-4Cr, Co-28Mo-17Cr-3Si) have been compared with various kinds of industrially manufactured hard chrome coatings (HCC), whose substrate preparation, deposition process, post deposition treatments greatly affect their characteristics. Microstructure, micromechanical properties, tribological behaviour and corrosion resistance (electrochemical polarization tests and Corrodkote test) have been studied. HVOF-sprayed cermets are harder but less tough than HCC, Co-28Mo-17Cr-3Si are less hard than HCC. Splats detachment causes a comparable or higher mass loss in three-body abrasion than HCC coatings. Forming a uniform surface film, cermet coatings definitely overcome HCC in two-body sliding, while Co-28Mo-17Cr-3Si has insufficient hardness to display good sliding wear resistance. HVOF coatings show no passivation in corrosive media but cermets posses more noble corrosion potentials than HCC, and undergo generalized corrosion in HNO3 and HCl, with similar corrosion current densities (IC). HCC passivate and resist well in HNO3 0.1N, but undergo pitting corrosion in 0.1N HCl. Definitely different EC and IC are recorded for various HCC in HCl. HVOF-sprayed cermet coatings show lower IC in 0.1N HCl solution than several kinds of HCC. No visible damage occurs on HVOF-sprayed coatings after the Corrodkote test, while non de-hydrogenated HCC suffered pitting corrosion.

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Joel, J., i M. Anthony Xavior. "Enhancing the Frictional Behaviour of H-BN Reinforced Nanocomposites Through Laser Shock Peening". W ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10162.

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Abstract In this research work, LM6 Aluminum alloy based metal matrix composites reinforced with varying amounts (0.2, 0.4, 0.6 and 0.8 wt%) of boron nitride (BN) having 10 to 30 nanometers average size were developed by using powder metallurgy and squeeze casting routes. The mechanical and tribological properties are analyzed for the samples developed through the two different routes and the influence of the process on the properties is discussed. Thus developed nano composite is studied for the effect of weight percentage addition of nano H-BN particle on the bulk and surface properties. Mechanical testing and advanced characterization methods are used to study the effect of the nano H-BN addition to the matrix material and to evaluate the composite for its suitability as a potential friction material used in strategic sectors. It has been inferred that the presence of nano H-BN have improved the bulk and surface properties. Further, it has been established that the powder metallurgy route has some favorable results when compared to squeeze casting in terms of certain properties. Thus fabricated composites were subjected to laser shock peening process to study its impact on the surface and wear characteristics. The 0.6 wt% H-BN reinforced composites fabricated separately by Powder metallurgy and Squeeze casting method are exposed to laser shock peening process and it was inferred that there is a significant improvement on the surface and wear properties when compared to normal specimen.

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Raporty organizacyjne na temat "WEAR BEHAVIOUR OF CHROME-NITRIDE"

Yust, C. S. Friction and wear behavior of in-situ reinforced silicon nitride. Final report. Office of Scientific and Technical Information (OSTI), październik 1995. http://dx.doi.org/10.2172/110747.

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