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Effect of carbon addition on the densification behavior

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The effect of modification of matrix on densification

Dec 23,2010 Effect of carbon addition on the densification behavior#0183;Four different grades of coal tar pitch and a natural pitch were characterized in terms of carbon yield,density,viscosity,and fractionation with solvents,as well as by thermal analysis methods.The suitability of these commercially available matrices for densification of 3 dimensional carbon-carbon composites was examined.Previous123456NextDensification Behavior and Thermal Properties of Hafnium Apr 27,2012 Effect of carbon addition on the densification behavior#0183;Densification behavior and thermal properties of hotpressed HfB 2 B x C particulate composites were studied.Boron carbide powders were synthesized throughout the homogeneity range (B 4.3 CB 10 C) and beyond the carbonsaturated (B 3 C) and boronsaturated (B 12 C) limits for use as sintering additives in HfB 2.Changes in the densification behavior of HfB 2 were observed with Open Access JournalsIn this study,an investigation on the densification behavior and forming limit of powder metallurgy composites containing hard carbide particles were carried out.The selected composite materials are Al4TiC,Al4WC,Al4Fe 3 C and Al4Mo 2 C.The compacts of 0.82 and 0.86 relative density and 0.4 and 0.6 aspect ratio were prepared on a 1-MN capacity hydraulic press using suitable die-set assembly.

Influence of Selective Laser Melting Process Parameters on

This study investigated the effect of laser power (P),scan speed (v) and hatch space (h) on densification behavior,surface quality and hardness of 18Ni300 maraging steel fabricated by selective laser melting (SLM).The results indicated that the relative density of the SLMed samples has a shape increase from 73% to 97% with the laser energy density increasing from 0.5 to 2.2 J/mm2.Effects of carrier gas on densification of porous carbon Jun 15,2003 Effect of carbon addition on the densification behavior#0183;The densification rate of C/C composites fabricated by directional flow thermal gradient chemical vapor infiltration process from C3H6,C3H6-N2 and C3H6-H2 was investigated respectively.The mechanism on the role of carrier gas in chemical vapor infiltration was also discussed.The results shows that whether or not adding N2 as carrier gas has little influences on the densification behaviorEffects of ZnO addition on the sintering behavior and Mar 23,2019 Effect of carbon addition on the densification behavior#0183;In recent years,a considerable number of studies have focused on enhancing the densification of reaction sintered MgAl 2 O 4 at lower temperatures by the use of various additives.10-17 For example,the addition of TiO 2,B 2 O 3,LiF,ZnF 2,BaF 2,and CaF 2 would reduce the sintering temperature of MgAl 2 O 4,while Fe 2 O 3 and CaO facilitate liquidphase sintering.

Effect of the addition of different sintering aids on the

Effect of the addition of different sintering aids on the densification behavior of zirconia-toughened alumina nanocomposite powder.International Journal ofEffect of the addition of different sintering aids on the Effect of the addition of different sintering aids on the densification behavior of zirconia-toughened alumina nanocomposite powder.International Journal ofEffect of short carbon fiber addition on pressureless Jul 01,2015 Effect of carbon addition on the densification behavior#0183;In order to investigate the effect of carbon fiber on pressureless densification of ZrB 2 SiC nanocomposite,the relative density and porosity of samples were measured.Bulk densities and open porosity of the samples after sintering process,were determined by the Archimedes displacement method (ASTM C373-88) with water as the immersing

Effect of carbon addition on the densification behavior

Effect of carbon addition on the densification behavior#0183;A silicon carbide (SiC) coating was prepared on carbon/carbon (C/C) composites by pack cementation using Si,C and Al 2 O 3 powers as raw materials.The role of Al 2 O 3 on the densification of the SiC coating was investigated.The results show that the densification and thickness of the SiC coating obviously increase with the increase of Al 2 O 3 content,which is attributed to theEffect of boron carbide composition on its densification Effect of carbon addition on the densification behavior#0183;The effect of boron carbide composition on its sintering behavior was investigated.Boron carbide of various compositions was synthesized by reacting stoichiometric boron carbide with TiO 2.Titanium oxide was reduced by carbon that originated in stoichiometric boron carbide,leads to a decrease its carbon content and the formation of TiB 2 phase..Powder mixtures containing boronEffect of addition of V2O5 on the densification (2017).Effect of addition of V2O5 on the densification,dielectric and ferroelectric behavior of lead free potassium sodium niobate ceramics.Ferroelectrics Vol.518,The 10th Asian Meeting on Ferroelectrics (AMF-10),Part III,pp.94-102.

Effect of Y2O3 Additions on the Densification of an Al2O3

Effect of Y 2 O 3 Additions on the Densification of an Al 2 O 3 TiC Composite.Authors.Ki-Woong Chae,Department of Inorganic Materials Engineering,College of Engineering,Seoul National University,Seoul 151742,Korea; Search for more papers by this author Effect of Y2O3 Additions on the Densification of an Al2O3 Effect of Y 2 O 3 Additions on the Densification of an Al 2 O 3 TiC Composite.Authors.Ki-Woong Chae,Department of Inorganic Materials Engineering,College of Engineering,Seoul National University,Seoul 151742,Korea; Search for more papers by this author Effect of TiO 2 addition on the densification behavior Effect of TiO 2 addition on the densification behavior,microstructure and mechanical properties of Al 2 O 3 -Cr cermets prepared via vacuum sintering Zhao,Yijie Zheng,Yong

Effect of TiO 2 addition on the densification behavior

Effect of TiO 2 addition on the densification behavior,microstructure and mechanical properties of Al 2 O 3 -Cr cermets prepared via vacuum sintering Zhao,Yijie Zheng,YongEffect of Oxygen Contamination on Densification of TiB2 In order to identify the mechanisms behind the adverse effect of oxygen contamination on the densification of TiB 2 ceramics,densification and grain growth behavior during pressureless sintering (1700 Effect of carbon addition on the densification behavior#176; to 2050 Effect of carbon addition on the densification behavior#176;C) were examined as a function of oxygen content of the powder and compared with those observed during hotpressing (1400 Effect of carbon addition on the densification behavior#176; to 1700 Effect of carbon addition on the densification behavior#176;C).).Marked difference in the grain size Effect of Nanopowder Addition on the Sintering of Water Jul 01,2020 Effect of carbon addition on the densification behavior#0183;A promising method of improving the densification of powder metallurgical steel components is to blend nanopowder with the otherwise typically used micrometre-sized powder.The higher surface-to-volume ratio of nanopowder is hypothesized to accelerate the sintering process and increase the inter-particle contact area between the powder particles.This is supposed to enhance

Effect of Nano-TiO 2 Additions on the Densification and

Nov 30,2016 Effect of carbon addition on the densification behavior#0183;Nano-titania,up to 8 wt%,was added to magnesitedolomite refractory matrix.The phase and microstructure analyses of samples heated up to 1650 Effect of carbon addition on the densification behavior#176;C for 3 h were studied by XRD and SEM/EDS,respectively.The physical properties are reported in terms of bulk density,apparent porosity,and hydration resistance.In addition,the mechanical behavior was studied by a cold crushingEffect of Nano-Al2O3 Addition on the Densification of YSZ This work investigates the effect of nanosized Al2O3 addition on the sinterability of YSZ electrolyte.(1x)YSZ + Al2O3 ceramics with compositions x = 0 to 0.01 were prepared by the conventional mixed oxide route from a commercial powder suspension (particle size Effect of carbon addition on the densification behaviorlt;50 nm),and sintered at 1200 to 1500 Effect of carbon addition on the densification behavior#176;C for 2 hours in air.Densification,phase evolution,and microstructure were characterized Effect of Carbon and Oxygen on the Densification and The role of carbon additions and oxygen content on the densification of zirconium diboride (ZrB 2) was studied.ZrB 2 with up to 1 wt% added carbon was hot pressed at temperatures of 2000 Effect of carbon addition on the densification behavior#176;C and 2100 Effect of carbon addition on the densification behavior#176;C.Nominally pure ZrB 2 hot pressed at 2100 Effect of carbon addition on the densification behavior#176;C achieved relative densities Effect of carbon addition on the densification behaviorgt;95.5%.Carbon and oxygen analysis indicate that oxygen removal was facilitated by the reduction of oxides with carbon or

Effect of Carbon Nanotube Addition on the Tribological

The effect of different fillers on the tribological behavior of an epoxy has been studied using treated and untreated carbon nanotubes,graphite,and a mixture of graphite and carbon nanotubes.Effect of Carbon Dioxide Addition on the Phase Behavior of May 03,2013 Effect of carbon addition on the densification behavior#0183;Volatile organic compounds can be replaced by more benign alternatives,such as ionic liquids (ILs) and supercritical carbon dioxide (scCO2).Previously,we showed that ILs offer advantages as solvents for epoxidation reactions (Kazemi et al.Green Process Synth.,2012,1,509516).In this study,the high-pressure phase behavior of ternary systems containing the epoxidation reaction Effect of CaCN 2 Addition on the Densification Behavior Calcium cyanamide (CaCN 2 ) has been used as a sintering aid as well as a dopant for AlN.The effect of CaCN 2 addition on the densification behavior and electric properties of liquid-phase sintered AlN ceramics was investigated by X-ray diffraction (XRD),transmission electron microscopy (TEM) and scanning electron microscopy (SEM),dielectric and electric resistance measurements.

Effect of CaCN 2 Addition on the Densification Behavior

Calcium cyanamide (CaCN 2 ) has been used as a sintering aid as well as a dopant for AlN.The effect of CaCN 2 addition on the densification behavior and electric properties of liquid-phase sintered AlN ceramics was investigated by X-ray diffraction (XRD),transmission electron microscopy (TEM) and scanning electron microscopy (SEM),dielectric and electric resistance measurements.Densification effects of the carbon nanotube pillar array Densification effects of the carbon nanotube pillar The densication behavior is attributed to the lateral forces densication.In addition,the densication not only improves the density of each CNT pillar but also changes the height of CNT pillars.Table I shows the pillar heights before and afterDensification and Microstructure Development in BoronDensification rates of the B4C-based ceramic composites were found to be affected by addition of (W,Ti)C.Increasing (W,Ti)C content led to an increase of the densification rates of the composites.

Densification Behavior and Thermal Properties of Hafnium

Apr 27,2012 Effect of carbon addition on the densification behavior#0183;Densification behavior and thermal properties of hotpressed HfB 2 B x C particulate composites were studied.Boron carbide powders were synthesized throughout the homogeneity range (B 4.3 CB 10 C) and beyond the carbonsaturated (B 3 C) and boronsaturated (B 12 C) limits for use as sintering additives in HfB 2.Changes in the densification behavior of HfB 2 were observed with Densification Behavior and Performances of C/CNov 19,2013 Effect of carbon addition on the densification behavior#0183;Meanwhile,the pitch-carbon matrix C/C (PC/C) composites possessed the highest TC and CTE in the parallel and vertical direction.And most of the performances of pyro-carbon/resin carbon matrix C/C composites were between those of the RC/CDENSIFICATION OF CARBON/CARBON COMPOSITESDENSIFICATION OF CARBON/CARBON COMPOSITES USING CNT-CONTAINING PHENOLIC RESIN behavior were studied using the three-point bending test according to ASTM D-790.The fracture . For the effect of CNT addition,although the open porosity was lower

Cited by 5Publish Year 2018Author Chunyu Cheng,Hejun Li,Qiangang Fu,Liping GuoThe Effect of the Addition of CNTs on the Microstructure

The effects of the addition of carbon nanotubes (CNTs) on the morphology and microstructure of Al-Al 2 O 3 nanocomposites and the subsequent effects on their densification and mechanical behavior are studied.From the morphologic study,ball milling was found to be more intensified in the presence of 2 wt.% of CNTs wherein steady state was reached after 5 h of milling.CiteSeerX Effect of Carbon addition and Sintering Effect of carbon addition on diffusion of Cu in SH737-2Cu system was investigated.After compaction and transient liquid phase sintering at 1120 Effect of carbon addition on the densification behavior#176;C and 1180 Effect of carbon addition on the densification behavior#176;C,samples were characterized for densification,showing rise in sintering density and reduction in swelling on addition of 0.9 % carbon.12345NextEffect of Nanopowder Addition on the Sintering of Water Jul 01,2020 Effect of carbon addition on the densification behavior#0183;A promising method of improving the densification of powder metallurgical steel components is to blend nanopowder with the otherwise typically used micrometre-sized powder.The higher surface-to-volume ratio of nanopowder is hypothesized to accelerate the sintering process and increase the inter-particle contact area between the powder particles.This is supposed to enhance

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