Characterization of All Carbon Composites Reinforced with In situ Synthesized Carbon Nanostructures

2014 ◽  
Vol 1611 ◽  
pp. 145-151 ◽  
Author(s):  
F. C. Robles Hernandez ◽  
H. A. Calderon ◽  
D. Barber ◽  
A. Okonkwo ◽  
R. Ordoñez Olivares ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Carbon Nanostructures ◽  
High Energy ◽  
Graphitic Carbon ◽  
Carbon Composites ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Method

ABSTRACTIn this work results are presented regarding carbon composites produced by high energy mechanical milling and consolidated by spark plasma sintering. The involved energy input in such a processing method has been used to develop composite materials and to synthesize effective in-situ reinforcement. In the as milled and sintered composites various dispersions of graphene, graphitic carbon, and diamonds in an amorphous matrix are found. The graphene, graphitic carbon and diamond phases are synthesized primarily during milling. The TEAM-05 microscope has been used for characterization that is complemented with Raman results. The spark plasma sintering method enhances the presence of graphene, graphitic carbon and diamonds.

scholarly journals Characterization of In-Situ Cu–TiH2–C and Cu–Ti–C Nanocomposites Produced by Mechanical Milling and Spark Plasma Sintering

Metals ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 117 ◽  
Author(s):  
Nguyen Thi Hoang Oanh ◽  
Nguyen Hoang Viet ◽  
Ji-Soon Kim ◽  
Alberto Moreira Jorge Junior
Keyword(s):  
Spark Plasma Sintering ◽  
Mechanical Milling ◽  
Plasma Sintering ◽  
Spark Plasma

Reactive Sintering of TaB2 Using Spark Plasma Sintering Method

2014 ◽  
Vol 88 ◽  
pp. 54-59 ◽  
Author(s):  
Jolanta Laszkiewicz-Łukasik ◽  
Lucyna Jaworska ◽  
Piotr Putyra ◽  
Barbara Smuk
Keyword(s):  
Spark Plasma Sintering ◽  
High Energy ◽  
Tantalum Powder ◽  
Composition Analysis ◽  
Reactive Sintering ◽  
Boron Powder ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
High Level ◽  
Sintering Method

Tantalum diboride was synthesized and sintered from metallic tantalum powder and amorphous boron powder in one technological process using Spark Plasma Sintering method. The precursors were: tantalum with grain size below 5μm and boron with particle size in the range of 1-2μm. Tantalum powder, before mixing with boron, was subjected to high-energy milling under argon atmosphere in order to reduce specific surface area. The process should be carried out without air, due to protection against the influence of oxygen. During reactive sintering SPS process oxidation participation should be limited because of high exothermic reactions. Morphologies of the powders before and after milling were studied using SEM. Reactive sintering processes were carried out at temperatures from 1800°C up to 2200°C at 48MPa. Sintering duration was in the range of 1-30min. Volume changes of samples and temperature increase during the synthesis were observed and determined. The result of X-Ray phase composition analysis and microstructure observations using SEM are presented. Relative density, Young's modulus, Vickers hardness and fracture toughness of the materials were determined. During the reactive sintering the material of only one phase TaB2, with high level of densification, was obtained.

The Cu Matrix Strengthened by TiH2–C In-Situ Synthesized via Mechanical Milling and Spark Plasma Sintering

2021 ◽  
Vol 21 (4) ◽  
pp. 2687-2691
Author(s):  
Nguyen Thi ◽  
Hoang Oanh ◽  
Nguyen Hoang Viet
Keyword(s):  
Spark Plasma Sintering ◽  
Mechanical Milling ◽  
Sintering Temperature ◽  
Annealing Treatment ◽  
High Energy ◽  
Composite Powders ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Tic Nanoparticles

The present work is focused on the fabrication and the investigation of microstructures of copperbased TiC nanocomposites produced by mechanical milling in a high energy planetary ball mill. TiH2, carbon and copper powders were used as starting materials in which In-Situ reaction between carbon and TiH2 occurs to form TiC nanoparticles. The mixture powders of Cu–TiH2–C were milled for 12 h at 450 rpm in Argon gas. Annealing treatment process at 950 °C for 2 h was applied for as-milled composite powders to enhance In-Situ reaction. The consolidation of composite powders was conducted by spark plasma sintering under uniaxial pressing of 70 MPa. Sintering procedure was done at 950 and 1000 °C for 5 min. The results indicated that as TiC nanoparticles are formed after sintering at 950 °C and the TiC particles are increased up at higher sintering temperature of 1000 °C. Fracture surface of sintered samples shows ductile mode. HR-TEM image showed the crystal size of copper was about 10 nm for sample sintered at 1000 °C. The hardness and relative density of the nanocomposites increase when increasing sintering temperature.

Production and Characterization of Boron Carbide – Titanium Diboride Ceramics by Spark Plasma Sintering Method

2010 ◽  
Vol 63 ◽  
pp. 68-73 ◽  
Author(s):  
Berkay Uygun ◽  
Gültekin Göller ◽  
Yücel Onüralp ◽  
Filiz Çinar Şahin
Keyword(s):  
Spark Plasma Sintering ◽  
Applied Pressure ◽  
Ethanol Solution ◽  
X Ray Diffraction ◽  
Bending Tests ◽  
Plasma Sintering ◽  
Density Values ◽  
Spark Plasma ◽  
Sintering Method

This study was carried out to produce and characterize B4C - TiB2 ceramics by spark plasma sintering. Initial B4C and TiB2 powders were mixed in ethanol solution with YSZ balls for 1 hour. Sintering was performed with 5, 10, 15 and 20 volume % TiB2 containing mixtures respectively in disc-shaped graphite dies. The applied pressure was 40 MPa at 1760 °C for 5 minute sintering duration. The improvement of low sinterability and low strength of B4C was investigated as well as strength of flexibility, hardness and fracture toughness. The obtained products were characterized by X-ray diffraction and SEM imaging. The hardness values were measured under 1000 g load and the density values were measured with Archimedes' principle. The 3-point bending tests and modulus of elasticity measurements were also conducted.

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