scholarly journals Investigations of Interface Properties in Copper-Silicon Carbide Composites

2017 ◽  
Vol 62 (2) ◽  
pp. 1315-1318 ◽  
Author(s):  
M. Chmielewski ◽  
K. Pietrzak ◽  
A. Strojny-Nędza ◽  
D. Jarząbek ◽  
S. Nosewicz
Keyword(s):  
Silicon Carbide ◽  
Vapour Deposition ◽  
Adhesion Force ◽  
Laser Flash ◽  
Copper Matrix ◽  
Flash Method ◽  
Plasma Sintering ◽  
Metal Ceramic ◽  
Spark Plasma ◽  
Sic Composites

AbstractThis paper analyses the technological aspects of the interface formation in the copper-silicon carbide composite and its effect on the material’s microstructure and properties. Cu-SiC composites with two different volume content of ceramic reinforcement were fabricated by hot pressing (HP) and spark plasma sintering (SPS) technique. In order to protect SiC surface from its decomposition, the powder was coated with a thin tungsten layer using plasma vapour deposition (PVD) method. Microstructural analyses provided by scanning electron microscopy revealed the significant differences at metal-ceramic interface. Adhesion force and fracture strength of the interface between SiC particles and copper matrix were measured. Thermal conductivity of composites was determined using laser flash method. The obtained results are discussed with reference to changes in the area of metal-ceramic boundary.

scholarly journals Influence of Material Coating on the Heat Transfer in a Layered Cu-SiC-Cu Systems

2017 ◽  
Vol 62 (2) ◽  
pp. 1311-1314
Author(s):  
A. Strojny-Nędza ◽  
K. Pietrzak ◽  
M. Teodorczyk ◽  
M. Basista ◽  
W. Węglewski ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Silicon Carbide ◽  
Thermal Properties ◽  
High Temperature ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Plasma Sintering ◽  
Metal Ceramic ◽  
Spark Plasma

AbstractThis paper describes the process of obtaining Cu-SiC-Cu systems by way of spark plasma sintering. A monocrystalline form of silicon carbide (6H-SiC type) was applied in the experiment. Additionally, silicon carbide samples were covered with a layer of tungsten and molybdenum using chemical vapour deposition (CVD) technique. Microstructural examinations and thermal properties measurements were performed. A special attention was put to the metal-ceramic interface. During annealing at a high temperature, copper reacts with silicon carbide. To prevent the decomposition of silicon carbide two types of coating (tungsten and molybdenum) were applied. The effect of covering SiC with the aforementioned elements on the composite’s thermal conductivity was analyzed. Results were compared with the numerical modelling of heat transfer in Cu-SiC-Cu systems. Certain possible reasons behind differences in measurements and modelling results were discussed.

Thermal Conductivities of Cs-M-O (M= Mo or U) Ternary Compounds

2009 ◽  
Vol 1215 ◽  
Author(s):  
Kazuyuki Tokushima ◽  
Kosuke Tanaka ◽  
Ken Kurosaki ◽  
Hiromichi Gima ◽  
Hiroaki Muta ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Thermal Diffusivity ◽  
Room Temperature ◽  
Laser Flash ◽  
Flash Method ◽  
Ternary Compounds ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Thermal Diffusivities ◽  
Thermal Conductivities

AbstractThermal conductivities of Cs-M-O (M= Mo or U) ternary compounds, observed in the pellet-cladding gap region and in the pellet periphery in irradiated oxide fuels with high oxygen potentials, were investigated. Bulk samples of Cs2MoO4and Cs2UO4were prepared by hot pressing or spark plasma sintering, and their thermal diffusivities were measured by the laser flash method from room temperature to 823 K for Cs2MoO4and to 900 K for Cs2UO4. The thermal conductivities were evaluated from the thermal diffusivity and bulk density, and the specific heat capacity values available in the literature. The thermal conductivities of Cs2MoO4and Cs2UO4were quite low compared with UO2(e.g. 0.5 Wm−1K−1at 800 K for Cs2MoO4).

scholarly journals A Study on the Effect of Ultrafine SiC Additions on Corrosion and Wear Performance of Alumina-Silicon Carbide Composite Material Produced by SPS Sintering

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1337
Author(s):  
Ntebogeng F. Mogale ◽  
Wallace R. Matizamhuka
Keyword(s):  
Silicon Carbide ◽  
Powder Processing ◽  
Open Circuit ◽  
Transgranular Fracture ◽  
Corrosion Performance ◽  
Wear Performance ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sic Composites ◽  
Fracture Morphologies

Alumina-silicon carbide (Al2O3–SiC) composites of varying compositions (15, 20, 25 and 30 vol.%)–SiC were produced by the ball milling of Al2O3 and SiC powders, followed by spark plasma sintering. The samples were sintered at a temperature and pressure of 1600 °C and 50 MPa, respectively, thermally etched at 1400 °C and mechanically fractured by hammer impact. The effect of SiC additions to monolithic Al2O3 on the densification response, microstructural and phase evolutions, and fracture morphologies were evaluated. The wear performance of the composites using a ball-on-sample configuration was evaluated and compared to that of monolithic Al2O3. In addition, the corrosion performance of the composites in a 3.5% NaCl solution was examined using open circuit potential and potentiodynamic polarization assessments. SiC additions to monolithic Al2O3 delayed densification due to the powder agglomeration resulting from the powder processing. SiC particles were observed to be located inside Al2O3 grains and some at grain boundaries. Intergranular and transgranular fracture modes were observed on the fractured composite surfaces. The study has shown that the Al2O3–SiC composite is a promising material for improved wear resistance with SiC content increments higher than 15 vol.%. Moreover, the increase in SiC content displayed no improvement in corrosion performance.

Preparation and Characterisation of Gd2Zr2O7 Ceramic by Spark Plasma Sintering

2007 ◽  
Vol 280-283 ◽  
pp. 1507-1510 ◽  
Author(s):  
Qiang Xu ◽  
Wei Pan ◽  
Jing Dong Wang ◽  
Long Hao Qi ◽  
He Zhuo Miao ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Microstructural Characterization ◽  
Laser Flash ◽  
Flash Method ◽  
Immersion Medium ◽  
Air Atmosphere ◽  
Plasma Sintering ◽  
Spark Plasma

Rare earth Gd2Zr2O7 ceramic was prepared by spark plasma sintering from Gd2O3 and ZrO2 powders. The powders were sintered at 1400°C for 10min. The synthesized ceramic was annealed at 800°C for 2h under air atmosphere. XRD structural and SEM microstructural characterization showed the formation of a single phase material with pyrochlore crystal structure. The relative density of Gd2Zr2O7 ceramic was measured by the Archimedes method with an immersion medium of water and the results revealed that the relative density of the ceramic was 92%. The thermal conductivity of the ceramic was tested by laser flash method from room temperature to 700°C. The result shows the thermal conductivity of Gd2Zr2O7 ceramic is lower than that of 7YSZ.

Spark plasma sintering of ZrB2–SiC composites with in-situ reaction bonded silicon carbide

2014 ◽  
Vol 40 (1) ◽  
pp. 821-826 ◽  
Author(s):  
Alberto Ortona ◽  
Miguel A. Lagos ◽  
Giulio Scocchi ◽  
Jorge Barcena
Keyword(s):  
Silicon Carbide ◽  
Spark Plasma Sintering ◽  
In Situ Reaction ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sic Composites

scholarly journals Flash (Ultra-Rapid) Spark-Plasma Sintering of Silicon Carbide

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Eugene A. Olevsky ◽  
Stephen M. Rolfing ◽  
Andrey L. Maximenko
Keyword(s):  
Silicon Carbide ◽  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma

Microstructure of Cu-TiB2 Nanocomposite during Spark Plasma Sintering

2004 ◽  
Vol 449-452 ◽  
pp. 1113-1116 ◽  
Author(s):  
Young Soon Kwon ◽  
Ji Soon Kim ◽  
Jong Jae Park ◽  
Hwan Tae Kim ◽  
Dina V. Dudina
Keyword(s):  
Spark Plasma Sintering ◽  
Titanium Diboride ◽  
Copper Matrix ◽  
Microstructural Change ◽  
Simultaneous Action ◽  
Fine Grained ◽  
Pulse Electric Current ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Pulse Electric

Microstructural change of TiB2-Cu nanocomposite during spark plasma sintering (SPS) was investigated. Under simultaneous action of pressure, temperature and pulse electric current titanium diboride nanoparticles distributed in copper matrix move, agglomerate and form a interpenetrating phase composite with a fine-grained skeleton. Increase of SPS temperatures and holding times promotes the densification of sintered compacts due to local melting of copper matrix.

Effect of Coating on the Thermal Conductivities of Diamond/Cu Composites Prepared by Spark Plasma Sintering (SPS)

2014 ◽  
Vol 722 ◽  
pp. 25-29 ◽  
Author(s):  
Q.L. Che ◽  
X.K. Chen ◽  
Y.Q. Ji ◽  
Y.W. Li ◽  
L.X. Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Theoretical Prediction ◽  
Volume Fraction ◽  
Interface Reaction ◽  
Copper Matrix ◽  
Bonding Force ◽  
Ti Alloys ◽  
Plasma Sintering ◽  
Spark Plasma

The carbide forming is proposed to improve interfacial bonding between diamond particles and copper-matrix for diamond/copper composites. The volume fraction of diamond and minor titanium are optimized. The microstructures, thermal properties, interface reaction production and its effect of minor titanium on the properties of the composites are investigated. The results show that the bonding force and thermal conductivity of the diamond/Cu-Ti alloys composites is much weaker and lower than that of the coated-diamond/Cu. the thermal conductivity of coated-60 vol. % diamond/Cu composites is 618 W/m K which is 80 % of the theoretical prediction value. The high thermal conductivity has been achieved by forming the titanium carbide at diamond/copper interface to gain a good interface.

Resonant ultrasound spectroscopy of silicon carbide ceramics SiC‒AlN

2021 ◽  
pp. 136-140
Author(s):  
E. G. Pashuk ◽  
G. D Kardashova ◽  
Sh. A. Khalilov
Keyword(s):  
Silicon Carbide ◽  
Elastic Moduli ◽  
Ultrasonic Spectroscopy ◽  
Resonant Ultrasound Spectroscopy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Complete Set ◽  
Resonant Ultrasound ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

The paper discusses the possibility of using resonant ultrasonic spectroscopy (RUS) as a source of information for the physics and technology of obtaining silicon carbide ceramics by the example of samples of the composition SiC ‒ 25 % AlN, obtained by the method of spark plasma sintering. The possibility of obtaining a complete set of elastic moduli (EM) of samples with an error of less than 1 % is shown. At the same time, the requirements for surface quality are significantly reduced. The revealed functional relationship between EM and porosity makes it possible to create a non-destructive method of porosity control and calculate the elastic moduli at zero porosity (i. e., the elastic modulus of the ceramic matrix EM0). Comparison of EM0 samples obtained at different parameters of the technological process allows determining their optima values..

Consolidation of SiC Powder Coated with SiO2 Nanolayer by Spark Plasma Sintering

2014 ◽  
Vol 616 ◽  
pp. 32-36 ◽  
Author(s):  
Zhen Hua He ◽  
Hirokazu Katsui ◽  
Rong Tu ◽  
Takashi Goto
Keyword(s):  
Silicon Carbide ◽  
Chemical Vapor Deposition ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Plasma Sintering ◽  
Spark Plasma

Silica (SiO2) nanolayer was coated on silicon carbide (SiC) powder by rotary chemical vapor deposition (RCVD). The SiC/SiO2 composite were consolidated by spark plasma sintering (SPS) at 1923 K using the SiO2 coated SiC powder. The relative density and hardness of the SiC/SiO2 composites increased with increasing SiO2 content, and were 97% and 17 GPa, respectively, at SiO2 content of 22 mass%. The relative density and hardness of a composite consolidated using the mixture powders of SiC and SiO2 (22 mass%) at 1923 K were 81% and 8 GPa, respectively.

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