In situ reaction synthesis of Ti–TiB composites containing high volume fraction of TiB by spark plasma sintering process

2010 ◽  
Vol 503 (1) ◽  
pp. 145-150 ◽  
Author(s):  
Zhao-hui Zhang ◽  
Xiang-Bo Shen ◽  
Sai Wen ◽  
Jie Luo ◽  
Shu-kui Lee ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Volume Fraction ◽  
High Volume ◽  
High Volume Fraction ◽  
Reaction Synthesis ◽  
Sintering Process ◽  
In Situ Reaction ◽  
Plasma Sintering ◽  
Spark Plasma

Efficient Synthesis/Sintering Routes to Obtain Fully Dense ZrB2-SiC UHTC Materials

2008 ◽  
Vol 368-372 ◽  
pp. 1733-1736 ◽  
Author(s):  
Roberta Licheri ◽  
Roberto Orrù ◽  
Antonio Mario Locci ◽  
Giacomo Cao
Keyword(s):  
Spark Plasma Sintering ◽  
Reaction Synthesis ◽  
Efficient Synthesis ◽  
In Situ Reaction ◽  
Plasma Sintering ◽  
Spark Plasma

Two processing routes, both starting from powders of Zr, B4C and Si, which take advantage of the Spark Plasma Sintering (SPS) apparatus, are proposed in this work for the preparation of fully dense 2ZrB2-SiC composite. The first method consists of the in-situ reaction synthesis and densification of the product while, in the second one, reactants are first converted by SHS (Self-propagating Hightemperature Synthesis) into the desired composite and the obtained powders are then sintered by SPS. Based on the results reported in this work, both routes are particularly convenient as compared to the techniques available in the literature for the preparation of analogous materials.

Fabrication by SPS and Thermophysical Properties of High Volume Fraction SiCp/Al Matrix Composites

2006 ◽  
Vol 313 ◽  
pp. 171-176 ◽  
Author(s):  
X.F. Gu ◽  
Lian Meng Zhang ◽  
Mei Jun Yang ◽  
Dong Ming Zhang
Keyword(s):  
Thermophysical Properties ◽  
Volume Fraction ◽  
Coefficient Of Thermal Expansion ◽  
High Volume ◽  
High Volume Fraction ◽  
Matrix Composites ◽  
Sic Particles ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Al Matrix Composites

SiCp/Al composites containing high volume fraction of SiC particles were fabricated by spark plasma sintering (SPS), and their thermophysical properties, such as thermal conductivity (TC) and coefficient of thermal expansion (CTE), were characterized. High relative density (R-D) of composites was successfully achieved through the optimization of sintering parameters, such as sintering temperature, sintering pressure and heating rate. The measured TCs of SiCp/Al composites fabricated by SPS are higher than 195W/m.k, no matter the volume fraction of SiC particles is high or low as long as the R-D is higher than 95%. The measured CTEs of SiCp/Al composites are in good agreement with the estimated values based on Kerner,s model. The high volume fraction of SiCp/Al composites are a good candidate material to substitute for conventional thermal management materials in advanced electronic packages due to its tailorable thermophysical properties.

Spark Plasma Sintering of Silicon Nitride-Boron Carbide Composites

2008 ◽  
Vol 403 ◽  
pp. 225-226
Author(s):  
E. Ayas ◽  
A. Kalemtas ◽  
Gürsoy Arslan ◽  
Alpagut Kara ◽  
Ferhat Kara
Keyword(s):  
Electrical Resistivity ◽  
Spark Plasma Sintering ◽  
Xrd Analysis ◽  
Sintering Process ◽  
Electrically Conductive ◽  
Plasma Sintering ◽  
B4c Particles ◽  
Spark Plasma ◽  
In Situ Reactions

Si3N4-B4C composites containing fine and coarse B4C particles were produced using Al2O3 and Y2O3 as sintering additives via spark plasma sintering (SPS) technique. Phase assemblages of the produced composites were determined by XRD analysis. Si3N4, B4C and in situ formed SiC, h-BN and Si phases were observed. Even when incorporated in significant amounts, B4C was consumed readily in the Si3N4 based system. Consequently, full densification of these composites was found to be a very difficult task due to the simultaneous in-situ reactions, even in fast sintering process. Electrical resistivity measurements carried out at room temperature indicated that addition of both fine and coarse B4C particles decreased the electrical resistivity by several orders of magnitude due to the formation of electrically conductive in-situ phases, mainly SiC and metallic Si.

Improvements on the Properties of the In Situ MgB2/Fe Tapes Annealed by Spark Plasma Sintering Technique

2007 ◽  
Vol 546-549 ◽  
pp. 2059-2062
Author(s):  
Lin Ma ◽  
Hong Li Suo ◽  
Ying Wang ◽  
Hong Xia Ma ◽  
Min Liu ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Vacuum Condition ◽  
Vacuum Furnace ◽  
Sintering Process ◽  
Sintering Mechanism ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Powder In Tube ◽  
Sps Sintering

In-situ MgB2/Fe tapes were fabricated by the powder in tube (PIT) technology using Mg and B powders. The tapes were sintered by both an advanced spark plasma sintering (SPS) and a conventional vacuum furnace, respectively. The effects of these two sintering routes on the properties of the MgB2 tapes were investigated by the analysis of XRD, SEM and the magnetic Jc measurements. It was shown that at 10K, 0T, the magnetic Jc value of the tape sintered using SPS machine at 800°C for 15min under 30MPa were close to 106A/cm2, which was higher than that of the tapes annealed at 700°C for 2h under pressureless vacuum condition. It was found that the density and the homogeneity of the MgB2 core were strongly improved using SPS sintering process, which explained why the MgB2 tapes sintered by SPS method have a higher Jc value. Further enhancement of Jc in the tapes is expected for the understanding of the SPS sintering mechanism.

scholarly journals Synthesis and Characterization of Aluminium Base in situ Metal Matrix Composites by Spark Plasma Sintering

2017 ◽  
Vol 7 (1) ◽  
pp. 14 ◽  
Author(s):  
B. Mallik ◽  
K. Sikdar ◽  
D. Roy
Keyword(s):  
Spark Plasma Sintering ◽  
Metal Matrix ◽  
Volume Fraction ◽  
Thermal Characteristics ◽  
Secondary Phase ◽  
Scanning Calorimetry ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Xrd Techniques

Fe-aluminide and alumina reinforced in-situ aluminium based metal matrix composite was prepared by spark plasma sintering (SPS) of aluminium and nanosized Fe2O3 powder mixture. In-situ reinforcements were formed during SPS by exothermal reaction between aluminium and nano-size Fe2O3 particle. The thermal characteristics of the in-situ reaction were studied by differential scanning calorimetry (DSC). Field Emission Scanning Electron Microscopy (FESEM) along with the Energy Dispersive Spectroscopy (EDS) and X-ray diffraction (XRD) techniques were used to study the microstructural architecture of the composites as a function of SPS temperature and the volume fraction of reinforcement. Microhardness measurement of the composite shows significant increase in hardness with increase in SPS temperature and volume fraction of secondary phase.

Characterization of Carbon Nanotubes/Cu Nanocomposites Processed by Using Nano-sized Cu Powders

2004 ◽  
Vol 821 ◽  
Author(s):  
Kyung Tae Kim ◽  
Kyong Ho Lee ◽  
Seung Il Cha ◽  
Chan-Bin Mo ◽  
Soon Hyung Hong
Keyword(s):  
Carbon Nanotubes ◽  
Spark Plasma Sintering ◽  
Volume Fraction ◽  
Homogeneous Distribution ◽  
Sintering Process ◽  
Multi Wall Carbon Nanotubes ◽  
Plasma Sintering ◽  
Spark Plasma

AbstractCarbon nanotubes (CNTs) have attracted remarkable attention as reinforcement for composites owing to their outstanding properties1-3. CNT/Cu nanocomposites were fabricated by mixing the nano-sized Cu powders with multi-wall carbon nanotubes and followed by the spark plasma sintering process. The CNT/Cu nanocomposite fabricated from nano-sized Cu powders shows more homogeneous distribution of CNTs in matrix compared to that fabricated from macro-sized Cu powders. The hardness of CNT/Cu nanocomposite fabricated from nano-sized Cu powders increases with increasing the volume fraction of CNTs, while the hardness of that fabricated from macro-sized Cu powders decreases with the addition of CNTs.

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