Recent Research on Spark Sintering Process.

Yanagisawa, Osamu; Hatayama, Takashi; Matsugi, Kazuhiro

doi:10.2320/materia.33.1489

Cited by 52 publications

(26 citation statements)

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“…Spark plasma sintering (SPS) is a newly developed sintering method which can produce relatively large (over 100 mm in diameter) 15,16) and near-net-shape compacts of high relative density much more rapidly than other conventional process such as pressure-less sintering, hot press and HIP. SPS has been applied to an increasing number of materials successfully.…”

Section: Introductionmentioning

confidence: 99%

Densification and Structural Evolution in Spark Plasma Sintering Process of Mechanically Alloyed Nanocrystalline Fe-23Al-6C Powder

et al. 2003

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Nanocrystalline Fe-23 at%Al-6 at%C alloy powder was produced by mechanical alloying of the mixture of iron powder and aluminum powder (Fe-25 at%Al) with methanol, and was consolidated into fully dense compact by spark plasma sintering (SPS) at 1273 K. The compacts have nanocrystalline microstructure composed of mixture of -phase grains and -carbide (Fe 3 AlC) grains whose average grain size is about 50 nm. Although relatively large grains were also observed in places, their sizes were not over a few micrometers. The mechanisms of the densification and the structural evolution during the SPS process are discussed.

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Section: Introductionmentioning

confidence: 99%

Densification and Structural Evolution in Spark Plasma Sintering Process of Mechanically Alloyed Nanocrystalline Fe-23Al-6C Powder

et al. 2003

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“…It was necessary to examine more than 2000 particles to obtain reliable values of the average and variance of LN2D, as demonstrated in an earlier paper. 27) 3. Results…”

Section: Quantitative Characterization Of Microstructurementioning

confidence: 99%

Effect of Volume Fraction on the Flow Behavior of Al-SiC Composites Considering the Spatial Distribution of Delaminated Particles

et al. 2008

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The effect of the volume fraction of second-phase particles on the distribution of damaged particles and its relation to the tensile deformation behavior were investigated in the particle reinforced metal-matrix composites, Al-SiC. The spatial distributions of all SiC particles and the delaminated SiC particles were evaluated from their two-dimensional local number (LN2D). During tensile deformation, larger SiC particles in more highly clustered regions were more easily delaminated at the particle/matrix interface. The amount of particle delamination in the more highly clustered region increased with increasing volume fraction and strain during tensile deformation. A model was developed to explain the flow behavior of the composites; this showed a good fit to the experimental results in the presence of particle damage, especially when the spatial distribution of damaged particles was taken into consideration.

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“…In particular, sintering of titanium based powders, as well as aluminum based powders, is difficult even when the vacuum sintering technique is employed, because its affinity with oxygen is strong. 6) In contrast, spark sintering 7) is a rapid densification process which has the potential to minimize grain growth by enhancing sinterability through both dielectric breakdown of an oxide film between powder particle surfaces by the pulse discharge process 8) and rapid heating by unsteady heat flow in the resistance heating process. 9) Utilization of the spark sintering technique is considered to overcome the several problems mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Ti Matrix Composites of Ti-B-C-N Systems by Spark Sintering and Their Friction and Wear Characteristics

et al. 2007

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The spark sintering technique was utilized for fabrication of titanium matrix composites consisting of a matrix of titanium and precipitated phases of TiB or TiN. Density of composites and amount of precipitated compounds could be controlled by variation of process parameters in the spark sintering. B 2 CN or BN as starting powders was decomposed, and compounds consisting of Ti and N, or solid solutions of N and C in Ti matrix were formed. The hardness also increased by the increase of TiB or TiN contents. The spark sintering at the higher temperature, 1673 K, led to enough promotion of sintering and enough precipitation of TiB as a reinforced phase, which resulted in the increase of values in hardness. The wear was promoted by three different mechanisms, an adhesive type, abrasive type and a mixture of both types, depending on the TiB amount in composites. The amount of precipitated TiB of 11-17 vol% in composites was optimum for improvement of both friction and wear properties in tests under a ring (counterface: SUJ3)-on-disk (specimen: titanium matrix composites) configuration.

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Recent Research on Spark Sintering Process.

Cited by 52 publications

References 0 publications

Densification and Structural Evolution in Spark Plasma Sintering Process of Mechanically Alloyed Nanocrystalline Fe-23Al-6C Powder

Densification and Structural Evolution in Spark Plasma Sintering Process of Mechanically Alloyed Nanocrystalline Fe-23Al-6C Powder

Effect of Volume Fraction on the Flow Behavior of Al-SiC Composites Considering the Spatial Distribution of Delaminated Particles

Preparation of Ti Matrix Composites of Ti-B-C-N Systems by Spark Sintering and Their Friction and Wear Characteristics

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